Split (3)

train · 273k rows

title stringlengths 0 299	text list
How does the strength of a currency work?	[ "The exact numbers aren't really that important. Just because you can trade $1 for 114 yen doesn't mean that the dollar is stronger or weaker on its own. You need to look at the ratio over time. If five years ago you could trade $1 for 50 yen, then the dollar is now stronger or the yen is now weaker, because you ne...
What does Russia (and other countries) gains from being part of the G8?	[ "G8 is basically a meeting of the most important industrial Nations to get together talk strategie make deals... So everyone benefits who is part of. But as far as I know it is less formal than the G20.", "Its a lot like a parent teacher association meeting (PTA). They go to talk about official issues like fundi...
the importance of landing a rocket on a barge	[ "You can launch it again without having to build a new one, or clean salt water residue out of it. It reduces the cost of going to space by a lot.", "The specific importance of the barge is saving tremendous amounts of fuel.\nrockets don't propel straight up from their launch pad. After launch they rotate anywher...
Why do we get dizzy when we spin around?	[ "Your orientation in space is detected by fluid and calcium deposit movements in your inner ear. When you spin around and then stop, the fluid and stuff in your inner ear keep moving for a little while. (like how water in a cup keeps moving after you stopped stirring it).\n\nSo your inner ear is telling your brain ...
Planets that are gas giants.	[ "Gas giants keep their form the same way rocky planets do: gravity. But unlike Earth with its separate air and ocean, there are no concise borders between gas and liquid, or liquid and solid on gas planets. \n\nIf you were to travel into a gas giant, you would notice gas in the atmosphere gradually thicken as you t...
Why do people try to time pictures instead of taking a video and capturing the parts they want?	[ "Pictures will typically have a higher image quality than frames of a video would have. Videos will often use the fact that we can't distinguish detail as much in a video as we can in a still.", "Most video cameras are 1080p and 30fps. \n \nLet's take an 8MP camera, which means you get a 16:9 2.1MP image instea...
Why are places such as dentists' offices and banks only open when most of their customers are at work?	[ "Dentists: Because they're in demand enough to make you come to their preferred hours. If the US for some reason suddenly got 100 million more dentists (that couldn't swap jobs), you can probably expect more flexible hours.\n\nBanks: Joe Schmoe depositing and withdrawing his rent aren't how banks make money. Mo...
How do space ships, which are not so much larger than cars, preserve/contain the fuel needed to travel countless AU away, and preserve/contain the electrical power needed to snap images and send them back to Earth?	[ "[slate](_URL_0_) has a pretty good article on this, in regards to voyager-1.\n\nthe tl;dr is that it doesn't move like a car at all. it doesn't need to keep its engines running - it's propelled by its own inertia, which it got from us launching it and the gravity assist that slingshotted it around jupiter and satu...
Why does the congress pass a bill on the condition that the Senate has to fail it? Why not fail it in congress itself?	[ "You're likely taking about the Senate passing a bill on the condition that the House would fail it. Congress is actually a term that can describe either, or both, of those sections.\n\nAnyways, it doesn't make a lot of sense. My understanding of why somebody would even consider this is Senate rules require bills...
Why is did mike trout sign a deal for 1 million dollars in 2014 if he is arguably the best MLB player?	[ "He's a pre-arbitration player, meaning he has less than 3 years in the league. Pre-arbitration players don't get to shop around to different teams, they just take what their team gives them (minimum $400,000) or they don't play.\n\nHaving said that, $1M is the most any pre-arbitration player has ever earned, so i...
How does radium store light?	[ "Radium can only really be said to \"store\" light in a very roundabout way. Like all heavy elements, it was formed in the vast stellar explosion of a supernova; that's where the energy came from that is now being emitted as light. \n\nRadium is a radioactive element - it gives off radiation. This radiation can hit...
