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b2rbfh
Why does caffeine help/sooth ADHD individuals and do the opposite to non-ADHD people?
Biology
explainlikeimfive
[ "eiuwggz", "eiunly2" ]
[ "When scanning the brain of someone with ADHD, you can see that it is actually under-stimulated, rather than over-stimulated like most people think. The hyperactive behaviors typical of ADHD are a result of the brain trying to achieve a balance in an external form, since that internal simulation is lacking. Caffeine (and ADHD meds that I know of) are internally stimulating substances. For someone who lacks that internal mental stimulus, that helps bring the brain up to a balanced state, so they don't need to get that from the environment, and we see a reduction in that adaptive behavior. (I know I said \"stimulus\" like 12 times, it's late. I hope that all makes sense!)" ]
[ 14 ]
[ [], [] ]
[ "url" ]
[ "url" ]
gpvjkx
What caused the housing market crash of 2008?
Economics
explainlikeimfive
[ "frp2vvb", "frozcwt" ]
[ "Greed. That lead to banks issuing loans to people who really could not afford them. The government continued to loosen restrictions and the lending got more and more easy. Eventually banks were tanking on more loans that they didn't feel were going to be paid back and so they bundled them together to sell as investment opportunities. You need to read that as a gamble for people to place a bet on someone will/will not pay their house back on time. Builders were watching the homes get bought up in droves and did what any smart capitalist would do: Tried to supply the ever growing demand. Eventually enough people stopped paying their 1st or 2nd mortgage to where the banks had to start answering for their debt. So, what does one do when they need to buy something they can't afford? They took out loans or leveraged their good assets against the debt. In a simplistic format the banks were following their risky and very much realized awful lending practices. They were doing exactly what their customers were doing by borrowing to afford what they couldn't in reality. Eventually the defaults grew and when the bank had to start paying those debts they couldn't. Now, in reality this isn't actually a crisis for the most part. The reason it collapsed is that Paul owed John who owed Mark....who owed Paul. The issue was that we dropped a lot of sensible legislation due to \"helping the economy grow\" when in reality those rules generally exist because of a crisis. We do this every so often and it almost always ends with a big big problem for the average person. We did it in the 20's, the 70's, 90's, and early 2000's. Why do we keep this cycle going you may ask? Because when those rules get relaxed a lot of people get filthy fucking rich before the bubble collapses." ]
[ 10 ]
[ [], [] ]
[ "url" ]
[ "url" ]
6b1b6k
Why do. American cities lack the tram and subway systems that are prevalent in Europe?
Engineering
explainlikeimfive
[ "dhj0v2g", "dhj01j9", "dhj96nz", "dhj7b9t", "dhjeyyp", "dhj79jf", "dhj1of9", "dhj0roo", "dhje04e", "dhiznsp", "dhjd7rx", "dhjlkw2", "dhjevd3", "dhjel2y", "dhjbaj7", "dhjdq9z", "dhizyx5", "dhja5bz" ]
[ "**lots** of reasons The American rail system is focused on shipping freight which it does very well. Westward expansion took over a century which meant it was difficult to plan where new population centers would be cropping up in relation to the older cities. Lobbying and scheming by motor companies to make America based around the car, the documentary *Taken for a Ride* does a good job covering this. Many states are mostly rural areas which negates the usefulness of light rail somewhat. And finally I think that many people just prefer the freedom and independence afforded by using automobiles." ]
[ 391 ]
[ [], [], [], [], [], [], [ "https://en.m.wikipedia.org/wiki/General_Motors_streetcar_conspiracy" ], [], [ "https://en.m.wikipedia.org/wiki/General_Motors_streetcar_conspiracy" ], [], [], [], [], [], [], [], [], [] ]
[ "url" ]
[ "url" ]
j0sgq8
What is an algorithm?
Mathematics
explainlikeimfive
[ "g6ur1wd" ]
[ "An algorithm is a series of steps to accomplish some goal or task. Usually you hear it in terms of computer science and programming." ]
[ 5 ]
[ [] ]
[ "url" ]
[ "url" ]
if63sg
Why is the human brain considered more "powerful" than a modern computer?
Biology
explainlikeimfive
[ "g2llc6o" ]
[ "Because it can store more, calculate more, do more etc... Computers can do things the human brain can't if it's very specific, but the processing power of the human brain far surpasses it in general. Think of just your eyes, 250,000,000 photons are collected every second and translated into images with incredible resolution within 13 milliseconds. It's about the equivalent of a continuously running 600 Megapixel camera The human brain does a ton of things like that routinely all the time." ]
[ 16 ]
[ [] ]
[ "url" ]
[ "url" ]
6gxhe5
What are the psychological reasons behind seeing and/or formulating conspiracy theories?
Biology
explainlikeimfive
[ "ditxy0t", "ditvzyd", "diujfwh" ]
[ "Here's a couple posts from a recent askreddit thread I read a while back that provide some good insight: posted by thinkofanamefast * \"Conspiracy theories also seem to be more compelling to those with low self-worth, especially with regard to their sense of agency in the world at large. Conspiracy theories appear to be a way of reacting to uncertainty and powerlessness. If you know the \"truth\" and others don't, that’s one way you can reassert feelings of having agency,” Swami says. It can be comforting to do your own research even if that research is flawed. It feels good to be the wise old goat in a flock of sheep.\" \"In 2010, Viren Swami and a co-author summarized this research in The Psychologist, a scientific journal.\" posted by FreshCircuit * The most obviously ignorant people are the ones who over simplify complicated models. They do this in hope that the world can make simple sense. Unfortunately the world is massive and chaotic, and a huge percentage of outcomes are primarily due to chance. It is often at this boundary that our most clever of individuals have their ignorant moments. And it is when they refuse to let go that we see anybody can become ignorant. While this is obvious in hindsight, it hurts to admit that any intelligent person can get locked in their own ideal conclusion given certain circumstances. None of us are perfectand thus none of us are immune. Even moreso when we prefer to use simple models for truths." ]
[ 17 ]
[ [], [], [] ]
[ "url" ]
[ "url" ]
li0xq9
How much DNA do full siblings share in their eggs?
If my wife and sister in law were to have their eggs analyzed, how much DNA would they share?
Biology
explainlikeimfive
[ "gn0goqd" ]
[ "About half. It's an average of course cause of randomness so anywhere from 38% to 61% is still a reasonable result." ]
[ 5 ]
[ [] ]
[ "url" ]
[ "url" ]
hjqlf0
How are illegal immigrants able to work, go to school, own property and pay taxes?
Other
explainlikeimfive
[ "fwo0sxn", "fwnzkwb" ]
[ "I was illegally for 20 yrs so i can anwer better than few misconceptions above stated. 1. First you get a fake green card and social sec card.(the number is random) 2. You get a job because many places, many, many don't care to e verify the documents or dont want to(cheap labor) 3. You can go to school (proof of legal status is not required, unless you want to apply for financial aid, grants, scholarships etc. If you want to apply for the above mentioned you need to privide a real social security number that belongs to you hence you cant apply for financial aid as undocumented. This has changed in the last years in few states i believe. California where i live being one of them. 4. Unfortunately as undocumented you cannot own property unless is co-owned by someone with a valid social security number. Unless you pay cash up front for it. Other forms of property such as cars, furniture, jewelry etc is normally financed through smaller businesses who take the risk and charge a much higher interest or bigger down payment for making such purchases. Banks also extend prepaid credit cards and you can use those to create your credit worthiness. Not one bank would issue a home loan if you are undocumented. Again unless you are an investor or you co-owned. 5. Undocumented immigrants pay income taxes. Yes , the irs issues you an itin number if you cannot provide a social security number. All you need is your birth certificate from your home country and your w2 . Once the irs mails your itin number you can use that number instead of a social security number to file taxes. ( worth noting that many undocumented immigrants have filed taxes and were deported or moved back to their home countries leaving behind unclaimed their social security contributions)" ]
[ 18 ]
[ [], [] ]
[ "url" ]
[ "url" ]
757nts
Why do men and women find specific parts of the body attractive depending on what era it is, for example the 50s were not a time for large breasts or a big butt
Culture
explainlikeimfive
[ "do4hah1", "do45xfd", "do4v380", "do4w5xb" ]
[ "> the 50s were not a time for large breasts or a big butt Pinup Bette Brosmer: URL_0 Sophia Loren and Jayne Mansfield: URL_1 Jane Russell: URL_2" ]
[ 12 ]
[ [ "https://i.pinimg.com/564x/22/29/c2/2229c22b4271a15f063c7e1ff9a99e5d.jpg", "http://assets.nydailynews.com/polopoly_fs/1.1999039.1415133305!/img/httpImage/image.jpg_gen/derivatives/article_750/939453a.jpg", "http://i.dailymail.co.uk/i/pix/2011/03/02/article-1362040-0D6DBB9B000005DC-917_634x500.jpg" ], [], [], [] ]
[ "url" ]
[ "url" ]
d47jpf
Where do doctors go to look things up?
Biology
explainlikeimfive
[ "f08d8xt" ]
[ "In addition to what everyone else has said, the reality is that Doctors use Google *a lot*." ]
[ 3 ]
[ [] ]
[ "url" ]
[ "url" ]
8u94pk
monthly subscription boxes that tout one item costing more than the entire subscription.
Economics
explainlikeimfive
[ "e1dh5x8", "e1dmk0r" ]
[ "1. They don't pay that price for it in the first place - just like any shop doesn't pay the price they charge you. 2. Customers who don't cancel - future boxes may not be as good a deal so they recoup on people who continue with the subscription. 3. Numbers. Related to point 1 in that the more people who subscribe, the better price they can get by buying in larger bulk quantities. 4. Buying surplus stock which other places don't want anymore - this can be a huge saving." ]
[ 12 ]
[ [], [] ]
[ "url" ]
[ "url" ]
8r1s3m
Do atoms or molecules have colour?
How do things get their colour? Does each molecule have its own colour which gives an object it's colour or is it the atoms that have colours. I feel like, if you can't see oxygen or hydrogen because air is transparent, is that the reason why water is also transparent?
Physics
explainlikeimfive
[ "e0npej7", "e0npbtp", "e0npekv" ]
[ "When a photon interacts with the electrons on the outside of an atom, some of the interactions result in a photon of a different wavelength (= color). Certain molecules hold their atoms in a way that causes them to absorb all but one color and reflect that color, and we call these molecules pigments." ]
[ 7 ]
[ [], [], [ "https://images.google.com/imgres?imgurl=http%3A%2F%2Fmedia.factmyth.com%2F2016%2F07%2Fvisible-spectrum-of-light.jpg&imgrefurl=http%3A%2F%2Ffactmyth.com%2Ffactoids%2Fvisible-light-is-electromagnetic-radiation%2F&docid=vNC4_Cc7ld63yM&tbnid=iEHJjcLHYbTjvM%3A&vet=1&w=1200&h=630&hl=en-us&source=sh%2Fx%2Fim" ] ]
[ "url" ]
[ "url" ]
dspwke
If the (US) economy is doing great why is the national debt so high?
Economics
explainlikeimfive
[ "f6qyvy4" ]
[ "Think of it like making $250,000 a year... you’re doing great! But you spend $500,000 a year. So you borrow another $250,000. And you just keep doing that. Sure your salary is great, but you are just spending way beyond it." ]
[ 3 ]
[ [] ]
[ "url" ]
[ "url" ]
aclosz
What is Citizens United and why is it a big deal that it's proposed to be overturned?
Other
explainlikeimfive
[ "ed8wnk3" ]
[ "Citizens United v. Federal Election Commission is a US Supreme Court decision from 2010. The United States Supreme Court held that the free speech clause of the First Amendment to the Constitution prohibits the government from restricting independent expenditures for communications by nonprofit corporations, for-profit corporations, labor unions, and other associations. What that means is that the government cannot restrict corporations from running partisan election advertisements, television shows, movies, etc. Previous to the ruling there were a lot of restrictions on how and when corporate entities could engage in campaigning during elections. Many people feel that allowing unlimited electioneering by corporate interests is destructive to democracy, and would like to amend the Constitution to allow the government to once again regulate that activity." ]
[ 15 ]
[ [] ]
[ "url" ]
[ "url" ]
6lzz0u
Did mechanical and analog computers use Logic Gates before transistors? If so, how were they implemented?
Also, if they didn't use Logic Gates, what did they use instead for arithmetic and such; and how was whatever they used instead implemented? Thanks
Engineering
explainlikeimfive
[ "djxwqwx", "djxvusc", "djxvz51" ]
[ "You can totally build mechanical logic gates and build basic computing elements like half-adders and more complex stuff from this. There are videos out there of people having build stuff like this from Lego and similar. [(Example)]( URL_0 ) The problem here is that these tend to be big and clunky and if you add up enough of them to be useful you will get into real mechanical troubles very fast. Electrically you can use devices such a vacuum tubes to have the same function as transistors made from semiconductors and build logic gates out of them. Early digital computers were build out of large numbers of vacuum tubes which had the unfortunate side-effects of burning out all the time, limiting the working time of computers and were also quiet big making miniaturization hard. Analogue computers (both electrical and others) were never that popular and didn't really use logic gates as they were never really based on the on/off dichotomy but instead worked by using what may thought of a sliding scale of values for inputs and outputs. Before electronic computer became common mechanical computers exited that may be said to be digital after a fashion, but they generally did not use the modern logic gate based design. There were calculators based on cog and wheel designs that you could use to automate basic arithmetic operations. Leibniz (who simultaneously with Newton invented calculus) created a working model of a mechanical calculator which function by means of cleverly arranged gears, cogs and cranks to allow someone to do basic calculations. This design with refinements lived on up until the point where electronics became good enough to build handheld calculators. The famous [Curta]( URL_1 ) calculator is an example of this type of mechanical computers that were used up until the 1970s." ]
[ 5 ]
[ [ "https://youtu.be/5X_Ft4YR_wU", "https://en.wikipedia.org/wiki/Curta" ], [], [ "https://www.youtube.com/watch?v=05-53R5fr8U", "https://upload.wikimedia.org/wikipedia/commons/1/17/Sliderule_2005.png" ] ]
[ "url" ]
[ "url" ]
crfo4w
Can obese people live longer without eating than people with average body mass?
Biology
explainlikeimfive
[ "ex4ypoi", "ex4jl8k" ]
[ "Very much so. There was a man who went over a year without eating food. He took vitamin pills and would drink water, coffee, or tea (mostly calorie neutral drinks), but ate no food for like 380ish days. Lost more than 250 pounds during the process. [source]( URL_0 )" ]
[ 6 ]
[ [ "https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2495396/pdf/postmedj00315-0056.pdf" ], [] ]
[ "url" ]
[ "url" ]
b068m1
When deleting apps, games, etc, from your computer, where does that data go? How does that memory it used to take up, get erased?
Technology
explainlikeimfive
[ "eicce2z", "eiccdh2", "eice1fz", "eiccqs8" ]
[ "Your game occupies a house in your PC's disk. You tell your PC you don't want that game anymore. The house continues to be there, it doesn't get erased or go anywhere. But as soon you install a new game, your PC will build a new house on top of the old one." ]
[ 46 ]
[ [], [], [], [] ]
[ "url" ]
[ "url" ]
epkpuk
Why does blood rush to your head but not your feet?
When you go upside blood will rush to your head but when you are staying blood doesn't rush to your feet. Why is that?
Biology
explainlikeimfive
[ "fejytw6", "fek6v6j", "fekgtqz" ]
[ "It can. Your body is designed to operate in the upright position at 1G (blood pressure keeps the system moving properly). If you want blood to pool (rush) in your your lower body you just have to go past 1G. This happens to fighter pilots during extreme maneuvers. The result is you'll black out. Fighter pilots wear suits that literally squeeze their lower bodies and force blood back up to the rest of their system. Low blood pressure can also create this pooling affect. Blood rushes to your head while inverted bc your body is literally fighting gravity to get blood to your brain. If it suddenly has gravity doing that job for it, blood pools in the head and without gravity assist to leave, can also make you pass out. Part of the reason astronauts must be in peak physical condition. Too high or too low blood pressure in zero G environment could make you sick." ]
[ 8 ]
[ [], [], [] ]
[ "url" ]
[ "url" ]
fcb9bb
Why are many food products labeled with “not for individual sale” ?
I’ve noticed living in North American that many items sold in bulk such as tea, candy, soda, etc. are labeled as “not for individual sale”. Can anyone explain why? I’ve always wondered.
Other
explainlikeimfive
[ "fj9kkn5", "fj9kp34", "fj9knm9" ]
[ "They're intended for sale as a bulk pack, for less money. The individual packs inside generally don't have as much information on them and therefore won't comply with the local regulations on food packaging labelling. The company making them only has to worry about updating artwork for the outer pack without having to change the inside pack, which saves them money and means that if, for example, they have millions of unused inner packs, they can continue to use them while only changing the outer pack, or they can change the outer pack whenever they want for promotions etc. without changing everything else." ]
[ 24 ]
[ [], [], [] ]
[ "url" ]
[ "url" ]
7t6830
what kind of math, if any, is behind traffic lights especially in major cities? Is it a difficult process to time them in sync with surrounding lights to make sure there are no huge back ups?
Engineering
explainlikeimfive
[ "dta57ds", "dta5i3t", "dtaapnz" ]
[ "Traffic engineers have models that incorporate any new lights into the existing network of traffic lights. Traffic light timing is done both to synchronize the lights with the surrounding network, but also to ensure that people don't have to wait too long at the lights. So there's lots of math behind it, but it's mostly done with computer programs." ]
[ 13 ]
[ [], [], [] ]
[ "url" ]
[ "url" ]
acmwka
why do camera flashes turn on for a second before turning off again and flashing for just a moment when the picture is taken?
Technology
explainlikeimfive
[ "ed96snu" ]
[ "The extra light can help the camera to auto focus in advance of taking the picture, and also make people's irises contract to reduce red eye in the photo." ]
[ 10 ]
[ [] ]
[ "url" ]
[ "url" ]
6kpbeh
- What exactly caused Illinois to go into such deep debt?
Economics
explainlikeimfive
[ "djnv208" ]
[ "To begin with, Illinois had a normal amount of debt for a state. Probably some parts of its debt are larger than average - for example, there's always a lot of talk about pensions for state workers. It also wasn't great about matching up taxes and revenue with the money it was promising to spend, so a long-term projection looked bad. Still, this was all within the realm of \"normal\" until 2014. In 2014, Republican Bruce Rauner was elected governor, but the Democrats kept control of the state legislature, led by House Speaker Mike Madigan. Madigan, it should be noted, has been House Speaker since 1983. So even if that's all you knew about the situation, you'd know that politicians in Illinois were in for a fight. In the red corner, Rauner came into office hoping to pursue a business-friendly agenda. He was a businessman himself before coming into office, and he talked about bringing businesses into Illinois by making it less expensive (lowering taxes on businesses, loosening some regulations, etc.). Rauner talked about \"corrupt union bosses\", and wanted to get laws passed that would take away bargaining power from unions. Republicans have been very supportive of Rauner, both because Rauner has donated his own money to other Illinois Republicans, and because they're a little tired of Madigan's control. In the blue corner, Democrats in Illinois have been union-friendly for a *long* time, and are not about to stop now. So the unions are solidly behind Madigan, and since Madigan has been House Speaker for so long, and has done so under both Republican and Democratic governors, Democrats are following his lead. What happened then? They couldn't agree on a budget. Rauner insists that any budget include some of his pro-business/anti-union agenda, and Madigan refuses. Democrats have control of the legislature, so they can pass a budget, but they can't get past Rauner's veto. Since 2014, Rauner and Madigan have been political chicken, refusing to be the first to back down. Everyone's angry about this, but Democrats are angry at Rauner and Republicans are angry at Madigan, so there hasn't been much movement toward compromise. The lack of a budget means that for a lot of things, even when Illinois is sitting on the money to pay for stuff, it doesn't have the legal authority to pay for it. The government has managed to pass a few stopgap measures that pays for a few things (most schools, keeping government offices open, paying for road repair), but there's a whole lot of bills going unpaid and *racking up interest*. On top of the unpaid bills and the interest they're collecting, Illinois's debt rating has fallen pretty low (I think it's now junk status, or close to it). That means that if Illinois wants to borrow more money, its interest rates are going to be *terrible*. Of course, the only way to dig your way out of a financial hole like this is to raise taxes or cut spending, so however this works out, it's going to be unpleasant and politically difficult." ]
[ 5 ]
[ [] ]
[ "url" ]
[ "url" ]
62okhw
Why,if higher frecuency waves can pierce deeper into materials, we can receive radio waves in a room, but light cant pass trough walls?
I mean, if we are in a room with no windows we can still listen to the radio, for example. However, visible light cant go through a wall even if it has higher frecuency. Why?