Aside from the NSA spying, which we've all known or at least suspected for many years, how has Obama messed up?	[ "Disenchanted former Obama supporter here. \n\n* His failure to punish any of the illegal shenanigans that crashed the economy\n* His failure to punish any of the illegal shenanigans that occurred in the previous administration, especially with regard to torture\n* When it comes to civil liberties, it's not an exag...
why it takes longer to search my windows computer for a file than to google something.	[ "Indexing. Google has a huge, highly optimised database designed for the sole purpose of searching quickly. Even with indexing switched on, your computer doesn't have anywhere near as good a system.\n\nSpeed. Your query to Google is dealt with by an extremely fast computer - many times as powerful as your home PC. ...
How a diet of grass, hay, bugs and other things in a pasture can turn cows into huge animals made of protein, fat, and make rich milk.	[ "plant cells have a bunch of protein. but it's not digestable by humans. cows eat 25 pounds of hay a day. and they chew that 25 pounds over and over. and then swallow it and digest it in their stomach. then throw it up and chew it again and again. then swallow and digest it for the 2nd time...then 3rd..th...
"Prevent radiator boil-over, turn off air conditioner." How does that help when driving up a mountain pass?	[ "If your radiator is already close to boiling over, leaving the A/C on will cause the engine to do more work and generate more heat and push it over the edge.\n\nJust because it doesn't affect your vehicle doesn't mean it's not a problem for many others.", "* the A/C makes your car's engine work harder, which p...
When someone sues the government and wins, do tax payer dollars go towards the settlement? Do we pay for the actions of idiotic federal employees?	[ "Yes. Why shouldn't taxpayers have to cover it? They voted for the government officials whose job it was to keep the government from doing things it could get sued over.", "Police Officer here:\n\nAs long as I follow my training, agency policy, and the law, I have immunity against lawsuits. That's why you us...
What is the process involved in joining the EU?	[ "The prospective state has to meet economic and social benchmarks. If the state has trouble meeting them the EU will help if the state seems serious. After the state meets the benchmarks the state hold a referendum to see if domestic audience wants to join the EU. EU votes to let state in. BTW, anything EU is a hor...
Why do the mouths of wild animals (bear, wolves, lions, etc.) smell so bad in comparison to humans?	[ "cause they don't floss and brush their teeth. that bit of tendon that come from the racoon a week ago is still stuck between his teeth. same like when you eat beef stew and that one sliver of meat just got between your teeth. except you use a toothpick or floss or brush it out.", "If you didnt brush your ...
Baseball defensive positioning	[ "I'm not certain of the exact reason that 9 was settled on as the team size (especially given that cricket, which it's descended from, is 11 players per team), but if we work off of the fact that it is 9 per team, the preset positions simply follow along.\n\nPitcher and catcher are obvious, as you said, so that l...
Why do peoples voices go really high pitched or really deep when videos of them are sped up or slowed down?	[ "Sound waves traveling at different speeds produce different pitches.\n\nSorry, that's all I got", "Imagine this:\n\nWe shoot video of a metronome. It's making exactly 10 clicks per second, no more and no less. We shoot ten minutes of this video.\n\nWhen we play the video back, we hear 10 clicks per second for te...
Gravity and Depth.	[ "Acceleration due to gravity is given by mass divided by radius squared times G, the gravitational constant. \n\nRearranging gives: M = 0.5 * 9.8 m/s/s * (68500000 m ) * (68500000 m) * 10^13 / 6.67.\n\nFinal answer is about 3.45 * 10^28 kg for 50%, 4.48 * 10^28 kg for 0.65%." ]
Why is Hispanic/Latino treated as a race in the media and elsewhere?	[ "Race is largely a social construct in the country that defines it. In the US, people from Latin America and Mexico are seen to share enough biological, social, and physical characteristics to be considered a 'race'.\n\nIt's important to understand that while racial categories include an element of biology, they ar...