Physics
explainlikeimfive
[ "dfo4xot", "dfo6oyq" ]
[ "Because actually *lower* frequency waves are often quite good at passing through materials. This is a different mechanism from the way *extremely high* frequency waves pass through materials -- but both are avoiding being of the size that the atoms in the material would absorb. By the way, you can see this with sound waves too: closing the door will keep out the treble of your neighbor's annoying techno rave music, but not the bass." ]
[ 9 ]
[ [], [] ]
[ "url" ]
[ "url" ]
5r2vmw
Why does it appear that there is more emphasis on awareness foundations for woman than men?
URL_0 is an effort to raise awareness of heart disease in women, which is the number one cause of death for women. The thing I don't understand is it's also the number one cause of death in men. Why not just raise awareness for heart disease?
Culture
explainlikeimfive
[ "dd403di", "dd46gkv", "dd4f3nv" ]
[ "Because heart disease affects women differently than men. The heart problems that typically affect men are very obvious and tend to get treated. The heart problems that typically affect women are much less obvious or mimic the affects of other, less serious, health issues." ]
[ 10 ]
[ [], [], [ "http://www.apa.org/monitor/dec04/women.aspx" ] ]
[ "url" ]
[ "url" ]
5letsn
Why do newspapers often have random sentences where a l l t h e w o r d s a r e w r i t t e n l i k e t h i s?
Other
explainlikeimfive
[ "dbv5ig7", "dbv4udy", "dbvl0rq", "dbv4v8u", "dbvi6hf" ]
[ "Newspaper columns are justified on both the left and right, which means that the left margin and the right margin are both straight (see [this image]( URL_0 ) for a visual explanation). There are a couple of techniques you can use to get both margins straight, and usually you use a combination of both: you can use hyphenation to break up longer words, and you can adjust the spacing between words, or between individual letters. In most publications you barely notice it, but newspapers typically use very narrow columns. Because they use such narrow columns, it's harder to get the text to justify correctly, and often words or letters are spaced out so far it becomes noticeable. In the days before computers were used to set type, this was done by hand, and it's a very difficult thing to get exactly right: newspapers had to be printed very quickly, so text justification was often done poorly. With modern technology, the process can be automated, but now the problem is getting the software to understand what looks neat and professional to a human, and what doesn't." ]
[ 372 ]
[ [ "http://www.visionengravers.com/support/images/CNCEngravingGlossary/Justification.gif" ], [], [], [], [] ]
[ "url" ]
[ "url" ]
ik03ac
What happens when a person gets sued for say, 10 million, but they don't actually have the money or the means to get it?
Economics
explainlikeimfive
[ "g3h884j", "g3h9u1w" ]
[ "It depends on the situation. That person would most likely appeal, and depending on their circumstances they could later come to an agreement with the plaintiff on a lower amount within their financial capabilities. If the defendant has no assets this is usually what will happen. Otherwise, the plaintiff could move to seize whatever assets the defendant owns against the value of the settlement, and the court could order part of the defendant's paycheck be diverted to the plaintiff until the debt is paid." ]
[ 5 ]
[ [], [] ]
[ "url" ]
[ "url" ]
c3yq33
how do show/ movie directors get shots and scenes of totally abandoned cities?
Take the walking dead for example, in season 1 Rick was walking through the ghost town Atlanta before walking into walkers. Take alien 2 on earth for example, at the end how was there no one in the city?
Other
explainlikeimfive
[ "eru35sm", "eruamkk", "eru39e0", "erud44j", "eruokzb" ]
[ "They're not in real cities. They're on a movie set, and the rest of the city is faked with CGI. Check out [this demo reel]( URL_0 ) of how prevalent CGI is in TV shows." ]
[ 63 ]
[ [ "https://www.youtube.com/watch?v=clnozSXyF4k" ], [ "https://www.quora.com/How-did-they-shoot-the-Deserted-London-scene-from-28-Days-Later-2002" ], [], [], [] ]
[ "url" ]
[ "url" ]
nvydbx
How much 5G cell tower radiation dissipates within 3 feet of antenna? "Read description"
I understand that radiation from 5G towers are not of danger to the average person, but rather workers exposed for long periods of time and close to antennas. But 5G towers have labels warning of not entering within 3 feet of such an apparatus. My question then being, how much radiation from a 5G antenna dissipates within 3 feet?
Technology
explainlikeimfive
[ "h16tbrs", "h162hzt", "h160pz0" ]
[ "Others have answered the power question, but I’d to emphasize that these transmitters are **non-ionizing** radiation. The only thing they can do is heat you up. They can’t cause cancer or mutate your DNA or anything else scary you could think of." ]
[ 6 ]
[ [], [], [] ]
[ "url" ]
[ "url" ]
6ppw5w
Why do we get hungry every few hours, even when we haven't burnt all the energy/calories from our previous meal(s)?
I'm sure there's something very obvious that I'm missing, but I don't get why humans get hungry all the time even if there's plenty of energy left to burn. For instance, if we eat a breakfast that's 1500 calories and then sit on the couch all day and only burn maybe 700 calories, why do we feel hungry again a few hours later, even though there's still 800 calories left? If I had to guess, I would guess that the feeling of hunger (like stomach growling)is a technique our body uses to tell us that we need more food and more energy. But why does our body make us feel hungry even if there is leftover food that we haven't burned yet?
Biology
explainlikeimfive
[ "dkrbupa", "dkr82aj", "dkrhdok", "dkrkcur" ]
[ "We get hungry when our body is about to start the process of warming up the furnace to burn fat. There may be plenty of calories available in our bodies, enough to last for days, but we get hungry when we run out of the \"easy to access\" energy and our blood sugar level gets low. Blood sugar levels have a certain safe range -- too low and we're weak, too high and the blood turns toxic. When we eat, blood sugar levels rise as food gets digested and sugars get added into the bloodstream. If it rises above a certain point, our body starts skimming off the top and putting the excess into fat. If it falls below a certain point, we get hungry, and if it falls even further, we start burning off that fat to return those sugars to the bloodstream. Hunger fades once the fat is burning and sugar levels rise. When the fat calories run out, we just get tired not hungry because the body is already in \"fat burning\" mode. As soon as we eat anything (edit: anything with any sugar), our body immediately stops burning fat and switches to using the incoming food instead. When that runs out, you get hungry again as part of flipping the switch back to fat use." ]
[ 26 ]
[ [], [], [], [] ]
[ "url" ]
[ "url" ]
bsz3qp
How do random glitches happen on computers and smart phones when the code is perfectly fine?
Technology
explainlikeimfive
[ "eos1rgj", "eos6k0k" ]
[ "They happen because the code is never perfectly fine. There are errors in any software. The code just mostly works, while in a stable situation. Once in a while something unexpected happens - like a network loss, or a hardware problem, or some weird user input - and the software might not be ready for this kind of scenario. This is when you see a glitch." ]
[ 24 ]
[ [], [] ]
[ "url" ]
[ "url" ]
bwhd5l
Why do some baseball fields have higher walls and seemingly more difficult standards for hitting a home run in baseball?
Other
explainlikeimfive
[ "epxl02i" ]
[ "At the end of the day, tradition. Back in the day, baseball fields were built wherever there was space, with as much seating as they could get in comfortably, with uniformity not really a big factor. Which is why you get big outliers in older stadiums, most famously Fenway Park in Boston, which was built to fit in a tightly-packed city and which famously had to deal with a very shallow left field by building an extra-tall wall called the \"Green Monster\" to compensate. So because of the history associated with those classic old parks, it was just sort of accepted that field dimensions would be more variable than other sports, which require standardized field sizes. Modern fields have to fit within a relatively small range for their outfield fences, but there's a grandfather rule in effect to keep old, historic parks like Fenway from having to be bulldozed. If you look at most fields built in the last two decades, they've been able to build away from city centers, where there's space for a nicely-shaped field and plenty of seating." ]
[ 10 ]
[ [] ]
[ "url" ]
[ "url" ]
823iop
How do Search and Rescue teams looking for lost hikers ensure they don't get lost themselves?
Other
explainlikeimfive
[ "dv786an", "dv7980g" ]
[ "One could argue that perhaps search and rescue teams are little bit more prepared than some lost people are. What with radios, maps, gps, compasses, and an entire support team of people who are aware of and being updated regularly by the SAR team." ]
[ 13 ]
[ [], [] ]
[ "url" ]
[ "url" ]
jk4mqy
How does Tourettes work exactly and why does it make you just blurt out profanities most of the time?
Biology
explainlikeimfive
[ "gagr7d0", "gagrov7", "gagrcrb", "gagrpun" ]
[ "Nobody knows for sure how it works, but it’s not just profanity shut up. It could be in the form of noises, clicks, coughs, or certain ticks." ]
[ 9 ]
[ [], [], [], [ "mayoclinic.org" ] ]
[ "url" ]
[ "url" ]
gwiyih
How do dryer sheets keep your clothes Static free and less wrinkly?
Chemistry
explainlikeimfive
[ "fsv6uyg" ]
[ "Static sheets are covered in wax. In the dryer, the wax melts, which lubricates your laundry so it doesn't stick to other laundry. Sometimes it's advised that you don't dry your towels with a dryer sheet because a thin coating of wax on them makes them worse at drying." ]
[ 4 ]
[ [] ]
[ "url" ]
[ "url" ]
nqw2yy
why cant you just inject blood with an extremely high oxygen level to resuscitate them
Im taking when they’re not already dead, just unconscious or not having the ability to breathe. Or maybe with cardiac arrest and you inject the blood while doing chest compressions.
Biology
explainlikeimfive
[ "h0d0lfr", "h0d3uqv" ]
[ "The problem isn't just insufficient oxygen, it's also that CO2 builds up in the blood and makes it overly acidic. You'd have to run the blood through a scrubber to replace the CO2 with Oxygen, but those machines are very expensive ([ECMO]( URL_0 ))" ]
[ 16 ]
[ [ "https://en.wikipedia.org/wiki/Extracorporeal_membrane_oxygenation" ], [] ]
[ "url" ]
[ "url" ]
6u1lvh
Why do production companies tell us about movie release dates 2 or 3 years before they are even set to come out in theatres?
Culture
explainlikeimfive
[ "dlpbeoe", "dlp63r3", "dlp61wt", "dlp8808", "dlp7vkj" ]
[ "They’re also announcing it for other studios. Disney and Warner Brothers don’t want to both plan one of their big movies for the same weekend. Sales for both would suffer as a result. Disney is the reigning king of the box office right now (based on annual totals), and they’re basically calling dibs on the best calendar dates years in advance. Other studios can then work around that calendar." ]
[ 188 ]
[ [], [], [], [], [] ]
[ "url" ]
[ "url" ]
e3zzxb
Why does “greasy” or fried foods help a hangover? Is this true?
Biology
explainlikeimfive
[ "f95v36u", "f95wj25", "f960dz4" ]
[ "The fats in greasy food help coat the lining of your stomach, which could help you **before** you drink, but it doesn't do much, in particular, the morning after. Really, you just want any old kind of food to help replenish your vitamins, nutrients, fats, electrolytes, etc." ]
[ 8 ]
[ [], [], [] ]
[ "url" ]
[ "url" ]
k3akdh
How does the military / government decide who gets drafted during a war other than having to be 18+?
Other
explainlikeimfive
[ "ge1gyxy", "ge1fp53" ]
[ "During the Vietnam war, they assigned a random number number to every day on the calendar. Anyone whose birthday was on day #1 was in the first draft group called up. Example: My brother's birthday, January 10, was #214. That means they would have had to call up days 1 through 213 before my brother would be called up - tens of thousands, so my bro didn't have to worry about the draft for that year. Additionally, there were medical,educational and skill-based and other exemptions to the draft, so even if your number was called, if you had one of those exempltions (like bone spurs), you didn't have to go. Some of the exemptions (like educational) favored those rich enough to use them." ]
[ 15 ]
[ [], [] ]
[ "url" ]
[ "url" ]
bo0c4a
How come when you open task manager to close a slow program, the program will sometimes suddenly start working again as if nothing is wrong?
Technology
explainlikeimfive
[ "enayxsv", "enazoiy" ]
[ "I hope someone who knows some in depth details on this can chime in, but the short version is: Opening the task manager by your standard ctrl+alt+delete is not like starting any other program. It's treated by Windows differently, and interrupts other functions for a moment - that's why it can work even when the OS is otherwise nonresponsive. Sometimes it's enough to give whatever was causing the hangup a push - it depends on a lot of variables and what was actually causing the application to stop responding." ]
[ 36 ]
[ [], [] ]
[ "url" ]
[ "url" ]
f2qccw
how do power plants ground sudden excess of power?
Let's say a whole neighbourhood or an industrial area got disconnected from the network. How would a power plant / network deal with the sudden excess power, and what's the biggest issue in handling it? Let's assume that no immediate storage like batteries is available, only things that need some time to start working.
Engineering
explainlikeimfive
[ "fhe27u3", "fhe2rxh" ]
[ "In the very short term, all the moving parts in the generators act like a flywheel to store energy. If excess power is being generated, all the generators speed up slightly, and the grid frequency rises. Some power plants can be set up to monitor the frequency and automatically increase or decrease their output to compensate. You can see the changes in the UK's power grid frequency [here]( URL_0 )." ]
[ 9 ]
[ [ "https://gridwatch.co.uk/frequency" ], [] ]
[ "url" ]
[ "url" ]
cg896t
Why do you not see your bone when shining light on your finger?
I was watching a meme compilation on youtube and one of the videos showed a girl shining her phone flashlight on her finger, you could see the vessels but not the bone, why does this happen? For reference, you can find it here on minute 9:59: [ URL_0 ]( URL_0 )
Biology
explainlikeimfive
[ "eufaukv" ]
[ "Photons (visible light) going through human tissue will refract and diffuse. X-rays going through, however, will cause much less diffusion and refraction and therefore a much sharper image of hard objects such as bones. You can actually see bone with a strong enough light. Your phone’s LED isn’t as strong." ]
[ 10 ]
[ [] ]
[ "url" ]
[ "url" ]
5sjamh
Why do international bodies refuse to recognize Taiwan?
I recently read that Taiwan was a founding member of the UN and held the seat for China until 1971, when the People's Republic of China replaced it in UN functions. Why were they replaced, and why have international bodies ostensibly opposed to communism recognize the People's Republic instead?
Other
explainlikeimfive
[ "ddfiocx", "ddfpbwn", "ddfj0g8" ]
[ "The *Republic of China* is a founding member of the United Nations. During the Chinese Civil War, the rival government calling itself the People's Republic of China defeated it and took control over most of Chinese territory. The Republic of China government retreated to Taiwan and its minor surrounding islands. Accordingly it is often called just \"Taiwan\" for short. Both governments agree that China should not be split up, and so there must be only one legitimate government of China. This is called the \"One China Principle.\" When other governments started to recognize the People's Republic as the legal government of China, mostly for the practical reason that it had actual control over nearly all of its people and territory, they could thus not also recognize the Republic of China (that is, Taiwan). That's also why the People's Republic replaced the delegation from the Republic of China in the United Nations, instead of both having seats." ]
[ 6 ]
[ [], [ "https://books.google.com.au/books?id=RUeMAQAAQBAJ&pg=PA11&lpg=PA11&dq=China+Taiwan+nuclear+weapons+recognition&source=bl&ots=lwztzjfJT0&sig=bLj23Ln59stO4KESa00k5CXqMg4&hl=en&sa=X&ved=0ahUKEwj7stmdoP_RAhXHW5QKHftpCb44ChDoAQgiMAI#v=onepage&q=China%20Taiwan%20nuclear%20weapons%20recognition&f=false" ], [] ]
[ "url" ]
[ "url" ]
7rwz7r
How is Terry Crews able to maintain so much muscle mass despite intermittent fasting?
Biology
explainlikeimfive
[ "dt0flpg" ]
[ "Intermittent fasting is actually related to improved muscle mass. Rats that ar fed 12-14 hours a day lose muscle and gain fat. Rats restricted to 12 hours a day eating gain muscle and lose fat. Restricting to 10 hours a day has an even greater effect. And this is what intermittent fasting is; not eating anything which starts your gut and stomach working for at least 12 hours every day. Why do you think its called Break Fast for a morning meal? The ancients knew." ]
[ 3 ]
[ [] ]
[ "url" ]
[ "url" ]
e16drx
Why do most commercial airliners have those little pods on the bottom of the wing? Are they for stability or extra fuel storage?
Engineering
explainlikeimfive
[ "f8n02c2" ]
[ "They are Flap Track Fairings which contain the necessary gear to move the flaps on the wings. They can also be Anti-Shock bodies, which reduce wave drag at transonic speeds." ]
[ 10 ]
[ [] ]
[ "url" ]
[ "url" ]
kon6w0
How are ocean waves created?
I don't quite understand their movement and why they crash against the shores.
Physics
explainlikeimfive
[ "ghs2gcr" ]
[ "I’m sure somebody will be here soon with a great answer. Until then, here’s my limited knowledge on it: The gravitational pull of the moon has a big part to play in the tidal movements. Also, wind blowing across the water pushes it causing waves to form. Undersea currents play some type of role in the process too but I’m not sure how they work. Source: Earth science in jr. high lol" ]
[ 5 ]
[ [] ]
[ "url" ]
[ "url" ]
87r79u
Why do bigger explosives form a "mushroom cloud" when they go off?
Repost
explainlikeimfive
[ "dwewnmk", "dwf7zpd" ]
[ "They make hot air. Hot air rises (the stem). This rising hot air carries debris (the cloud). Eventually the rising air reaches equilibrium with its surroundings and spreads out (the cap)." ]
[ 80 ]
[ [], [] ]
[ "url" ]
[ "url" ]
kfhbpu
on wars and how they begin or how they are prepared.
Other
explainlikeimfive
[ "gg8fwmz", "gg8gj5w", "gg8ga3z" ]
[ "Well the truth is often they didn't. They learned during the battles, or from past battles how to act, but war is chaos and unpredictable. A typical example is the start of WW1. Noone knew what the new technology really meant, and expected a good offensive like in napoleonic times would work out (some even commanded meele attacks with bayonetts). But machine guns and heavy atillery just wiped every charging infantry out. It was a bloody reality that noone really knew how to deal with, until much later tanks and stormtroop tactics were invented. \"Plans are worthless, but planning is everything\" ~Eisenhower" ]
[ 5 ]
[ [], [], [] ]
[ "url" ]
[ "url" ]
nt034k
How do seashells get created especially the patterns on them?
Earth Science
explainlikeimfive
[ "h0qkbmg" ]
[ "It’s basically an exoskeleton created out of chitin aka carbonate calcium (you know the rock that goes fizz when you add acid to it). The animals create it themselves. And you know your fingerprints are basically how a pattern that’s random? Same thing here. The patterns you see are the growth streaks that happen as the shell grows! Yep the shells you see are 100% organic and are a result of evolution!" ]
[ 3 ]
[ [] ]
[ "url" ]
[ "url" ]
gyp2hp
Why does the Moon affect the ocean daily causing tides but not other things like plants, winds, clouds etc.?
Physics
explainlikeimfive
[ "ftbqszz", "ftbpzo2", "ftc42y6" ]
[ "Okay. Let's say you're making a pizza. You have the ball of dough and you gently pull the whole ball toward yourself. It's still going to be pretty much the same shape, right? Now imagine instead of pulling the whole ball, you just grab one part of it and pull it towards you. This will stretch out the dough. That's what causes the tides. Tides are not due *just* to the force of gravity from the moon. They're due to the fact that the force of gravity is weaker on the far side of the Earth and stronger on the close side of the Earth. The moon is effectively stretching out the Earth like pulling on a pizza dough. This is because gravity is stronger when you're close and weaker when you're far away. Now if you take a plant, which is approximately 250,000 miles away from the moon, the difference in this force of gravity between the close and far side of the plant is so miniscule it might as well be zero. But the Earth is thousands of miles wide... so there is a noticeably different force of gravity, which causes the moon to \"stretch\" the Earth out. And since water has no defined shape, we see this stretching mainly in the ocean's tides." ]
[ 175 ]
[ [], [], [] ]
[ "url" ]
[ "url" ]
5xhzth
How has the food situation in Venezuela become to be as bad as it is?
Culture
explainlikeimfive
[ "dei78av", "deijdcx" ]
[ "The country's top like 95% of exports are all oil/petroleum based products. Oil prices are really low right now, which means what they so heavily relied on is now not enough to keep them thriving. So since their economy is tanking, they don't have the money to import a lot of things, food being one of those items. So many Venezuelans are actually going to neighboring countries just to do grocery shopping, at an affordable price." ]
[ 13 ]
[ [], [] ]
[ "url" ]
[ "url" ]
679hf4
Why do ads attached to videos tend to load faster with better quality than the actual video I'm trying to watch?
Technology
explainlikeimfive
[ "dgonzqc", "dgp773j" ]
[ "The ads are presented to many people in your area for many different types of requests so they are kept in a local cache while your specific video likely is not. Think about going to a car parts store and requesting a specific part. They need to go find it on the racks of many different parts. Also they give you a flyer of coupons with your order, a stack of which is kept at the front counter because they always need them for every order. The coupons are easy to get ahold of just like the advertisement is kept handy." ]
[ 86 ]
[ [], [] ]
[ "url" ]
[ "url" ]
8ncie4
Why do some companies go by different names in different parts of the world? (i.e. Lays in U.S., but Walkers in the U.K.)