Why are the search results when googling an unknown phone number so terrible?	[ "I actually think google intentionally obfuscates results. Back in the day, googling phone numbers worked awesome. It was one of the first \"best answer\" things at the top of the page. \n\nQuite suddenly it stopped working." ]
What exactly is Neuro-linguistic Programming?	[ "think of it like a system to \"fake it til you make it\" and changing how you frame your thoughts. people try to deride it as pseudo-science, but it does actually work on some levels. feeling down about something? stand up straight and speak assertively, youll feel better, things like that. one of the things i too...
What is Obama's reasoning behind drones, and why can't the US just pull its troops out of the Middle East? What will happen?	[ "Drones are typically used to target militant commanders in the hard to access tribal regions of Pakistan. They allow the US to conduct recon in the area for longer periods without the risk of losing a pilot. Drones have also been used in Yemen to target the growing influence of Al-Qaeda in the Arab peninsula. \n\...
why does a car battery die if you leave your head lights on over night, but it can last no problem driving 12 hours straight/through the night with the head lights on and music playing?	[ "Because you have an alternator that powers the systems while the car is running.\n\nWhen the car is off, it's draining the battery.", "The battery is not being used to power anything while the car is running. It is only there to start the engine. Running the engine does not increase battery life to infinity. Whe...
How does "the shot" (birth control) last so long?	[ "If you want to look at metabolism and excretion of any drug, check out the pharmacokinetics section.\n\nFrom the article, I'd guess\n\n* Because it binds well to proteins in blood plasma, it's harder for the kidneys to filter out the drug (proteins don't enter the filtrate in the nephron [the filtering unit of the...
How do we know Dinosaurs weren't purple with yellow polka dots?	[ "Pigments have been found in some fossilised dinosaur feathers, so we know the colour of a couple of birdlike dinosaurs.\n\nThe rest is speculation, based on the reasoning \"if lizards are green and brown now, then they probably were then\".", "We don't know as much as we \"know\". Aside from a few fossilized p...
Why does most commercial airplanes are white painted and not a non-natural color ocurring in the sky (clouds)?	[ "Largely its for thermal protection. White reflects more of the sun, keeping the aircraft cooler sitting on the tarmac. \n(So why not leave the aircraft unpainted metal like American used to in the 80s?) Airplanes fly high enough you are marginally more exposed to radiation from the sun. Having a coat of paint prot...
How does anticipation alter my perception of the passing of time?	[ "Your perception of time comes after the time has past. If the whole way to a location you are constantly checking how much longer is left, you will remember a lot of the wait. On the way back, your thoughts are else where and you don't have as many memories of the ride.", "when you are in anticipation of someth...
Why is the Australian dollar so weak against the British pound?	[ "No, the Aussie dollar is pretty strong against the pound, currently sitting at 55 pence.\n\nIt is always a mistake to compare currencies absolute values, as these are a result of history. The difference in this case is because Australia switched to decimal currency back in 1966, and with currency being more valuab...
Instead of using voltage converters, why can't battery manufacturers create batteries to tailor the device? (or why is there no 5v battery but 1.2, 1.5, 9, 12, etc)	[ "The voltage a battery produces depends on the chemicals involved. A zinc/copper cell, for example, produces 1.1V. Doesn't matter how big or small it is, that's the voltage that you get when you make a liquid cell with those chemicals. A larger zinc/copper battery can generate more current than a smaller one, but t...
Why does it feel different to heat my home to 74 degrees than to cool my home to 74 degrees?	[ "There is a big difference, and that is the temperature of your surroundings - walls, floor, furniture etc. The air may be 74degrees, but the surroundings may be colder or hotter.\n\nWhy that matters is due to mechanisms of heat transfer. There are two ways how heat does transfer: \n1. by conductivity - when objec...
Why do humans get the same flu? Don't our bodies make an antivirus?	[ "\"The flu\" is just a very broad term for the actual Flu Virus. There are many strains of it and it is very very good At evolving and changing itself. We have flu shots which are essentially a flu vaccine for whatever flu strains they think are going to be the biggest danger that flu season. As time goes on the vi...