Other
explainlikeimfive
[ "dzuhlpe", "dzuhcfx" ]
[ "To address your specific example: Walker's was founded in 1948, and wasn't purchased by Frito-Lay (a division of Pepsico, and the owner of Lay's) until 1989. They kept the Walker's brand because it already had a lot of recognition and goodwill built up with UK customers." ]
[ 3 ]
[ [], [] ]
[ "url" ]
[ "url" ]
73ulas
what the benefit of using a buffer?
I'm reviewing some python code here and I'm wondering, what's the deal with a buffer size? Why is this convention useful? For reference this is the code: def main(): buffersize = 50000 infile = open('olives.jpg', 'rb') outfile = open('newfile.jpg', 'wb') buffer = infile.read(buffersize) while len(buffer): outfile.write(buffer) print('.', end='') print('Done')
Engineering
explainlikeimfive
[ "dntapaj", "dntbzbt" ]
[ "It's to reduce the number of system calls you perform. Every time you call \"write\" it invokes the OS to actually write to the file. This takes a lot longer than a normal method invocation, so instead of calling \"write\" 1000000 times to write a byte each time, you can call it 20 times and write 50000 bytes each time. If you're wondering why you can't just read and write the whole file at once, you can - so long as you have enough RAM available to store the whole contents of the file in memory. If you're working with very large files you may not be able to fit it all in RAM and/or you don't want your program to use more memory than it needs to." ]
[ 9 ]
[ [], [] ]
[ "url" ]
[ "url" ]
e4h67j
Why are animals and plants so distinct, e.g why aren't there any plants that can walk or animals that do photosynthesis?
Biology
explainlikeimfive
[ "f9au9e1", "f9bgco3", "f9b84bf", "f9bbpbz" ]
[ "There are animals like a sponge that you would likely mistake for a plant if you didn't know better, and plants that can move and eat \"meat\" like a venus fly trap. I know that plants and animals are different in that plants have cell walls and animals have cell membranes, and given how far back on the tree of life we are related, those two things must be really different and important." ]
[ 63 ]
[ [], [], [], [ "https://en.wikipedia.org/wiki/Golden_algae", "https://en.wikipedia.org/wiki/Plasmodium_falciparum", "https://en.wikipedia.org/wiki/Kelp" ] ]
[ "url" ]
[ "url" ]
it2bxs
Why are adjectives so commonly used in place of the correct adverb?
It happens so often (and from respectable sources that you'd think would know better) that I've begun to question my understanding of grammar. Is this a real thing that bothers others or am I misunderstanding how to use adverbs/adjectives?
Other
explainlikeimfive
[ "g5bu6p8", "g5budky" ]
[ "Could you provide us with an example? Do you mean that instead of using an adverb with a proper inflection, they use an adjective instead?" ]
[ 3 ]
[ [], [] ]
[ "url" ]
[ "url" ]
9xncfk
I just saw the results of a survey on the news. They had an error margin of "3.3 percentage points, 19 times out of 20." What's the error margin the remaining 1 time out of 20?
Mathematics
explainlikeimfive
[ "e9tkalr", "e9tnkyz" ]
[ "The other one time out of twenty, the margin of error is more than 3.3 percentage points. Let's say the result of the survey was 50% yes. This means that half of the respondents said yes to the survey. Now what does that say about all the people who didn't answer the survey? If only two people were asked, it doesn't say a lot. But if a lot of people were asked, the survey is very likely to be a good reflection of the general population (barring problems with the way survey respondents were selected, which is pretty common). So saying there is a margin of error of 3.3 percentage points 19 times out of 20 means that there is a 95% chance (19/20) that if you asked every single person, 46.7%-53.3% of the population would say yes to the survey question." ]
[ 7 ]
[ [], [] ]
[ "url" ]
[ "url" ]
6mzt2z
Why do humans like music ?
Repost
explainlikeimfive
[ "dk5nakl" ]
[ "Melody and rhythm can trigger feelings from sadness to serenity to joy to awe; they can bring memories from childhood vividly back to life. From an evolutionary point of view, however, music doesn’t seem to make sense. Unlike sex, say, or food, it did nothing to help our distant ancestors survive and reproduce. Yet music and its effects are in powerful evidence across virtually all cultures, so it must satisfy some sort of universal need. Music triggers activity in the nucleus accumbens, the same brain structure that releases the “pleasure chemical” dopamine during sex and eating. Animals get that same thrill from food and sex, but not, despite the occasional dancing cockatoo, from music." ]
[ 4 ]
[ [] ]
[ "url" ]
[ "url" ]
k92fbo
Why do people say no one can beat the market returns when people have gotten 1000% returns before?
Economics
explainlikeimfive
[ "gf1kzhh", "gf1ky8i" ]
[ "No one can reliably beat the market returns is a more accurate statement. Sometimes you get lucky at a slot machine. Sometimes you don’t. No one can reliably tell you they are going to win at slots. Same goes for the market." ]
[ 13 ]
[ [], [] ]
[ "url" ]
[ "url" ]
6xd9i4
Why do some people always feel tired after waking up (no matter how many hours they have slept), and others always wake up with a burst of energy?
Biology
explainlikeimfive
[ "dmf11z1", "dmf14z4", "dmf11is", "dmf0n39", "dmf5zvc", "dmf1c32", "dmffyvc", "dmfha8h", "dmfh3bb", "dmf89fe", "dmfi9gm", "dmf8pj9", "dmfif1d", "dmfj77m", "dmfbwwx", "dmf1jbz", "dmfel3c", "dmffu0z", "dmh4edz", "dmfia5j", "dmfhev8", "dmfldkc" ]
[ "It is possible that you could have a sleep disorder, like sleep apnea, which causes you to wake up multiple times an hour and also deprive your body of oxygen. It can cause some serious health issues, including being tired all the time no matter how much you sleep. Source: I have apnea. Talk to your doctor." ]
[ 208 ]
[ [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [] ]
[ "url" ]
[ "url" ]
i8vvq1
Why are some humans smarter than others?
Biology
explainlikeimfive
[ "g1b5e5y", "g1b3nov" ]
[ "As you might expect, its a complicated question from just about every angle. - To even start, how do you measure someones intelligence? This test would also have to be culturally neutral, which is something IQ testing has comically failed to achieve in the past. - Lets say you can do that, what kinds of intelligence are the important ones to consider? Mathematical skills, social ability, spatial reasoning, pattern recognition, logical reasoning, emotional regulation? How will you balance these factors to come to your final score? - You have to control for the effects of the obvious stuff like education, nutrition, how they were raised, economic standing, training, etc to hope to determine someones 'innate' intelligence. So before you can even start to figure it out scientifically, there are a lot of points of ambiguity and entryways for bias (unintentional or otherwise). This will likely never be conclusively determined simply due to the inherent subjectivity of the task and inability to divorce environmental factors from the innate (ie, nature vs nurture)." ]
[ 5 ]
[ [], [] ]
[ "url" ]
[ "url" ]
c0sqf0
If you cut a piece of soap off with a dirty knife (say salmonella), what happens to that piece of soap? Is it infected or neutralized?
Biology
explainlikeimfive
[ "er79g4e", "er768ln" ]
[ "Soap doesn't neutralize bacteria, it latches on to it, then gets washed off. It basically drags the germs off your hand." ]
[ 5 ]
[ [], [] ]
[ "url" ]
[ "url" ]
ls0elt
What's the difference between religion and cults?
Other
explainlikeimfive
[ "gooje7q" ]
[ "Honestly, in a lot of ways there really aren't a lot of huge distinctions. Cults and Religions both rely on a faith-based belief system that people must adhere to regardless of, and contrary to, common sense, reason, and Scientific evidence. Religions become \"Cults\" when their controlling behavior starts isolating people from non-believers, controls their income, life choices, dress, and drastically demands perfect obedience to the authority of the Church or Leader. Usually they have some fantastical belief that varies from that of traditional organized religions. Good examples would be Scientology, Cell factions of radical Muslim terror groups, pretty much any Fundamentalist church (lol), Snake handlers, Nation of Islam, et cetera, et cetera." ]
[ 10 ]
[ [] ]
[ "url" ]
[ "url" ]
61p424
Why do the U.S. (and many other nations) have fiat currencies?
This doesn't make sense... It used to be that everyone was on the gold standard, right? So you could exchange one currency for another because you knew that no matter what, you had the same amount of gold. This is seriously confusing, so please remember that I'm a five-year-old trying to learn economics.
Economics
explainlikeimfive
[ "dfg6xdp" ]
[ "Pegging your currency to shiny metal means you give up quite a bit of control over your money supply. You can't \"poof\" in money like with a fiat currency, for example. This can be dangerous. Take the Great Depression, for instance. Banks don't store all of their deposits--they store a fraction of it and loan the rest. So when many people ask for their money back at the same time, the banks can't, and they fail. Their failure causes others banks who loaned them money to fail. These days, the Federal Reserve can jump in. Banks can take loans from them. They can increase the amount of money we have. In 2008, the Federal Reserve bought a bunch of worthless loans from the Banks with money poofed in from nowhere to stabilize the economy." ]
[ 7 ]
[ [] ]
[ "url" ]
[ "url" ]
l40yir
Why can other mammals easily give birth by themselves but humans seem to need to put a lot more effort into giving birth?
Biology
explainlikeimfive
[ "gkkwr24" ]
[ "Bipedia and big heads makes us born underdevellopped but still quite big for the woman pelvis. It is a problem of balance between head and hips size." ]
[ 7 ]
[ [] ]
[ "url" ]
[ "url" ]
6of8rt
What's the difference between name brand and generic branded drugs?
Repost
explainlikeimfive
[ "dkgwgo1" ]
[ "Most of the time there's no significant diffrence except the price of the drug. When a pharma company develops a new drug they're allowed to keep the patent on the drug for an x amount of years, for that time they've effectively got a monopoly on the production and sale of the drug. This is in order to recoup the development costs of the drug. After several years this patent expires and everyone is allowed to produce the drug, leading to the much cheaper generic brand versions of the drug." ]
[ 6 ]
[ [] ]
[ "url" ]
[ "url" ]
6103f6
What is the difference between the original atom bomb and the Hydrogen Bomb?