How do build updates work?	[ "When you write software, you write a program in human readable text (source code). That text is fed into a program (compiler) that turns it into an executable that a computer can actually run.\n\nLarge software projects can have hundreds, if not thousands of source files worked on by a large number of people....
How fast does new fat form after you've eaten a big meal?	[ "I'll answer your original question...\n\n12-24 hours and you'll have stored the excess calories as fat. Depending on the source of those calories (sugars are processed fast, then things like complex carbs and protein take longer with fat taking the longest to digest) the amount of time it take for your body to br...
How does charging a phone for too long make the battery life significantly shorter?	[ "In modern phones, it doesn't. They have smart systems that stop charging at 100% and let the battery drop some before charging again. It keeps the battery from being damaged. But phone batteries do like to be \"exercised\" and discharged down to 20 or 30% and recharged from there.", "If you tried to charge a 100...
Who actually "owns" hospitals	[ "Depends on the country. \n\nIn the US, it could be the gov't, non profit organizations, or for profit companies. I know no reason why Disney couldn't own a hospital, and I would bet they have several clinics and other medical centers on their properties and cruise ships. \n\nHow about others:\n\n- Government: t...
Exponential functions	[ "/r/homeworkhelp would beuch better suited to help you out here." ]
Why do we feel weak when we haven't eaten?	[ "Once your body kicks into starvation mode (which varies in onset time per individual - for super skinny/low caloric intake folks it can be as low as 8 hours, but on average its around 12-16), a lot of hormonal changes start. Your liver and muscles start consuming glycogen (sugar) stores, and then start metabolizi...
If protein is what builds muscle, why do we need to eat at a caloric surplus?	[ "Your body can convert proteins into glucose. If you are in a caloric deficit, then this will be going on. Proteins turned into glucose is protein that cannot be used for muscle. Having a caloric surplus ensures that you do not have a caloric deficit, so very little of the protein gets turned into glucose, so it ca...
What's a "Basic Bitch"?	[ "Mainstream; kind of the opposite of a hipster. The typical Basic Bitch is the Ugg and yoga pant wearing girl in her 20s with a Starbucks coffee.", "Kinda seems like just a female obedient consumer. Likes what she's told to like, buys what she's told to buy. Dead center of the bell curve, biggest marketing target...
- If intelligent life visited Earth, how would we communicate if we assume the scenario that they spoke another language?	[ "Math! It doesn't matter what you speak (or if you even speak) as intelligent beings one must understand that if you have one thing, and then you have another thing, you must have 2 things. And since we would have the common base line, we can derive everything else. \n\nNow they probably wouldn't have numbers like ...
Waves	[ "Waves are the movement of water due to the oscillation of water molecules. It can be by the frictional drag of wind over the water's surface, moment via earthquakes, or the displacement of water by things like boats. Generally if displaces by a boat we call them wakes, but they are still forms of waves. \nWaves ...
When someone tells you to see "a doctor," how do you know which kind?	[ "Typically, you'll go to your main doctor, who is a General Practitioner. They're the general \"doctor,\" who have a wide knowledge of many medical things. \n\nIf that doctor sees something wrong, they might refer you to a specialist. Specialists are doctors, too, but they have a very deep knowledge of a fairly l...
How does the Volkswagen exhaust gas scam work?	[ "From what I have read (I have a 2013 Golf TDI), VW knowingly added in a defeat device to their diesel vehicles to turn on the clean filtering system for the exhaust when monitoring equipment was hooked up to the cars. When the testing equipment is not hooked up, the cars give off emissions that are WAY above the l...
Why does being lazy feel so good? shouldn't we naturally feel better working?	[ "Being lazy means we're spending fewer calories. Which is good for an animal which may not get to eat. If you were that hungry, you naturally wouldn't be lazy.", "What we think of as lazy is often not detectable as lazy by our brains. Our brains want us to do productive things, and we've learned ways to relax th...