Physics
explainlikeimfive
[ "dfaon59", "dfaol5n" ]
[ "An \"Atom Bomb\" is a fission-only bomb; splitting Uranium or Plutonium atoms. A \"Hydrogen Bomb\" is a fission-triggered fusion-enhanced bomb. A conventional fission bomb sets off a secondary fusion reaction (fusing hydrogen atoms); the resulting ultra-powerful fusion reaction causes a much higher fission yield (in traditional A-bombs, lots of the material is blown away in the initial bomb and gets wasted. With the H-bomb, much more of the uranium/plutonium reacts for a much huger explosion). Maximum yield for a fission bomb is under 1 megaton. Maximum yield for a fusion bomb is unknown; a 50 megaton bomb has been tested successfully before." ]
[ 9 ]
[ [], [ "https://en.wikipedia.org/wiki/Nuclear_weapon#Types" ] ]
[ "url" ]
[ "url" ]
amlwhp
Why is it ok for a bariatric surgery diet to consist of 1k cal or less/day, but for women/men without surgery the minimum is 1200/1500?
Are these very limited calorie restrictions not harmful to the body in the same way it would be for some non surgical patient? (Especially when they are not absorbing everything anyway.) How is this method of weight loss any different from a “starvation diet” ? Edit:Sorry for the poor wording in the original question. I’m talking LONG TERM, such as a year or two down the road from post op day 1. Are these surgical patients able to go back to eating enough calories to maintain their new body weight? Or are they forever limited by their new digestive system to eat smaller amounts? If so, does that have any toll on the body?
Other
explainlikeimfive
[ "efn3b8y", "efn8oq3", "efmz666", "efnfrwg", "efncigj", "efnkoan" ]
[ "RD who used to work in bariatric surgery here! & #x200B; People are often advised to consume > 1200-1500 calories for a couple of reasons. First, lower calorie intakes can lead to decreased metabolic rate as an adaptation response, which can result in easier weight regain (see Biggest Loser studies). Secondly, eating less than this makes it difficult to get enough micronutrients, especially in the absence of medical advice/supervision. & #x200B; These things are also true of people who have had bariatric surgery, but the decreased metabolic rate is not such a big deal since their reduced stomach capacity makes it more difficult to eat more than this/regain weight anyway. It wasn’t unusual for me to see patients 2+ years post-op who quite comfortably maintained their weight eating 1200 calories per day, wayyy less than you’d expect someone their weight to need. They are also advised to take lots of vitamin supplements and get regular blood work to screen for nutrient deficiencies!" ]
[ 61 ]
[ [], [], [], [], [], [] ]
[ "url" ]
[ "url" ]
b4ry9e
why do you get new allergies as an adult?
About a year ago I started going into anaphylactic shock after eating peppermint. I LOVE peppermint. Now I can't have it and I'm scared to eat a lot of snacks with mint just in case. I'm 26 years old.
Biology
explainlikeimfive
[ "ej8txne", "ej9q9il" ]
[ "I would check out It's Okay to Be Smart on youtube. They do a good episode on this (im bad at links)" ]
[ 5 ]
[ [], [] ]
[ "url" ]
[ "url" ]
5pfdog
what are muscle knots?
I was getting a back rub yesterday and my wife found a knot in my back that kept "clicking" when she would pass over it. What is it and what is the best way to get rid of them?
Repost
explainlikeimfive
[ "dcqta2u", "dcqsm4d" ]
[ "Muscle 'knots' or trigger points are a frequent discussion topic among health professionals and no one can really agree on what they are. There are a lot of conflicting opinions etc out there but we do know that muscle releasing techniques (massage/dry needling/acupuncture/foam rolling or using a spikey ball) can help alleviate any pain related to them. As for the clicking, that can be caused by rolling tendons or bands of muscle across each other or over a boney point/surface. It's normal for these to feel a bit sore when applying pressure to them so no need to be concerned or anything. Stretching and the other aforementioned methods are great for treating these 'knots'. However please don't try to dry needle or acupuncture yourself. That would be silly." ]
[ 12 ]
[ [], [] ]
[ "url" ]
[ "url" ]
7a9pr1
Why are video game graphics just now becoming so detailed and in depth? 10 years ago, you couldnt see reflections or walk up stairs properly, but now you can? What has happened to code writing that's allowed this?
Technology
explainlikeimfive
[ "dp8933n", "dp899e7", "dp89iii" ]
[ "It’s not code really. It’s waaaay more powerful processing being widely available. Both CPUs and GPUs. All of those details take a ton of processing power to do, processing power that 10 years ago wasn’t so readily available." ]
[ 24 ]
[ [], [], [] ]
[ "url" ]
[ "url" ]
heskzn
What is three phase electricity and how is that different from “normal” electricity?
Engineering
explainlikeimfive
[ "fvt9lz1" ]
[ "Think about holding a rope in your hands. Someone tugs on it from one end and keeps pulling. You feel heat generated from friction. This is analogous to Direct Current (DC). The energy transferred from the rope to your hand is constant. Now imagine someone tugging back and forth between the two ends. First it tugs one way, generates heat from friction, pauses, then tugs the other way, again generating heat from friction. This is analogous to Alternating Current (AC). The energy transfered from the rope to your hand is not constant. There is a pause between each tug. (AC) is how we transfer energy through electricity for most applications, and is exclusively how we transfer energy through electricity over long distances. It comes with significantly less energy loss. The problem is most uses of electricity need that energy delivered at a constant pace, such as DC. Well now imagine there are two ropes in your hand. As the end of one tug is approaching, the second rope starts its tug. By the time the end of the secind rope tug is coming up, you've begun the opposite direction tug of the first rope. While the energy transfer is not constant, it is a lot more constant than the single rope case, while maintaining the benefits of AC not having as much energy loss. Three phase electricity is three ropes, whose timing is evenly spaced out to provide even better constant energy transfer" ]
[ 43 ]
[ [] ]
[ "url" ]
[ "url" ]
5rqe2c
What is the detail of the Australian deal to resettle refugees in the USA?
Other
explainlikeimfive
[ "dd9d3zr" ]
[ "The Australian government has a policy that states that no refugees ariving by boat will be settled in Australia. The adoption of this policy has stopped new boat arrivals but there are about 1,250 prospective refugees sitting in offshore detention centres that are currently faced with the choice of \"go back to where you were fleeing from\" or \"remain indefinitely in a prison camp\". To rectify this Australia made two seperate deals with the US. One of these involved the US taking these prospective refugees, vetting them and settling them in the US. The other involved Australia agreeing to take in Central American refugees from camps in Costa Rica and settle them in Australia. Both governments claimed that these deals are not linked but due to their timing they almost certainly are. The government also made it very clear that this was a one-off deal and so it likely won't inspire too many others to try to reach Australia by boat. **TL:DR - Abdul for Juan refugee swap.** Edit: Changed my joke." ]
[ 3 ]
[ [] ]
[ "url" ]
[ "url" ]
miprhl
Is the Earth's Orbit around the sun linked to the Seasons?
The tilt of the Earth is 23.5 degrees. As I understand it, this causes the Earth to warble like a top, and this will then cause the seasons. A tropical year (time between two equinoxes) is 20 minutes shorter than a calendar year (time it takes rotate around the sun). & #x200B; My question is: Are these two related? It seems like a very small margin of error between the two. Or is it a huge coincidence?
Earth Science
explainlikeimfive
[ "gt5xqau", "gt5xe8e", "gt5y8dz" ]
[ "Earth does warble like a top, but it’s not noticeable within one year. It takes several dozen thousands of years to make one full warble. So seasons are not about that. The Earth keeps its axis straight, but the northern end of that axis looks away from the Sun in December and towards the Sun in July, making these months cold and warm respectively. That’s in the Northern hemisphere. For Southern hemisphere it’s the other way round." ]
[ 11 ]
[ [], [ "https://en.wikipedia.org/wiki/File:Earth_axial_precession.svg", "https://spaceplace.nasa.gov/seasons/en/" ], [] ]
[ "url" ]
[ "url" ]
8d4a2x
If I fill a lighter with compressed liquid butane, and some gas spills on the floor (cold feeling gas is noticeable when filling), what happens to it after 24 hours?
Chemistry
explainlikeimfive
[ "dxk58zk", "dxk7mlr" ]
[ "It’s evaporated within minutes. Don’t ban this answer I’m not good at contrived sentences lol" ]
[ 19 ]
[ [], [] ]
[ "url" ]
[ "url" ]
9aviyr
How do movie studios make money from box office sales?
Economics
explainlikeimfive
[ "e4yfprk" ]
[ "Theaters agree to give a certain percentage of ticket sales back to the studio in exchange for rights to display the movie. Exactly how big a percentage is negotiated when theaters purchase the rights to show movies. Big chains often return a fairly small percent, since they have a lot of negotiating power, while smaller chains and independent operators usually pay more." ]
[ 5 ]
[ [] ]
[ "url" ]
[ "url" ]
gfh6ky
Why do songs or thoughts pop into our heads randomly even though we haven't been thinking/listening to them in years?
Psychology
explainlikeimfive
[ "fptmb90", "fptkzis" ]
[ "Because your mind isn’t you. Your mind is a TV that randomly brings up images you didn’t necessarily ask for. (If you controlled your mind, why would you ever think a negative thought?) Once you realize that you aren’t your mind, you see thoughts like a random itch or tingle on your arm. Why does your arm itch or tingle sometimes? Not sure. Something is going on. But it’s not me, and I can choose how much attention I pay, and what importance I give that tingle." ]
[ 5 ]
[ [], [] ]
[ "url" ]
[ "url" ]
6nfpjh
why does our body sometimes twitch uncontrollably when we try to fall asleep?
occasionally when i'm about to fall asleep, my legs will jerk/spasm and i'm not sure what causes it
Biology
explainlikeimfive
[ "dk933u5", "dk9d27g" ]
[ "It's the hypnagogic state. Part of your brain is asleep and dreaming. But it hasn't shut down the part of your brain that keeps you conscious and the part that controls motor movement." ]
[ 19 ]
[ [], [] ]
[ "url" ]
[ "url" ]
5x449u
If chess is considered a sport, why not checkers?
Other
explainlikeimfive
[ "def2kiq", "def3c56" ]
[ "A lot of people wouldn't consider chess a sport, a few people would consider checkers a sport. To get to what you're asking in why someone would consider chess a sport, but not checkers, chess has a damn near infinite amount of possible moves that to this day, we've not been able to build a computer that has solved chess(impossible to lose). Checkers was solved decades ago." ]
[ 7 ]
[ [], [] ]
[ "url" ]
[ "url" ]
le8bkq
Given a pen lid or cap doesn't hold a vacuum (some are even ventilated) why do pens dry out if the lid or cap is left off?
Physics
explainlikeimfive
[ "gmawueu" ]
[ "I would add that the pens likely don't really dry up much due to cap on/off, but rather you're less likely to store them tip down if they're uncapped, which leads them to appear to dry out; Tip down is the best way to keep the ink at a higher pressure due to gravity." ]
[ 5 ]
[ [] ]
[ "url" ]
[ "url" ]
mx1sv8
Why do you feel more tired when sunburnt?
Biology
explainlikeimfive
[ "gvljpja", "gvli69k", "gvm3oxx", "gvlu6i9", "gvmb89v", "gvlwb6t", "gvn3j93", "gvnnx16", "gvnbsrs", "gvngwbi", "gvotes6" ]
[ "\"Sunburn\" is another name for \"nuclear radiation damage to millions of cells across a wide area of the body\". 1. There is a flurry of activity by DNA-repair enzymes and other repair processes. 2. Those cells with irreparable damage sense it and commit mass cell-suicide to avoid becoming cancer. Their \"bodies\" then need to be swept up and taken away. All together, that is a massive drain on your immune system and body energy stores. And at the same time, being sunburnt probably means you were outside a long time - which means you're likely dehydrated and maybe muscle fatigued from hiking, swimming etc. Add all that to the radiation damage and it's no wonder you're wiped. & #x200B; Edit: I didn't mean alpha/beta/gamma radiation, it's solar UV (*electromagnetic* radiation from a nuclear explosion) that causes sunburn." ]
[ 14741 ]
[ [], [], [], [], [], [], [], [], [], [], [] ]
[ "url" ]
[ "url" ]
5zjj8t
Why do we catch the common cold so often?
If the human immune system is built to build immunity to diseases and the likes, and store them in the "library" of other diseases so you wont get sick from them again. Why is it that we catch the *common* cold so often? Are there multiple ones? Or can we just not be immune to it?
Biology
explainlikeimfive
[ "deyjr2k" ]
[ "The answer is that there are multiple ones. In fact there are over 200. Of which 99 are strains of the Rhinovirus. Vaccination against one strain doesn't seem to give much immunity to the others. They are also constantly mutating and making more and different strains." ]
[ 5 ]
[ [] ]
[ "url" ]
[ "url" ]
6e0c8h
Why do bees create honey? If it's their food, I feel like a jerk taking their food from them.
Mostly I'm just curious about the purposes of honey for bees. But on another tangent, if we are taking their food, how do they survive? Are they just way overproducing the honey?
Biology
explainlikeimfive
[ "di6uomh", "di6opeb", "di6qpw6", "di6v671", "di6oi4c" ]
[ "In the case of the European honeybee they make and store honey for the same reason that humans, ants, and other animals that can store food and can't hibernate store food. European bees had to store food and developed honey as the way to do it. For the modern honey bee, they have been bred to maximize a colonies production of honey. They are cared for and housed by humans and humans often produce the sources they will produce honey from. The upside for the bees is fantastic, some protection from natural predation, a more or less guaranteed source of foodstuff, and outside maintenance of their hive and the protection it offers. Humans, in return, get the excess honey the bees generate, as the bees produce vastly more honey than the colony actually needs and if the honey were not harvested the colony would actually collapse. Source: My grandfather had over 72 hives of bees when I was a kid and a teenager. I have done everything you could think to do when it comes to bee farming, including making beeswax candles." ]
[ 14 ]
[ [], [], [], [], [] ]
[ "url" ]
[ "url" ]
fcojuw
- If all electronics in the world were shut off/disconnected at the same time, what would happen to the electricity currently in the power grid as well as the new electricity being produced right now?
Physics
explainlikeimfive
[ "fjc6omq" ]
[ "Electricity isn't like water in pipes, there isn't a stored up volume in the power grid. Think of it like transferring a push via a long rod; if you stop pushing on one end then the other end stops pushing as well, you aren't somehow consuming the rod to obtain the push so it is irrelevant how much rod there is when you stop. As for the generators currently running, with the huge drop in resistance they are going to spin much more freely and might even be damaged by the sudden change in demand. The power plant operators would quickly slow them down and take them offline as no longer needed." ]
[ 11 ]
[ [] ]
[ "url" ]
[ "url" ]
jw8und
Why does something get darker when it absorbs a liquid?
Physics
explainlikeimfive
[ "gcoqzk8" ]
[ "We see light and darkness on object based on light bounced off and and return to our eyes. More light bounced off = a brighter object. Water has a intermedium infraction index, means light travels through it. When water get on a shirt, light that normally bounces off the shirt will now travel through the water and pass through the shirt. since less light is bounced off = darker item." ]
[ 11 ]
[ [] ]
[ "url" ]
[ "url" ]
nn4bmn
How does an automobile's gearing affect its torque versus its top speed?
What do they change/how do they use gearing to affect either, and can there be aspects of both with the same gearing?
Engineering
explainlikeimfive
[ "gzsemaa", "gzsg7q5" ]
[ "The best way to explain this is to compare it to a mountain bike with multiple gears. The first gear has a large sprocket and it's good for getting off from a stop or going uphill and through mud, sand and snow. You won't be able to go very fast but you have all the torque you need to power through the terrain. At the other end you have the final gear, it's extremely difficult to use this from a stop but once you're up to speed you can really get moving. The gear reduction in a cars transmission works on the same basic principal." ]
[ 11 ]
[ [], [] ]
[ "url" ]
[ "url" ]
ko0nwv
How and why did people come up with the idea of taking something as bitter as cacao beans and masking the flavor with sugar to create sweet snacks from it?
Like, wasn't there something more suitable for the job?
Other
explainlikeimfive
[ "ghnkqj7" ]
[ "Bitter/sweet is one of the oldest flavor combinations around! Many bitter substances have subtle flavor compounds that, by themselves, are overpowered by the bitter flavor. But sweet and bitter counteract one another, allowing a more subtle taste profile. That said, the cacao bean was actually used *long* before it was sweetened. Native cultures of the Americas (which is where the bean is originally from) made a bitter stimulant drink comparable to coffee out of it. Sweetening it was a European tweak made many centuries later." ]
[ 11 ]
[ [] ]
[ "url" ]
[ "url" ]
cmbgis
What does it mean when a country like China devalues their currency (in this case the Yuan)? How does that mechanism work?
Economics
explainlikeimfive
[ "ew14ix7", "ew1skby", "ew16ay1", "ew1hfl4", "ew18p9p", "ew1bcjy", "ew1m3bs", "ew1xped", "ew2vb4b", "ew2bl75", "ew3a2n4", "ew1y084", "ew2vzfl", "ew2hfcp" ]
[ "Imagine you started a country, Boilerville, and printed 100 Boilers Bucks. You do this because you stashed some a lump of gold somewhere, so each B.B. is worth 1/100 of the gold lump. People would start using that money for trade, investments, saving, etc. There might be times where people decide it’s a bad time to invest and your economy slows down as people hoard their money in savings. Why shouldn’t they? Each B.B. they have is 1/100 of the gold lump so there’s no harm in holding onto it, the value isn’t going anywhere. Eventually, the lack of investment starts to hurt your economy. As the ruler of Boilerville, you are under pressure that the economy isn’t growing because people aren’t investing. So you decide to release 10 extra B.B. without increasing the amount of gold you’ve stored. Suddenly, each B.B. is 1/110 a lump of gold and hoarding your B.B. is a bad strategy. So the hoarders decide to invest their money so they can at least have as much value as they might have lost. This is a gross oversimplification why most currencies are controlled to slowly devalue over time. Edit: this is gaining a lot of attention so I should bring some things up: “Devaluing” currency typically refers to international trade. Let’s expand my example and add another country Neighbortown with their currency Neighbor Nickels, which are also 1/100 a lump of gold. Devaluing can be good for a few reason: When we turn the value of a B.B. to 1/110, Neighbor Nickels haven’t changed value in terms of gold. Now one N.N. is worth more than a B.B. ...At first this seems like a bad idea for Boilerville, but it has other effects. The citizens of neighbortown now use their valuable money to buy things at a cheaper price in Boilerville. This helps the people of Boilerville because they’re doing more business. In economic terms, it raises Boilerville’s exports and Neighbortown’s imports. Let’s also say some businessmen of Boilerville borrowed money from their friends in neighbortown last week, before the devaluing. In their contract they said “give us 10 B.B. today so we can invest it and we’ll give you 11 B.B. next week with interest”. This seemed like a good idea to the neighbortown businessmen because they thought they’d make some money so they agreed. But, after the change, B.B.s went from 1/100 gold to 1/110 gold... and now the neighbortown businessmen got back the same amount of value they initially sent. By devaluing currency, debts shrink. Imports, exports, and debts are all very important in international trade." ]
[ 9094 ]
[ [], [], [], [], [], [], [], [], [], [], [], [], [], [] ]
[ "url" ]
[ "url" ]
88wc90
How can racing games tell milliseconds of difference apart in chronometers, while locked at 30 or 60FPS?
I was playing Forza the other day, when I did a 1:37.344 around a track, and the guy ahead of me in the leaderboard did 1:37.343. How was it possible, considering the game runs at 60 FPS? Wouldn't it need to run at 1000 FPS, a frame at every millisecond, to be able to tell such a small difference apart?
Other
explainlikeimfive
[ "dwnphwr", "dwnpull" ]
[ "The cars continue to move between frames. The computer only shows you the car positions 30 or 60 times per second, but the position is calculated far more often than that." ]
[ 26 ]
[ [], [] ]
[ "url" ]
[ "url" ]
n13rvu
How does a battery company produce say a double A battery that's better or worse than a competitor if it's the same thing?
Do generic products just like add less juice and more popular ones add more or something?
Engineering
explainlikeimfive
[ "gwajhhf", "gwajmgb", "gwalr8u" ]
[ "Firstly there are several different chemistries that are used in AA batteries. Some are more expensive and have higher capacity than others. The consider that a battery is not just a pot of chemicals. There are various components including a carbon anode, separator, exterior can etc. The quality of these affects the capacity and internal resistance of the battery. Edit to add: rechargeable batteries have even more variation because the robustness of different geometries to repeated cycling is not trivial to optimise." ]
[ 27 ]
[ [], [], [] ]
[ "url" ]
[ "url" ]
a3ag8c
How is it that languages that developed closely geographically, can be so different?
For example, French and German, or English and Gaelic. These languages developed so close together yet have little in common. Wouldn't it have made sense for ancestors who spoke the root languages to converge instead of diverge? p.s. Tagged as culture since that felt like the best fit, since language is such a big part of culture. Let me know if I should change it to other.
Culture
explainlikeimfive
[ "eb4lxq9", "eb4mua9", "eb4ppvr" ]
[ "French is derived from Latin which was brought to the region via Roman Conquest. Germany was not conquered and so kept its tribal language roots. Likewise English is derived from the High German spoken by the Angles, Saxons, and Jutes who conquered the Island taking it away from the Celts. Both French and English have remnants of the earlier Celtic languages bobbing along in them but they are primarily the language of their conquerors." ]
[ 8 ]
[ [], [], [] ]
[ "url" ]
[ "url" ]
cbqssa
We do we sometimes not crave specific foods, but at other times we crave that same food?
Like if right now I want some Taco Bell, but on a different day Taco Bell’s sounds disgusting.
Biology
explainlikeimfive
[ "eti092x" ]
[ "It all comes down to what nutrients your body needs. Take an orange, for instance (not the best stand-in for a taco, but it'll work.) Oranges are high in Vitamin C, so if your body starts running low on Vitamin C, that orange you pass in the grocery store is suddenly going to look *really* good. If your body really needs fat and salt, you're going to be rushing for whatever's the closest source of fat and salt, even if you don't feel that hungry. The same goes for protein, sugars, any vitamin or mineral, antioxidants, folate, or anything else your body needs. It's even true with water; if you're slightly dehydrated but you don't feel thirsty (like an astonishing number of people in the US today,) and someone sets down a glass of water and you take even one sip, that water will be gone before you have any idea what just happened, because your body knows that it needs it. That's also why pregnant women have such bizarre cravings; they're building a human, and as soon as they need some different building blocks to work with, their bodies start screaming for something that has that thing in it (like pickles and milk duds, which is one that I heard that might be apocryphal.) That's the normal way that cravings work, and it's the way yours likely works assuming that Taco Bell doesn't put anything in their food to increase the addictive appeal of it. But, nah, all fast-food places are upstanding and honest, right? No one puts crave-inducing agents in anything they're trying to sell a lot of.... Nope, not ever." ]
[ 5 ]
[ [] ]
[ "url" ]
[ "url" ]
738c5f
how exactly does pepto-bismol cure my nausea, heart burn, indigestion,upset stomach, diarrhea?
As I am currently sitting on the toilet experiencing the after affects of a potluck dinner, I took some pepto bismol chewable tablets to soothe my stomach ache and got a bit curious. I know that Bismuth Subsalicylate is the active ingredient that calms the system, but what is the chemical reaction happening in a stomach when pepto is taken. How does pink do more than I think?
Chemistry
explainlikeimfive
[ "dnof2za", "dnoncb4" ]
[ "I am not a doctor or pharmacist, but someone who has taken lots of Pepto and has researched this out of curiosity. Basically, most of those symptoms are caused by an inflammation in the digestive tract. Bismuth Subsalicylate, the active ingredient, helps reduce that inflammation. I say most because as I understand it, we don't really know why it works as an anti-diarrheal. Usually diarrhea is caused by your system flooding your intestines with extra water to attempt to cleanse itself. So it could be the case that Pepto helps your intestinal wall reabsorb that extra fluid. [Source]( URL_0 )" ]
[ 19 ]
[ [ "https://www.drugbank.ca/drugs/DB01294" ], [] ]
[ "url" ]
[ "url" ]
6o98dt
Why are commercial airplanes all sub-Mach 1?
Engineering
explainlikeimfive
[ "dkfk44i", "dkfj8do", "dkfliph", "dkfk5h5", "dkfp3q8" ]
[ "The faster you go, the harder it is to push through the air - and the relationship is not linear. So, going a little bit faster needs a LOT more power which means more fuel, bigger engines, more noise, etc. etc. Put your hand out of the car window at 30mph - easy. Now try 60mph - wow, the air is a lot more forceful! Now try 120mph (OK, don't really) you can't hold your hand up, the air is like a brick wall. At 600+mph you can imagine it's not easy! If you look at Concorde, it's a tiny cramped thing that burns massive amounts of fuel, which makes it expensive to run and you can't fit many passengers on it. Additionally, stuff happens the faster you go - stuff heats up, shockwaves happen, the whole airplane has to be made to withstand the extra forces & strains, lifespans of components get shorter, stronger stuff is heavier and bigger, etc. etc. *Please don't put your hand out the window and then sue me because you hit something*" ]
[ 39 ]
[ [], [], [], [], [] ]
[ "url" ]
[ "url" ]
6wxsjg
What is our (The world? UN? Canada?) stance on Space Aliens?
I did a google search, but all I found was a newspost from a site i'd never heard of saying UN for outer-space was thinking of making plans for first contact. Was that ever completed? Specific things I'm wondering about, if there is a lot on the subject 1: What will our official first response be? Friendly? Defensive? 2: Any plans on attempting to communicate? 3: What if the aliens consider Earth to be in the alien's territory? Do we try and claim sovereignty?
Other
explainlikeimfive
[ "dmbmqdn", "dmbof4a" ]
[ "First of all, I think two things need to be pointed out: 1) There are most likely aliens somewhere in the universe because of the size of the universe. 2) Again, because of the size of the universe, it is extremely unlikely that we will ever encounter aliens. I.e. life is probably extremely rare in the universe, but the universe is still so large that there is probably a lot of other life in it. Just nowhere even remotely near us. Now, as far as I remember, we have sent out stuff into space with messages in all kinds of languages and codes. Essentially a \"radio\" that broadcasts stuff for as long as it doesn't break. But the chances of this thing ever encountering anything? Almost nonexistent. Because of the low probability of ever encountering aliens, we have not generally made up any plans for how we would react to them. Of course we would try to communicate and the first response would probably be friendly, assuming the aliens aren't openly hostile. Making plans for an alien encounter would be like making plans for a snowstorm in Sierra Leone. It is assumed to never happen, so it is kind of pointless." ]
[ 5 ]
[ [], [ "https://www.youtube.com/watch?v=JDuqZbjxB_E", "http://www.dailymail.co.uk/sciencetech/article-1315336/United-Nations-appoint-space-ambassador-act-contact-aliens-visiting-Earth.html", "http://www.dailymail.co.uk/sciencetech/article-1037471/Apollo-14-astronaut-claims-aliens-HAVE-contact--covered-60-years.html", "http://www.slate.com/articles/news_and_politics/explainer/2010/07/if_mars_attacks_.html" ] ]
[ "url" ]
[ "url" ]
8cigcv
Why do hot drinks taste “hotter” after eating a spice like ginger or pepper?
Other
explainlikeimfive
[ "dxf8cra" ]
[ "I'm not sure if 6-Shogaol, Zingerone, and Gingerone, the compounds in ginger responsible for the feeling of heat, work in the same was as capsaicin, but I do know how the latter works and will go off the assumption they do but to a lesser degree. How it works is by lowering the temperature threshold for the heat sensing nerves in your mouth to fire. What this means is that lower temperatures than normal will \"trick\" the nerves into telling your brain that you are experiencing a hot temperature. When we eat foods with capsaicin in them, whats actually happening is the heat of our own mouths is making us think that our mouth is burning! If normal body temperature is enough to make your brain think \"Oh crap, whatever is in my mouth is super hot\", imagine what it does for substances were actually hot in the first place." ]
[ 3 ]
[ [] ]
[ "url" ]
[ "url" ]
dgq21o
How was the electron beam in CRT televisions aimed and moved with such speed and pinpoint accuracy?
Technology
explainlikeimfive
[ "f3e0g5k" ]
[ "This is really interesting, actually. The timing was driven by the 60hz ac power supplied to the TV set itself (50hz in PAL countries). Analog circuitry took this timing and, in conjunction with the analog radio waves received, scanned lines and frames (called fields)." ]
[ 4 ]
[ [] ]
[ "url" ]
[ "url" ]
60txku
Why in the 80-90's were there marketing campaigns for commodities or industries at large, e.g. pork (the other white meat), (the touch, the feel of) cotton, (got) milk, and beef (it's what's for dinner)?
Other
explainlikeimfive
[ "df99r0r" ]
[ "The industries that farm, produce, and sell them generally have an association where these producers cooperate; promoting a commodity benefits all of them. A single farm or a meat packing plant or a distributor can't advertise to consumers since consumers never buy directly from them." ]
[ 6 ]
[ [] ]
[ "url" ]
[ "url" ]
6erxok
How come Queso fresco will not melt like other cheeses?
Chemistry
explainlikeimfive
[ "dicsgli" ]
[ "URL_0 Cheeses made with rennet melt, while cheeses made with acids don't." ]
[ 9 ]
[ [ "https://brooklynbrainery.com/blog/when-cheese-doesn-t-melt" ] ]
[ "url" ]
[ "url" ]
izazoq
Why is Nvidia buying ARM? Why is ARM so important, and why aren't other companies interested?
Like the title, I've heard a lot about Nvidia's purchase of ARM. Why is ARM so important and what does it do? Why aren't other, larger companies trying to buy ARM?
Technology
explainlikeimfive
[ "g6hu2es", "g6hua1h", "g6i5isx", "g6i2uqs" ]
[ "ARM licenses the intellectual property for a line of small, low power microprocessor cores. They are used in most cell phones and tablets today. They are also starting to be used in server farms, because heat is a big deal in that application and their processing power/watt is good. A lot of companies wouldn't want ARM because they are incredibly expensive. Some companies wouldn't want it because if they owned ARM then other ARM users would bail and look for other solutions, making it much less valuable. Nvidia has great processors for graphics and artificial intelligence, but no general purpose processor. Until now. They can't really get into the x86 market, but unless you want to play in the PC space that isn't necessary. Having ARM gives them a full IP set for a lot of applications that are going to be big. They will also not only get the licensing revenue from other people using ARM, but they can also fuck over potential competitors." ]
[ 26 ]
[ [], [], [], [] ]
[ "url" ]
[ "url" ]
5od03j
why do people like to watch pimples being popped?
Biology
explainlikeimfive
[ "dcishn8" ]
[ "I guess it's because we need \"resolution\". For instance in music, you can't leave something tensed : after tension, you need a resolution. Same with your body : when you have something that hurts a bit when you touch it and you KNOW you could juts pop it, drain the pus and it would be fine, you do it because it releases the tension. Now, because you KNOW how it works with your body, when you see it in someone else's body it creates a tension : you see that white spot that is JUST ABOUT to burst and that creates a tension that you want to release, thinking \"if it was me, I would have popped that fucker a long time ago !\". So seeing someone do it brings a resolution to a tension and it soothes the watcher." ]
[ 3 ]
[ [] ]
[ "url" ]
[ "url" ]