- Why aren't all of the months in numerical sequence from most to least?	[ "I'm not sure about this 100%, but this is how I understand it:\n\nOriginally, there were ten months. January and February were originally a monthless period because no crops would grow. This is why September - December are named the way they are (Sept = 7, Oct = 8, etc). So, February was the \"last\" month created...
Why does putting a wooden spoon over a boiling pot prevent the water from spilling over?	[ "It breaks the surface tension of the water before it spills over the edges.", "The spoon breaks the surface tension of the water, so bubbles can't form as quickly. It doesn't completely prevent water from spilling over, but it slows it down." ]
Water Loss due to Agriculture?	[ "You're right and wrong.\n\nThe water used in agriculture (growing that almond for instance) is not destroyed. Almost nothing we do destroys water permanently. The water participates in the plant's transpiration cycle, is used to build parts of the plant, and is released as water vapor into the atmosphere, where ...
What causes economic inflation?	[ "Demand causes inflation.\n\nPeople want things. Since there is a fixed amount of things, the price for those things goes up. This rising of prices is called \"inflation\".\n\nA low amount of inflation (1-3%) is considered \"normal and healthy\" for an economic, indicating growth of demand that is controlled.", ...
Why do strangers want to follow me on Twitter?	[ "They don't have an interest in following you, they're either ways of getting you to go to some site (like the latter group) or they're people who follow you in hopes you'll follow them so they can up their number of followers... for some reason this is valuable to people.", "Random companies:\nA lot of the time ...
Why do I get drunk easier at home?	[ "In the study of mind altering drugs, there is the idea that the effect of a drug is affected by the \"set and setting\". This means that people taking the same drug in different social situations (setting) and under moods or with different expectations (set) would feel different effects or different levels of effe...
How dog show judging works!	[ "There's nothing really the home viewer can watch for, unless they are experts of a certain class of dog. \n \nBasically, each breed of dog were bred to perform a certain function which separates the different breeds into classes.(Herding dogs, toy, sporting, etc). Each judge looks for certain standards defined ...
How is it at all possible that a criminal could sue if they get hurt in the process of trying to steal/commit crime?	[ "The frequency in which is happens is highly overstated, and even when a lawsuit is successful, it is usually overturned on appeal. Criminals actually seeing a dime from a lawsuit like this is very rare.\n\nI can think of two situations where the criminal might have a case:\n\n* A non-criminal could have hurt in t...
Why does diarrhea need to come out RIGHT F*CKIN' NOW, but regular poo is cool to chill for a lil bit?	[ "Because you only get the urge to poop when the feces pushes on the internal anal sphincter. Most of the time, feces is stored in the descending portion of the large intestine, far away from the sphincter, but every once in a while, intestine muscles will push the feces into the rectum where it will push against th...
How do atomic clocks work and why is their time considered the most accurate?	[ "Clocks work by performing some timekeeping process (advancing the hands, changing the numbers, etc.) in a way that is linked to some physical process. For a sundial the relative motion of the sun across the sky moves the shadow to track time, for a grandfather clock a moving pendulum causes the hands to move, for ...
this may belong in an NFL subreddit, but: In the NFL, why do kickers for a field goal have a hard time getting it 50 60 yards when they routinely kick more than 70 80 yards for kickoffs?	[ "On kickoffs, they're kicking off of a tee, they're not being rushed by the opposing team, and they're only trying to keep the ball within the sidelines. \n\nFor a field goal attempt, their run-up to the ball is only three or four strides because otherwise the kick will be blocked, the ball itself is being stood up...
How do bank stress tests work?	[ "Basically, they take the bank's account/spreadsheet info and run some simulations - stuff like \"what if 10% of your customers default on loan payments?\".\n\nThese simulations are able to show whether the bank can cope with a mini-crisis, or whether they should have more money reserved for a mini-crisis.", "Mos...
Why is it common for bears to be hit by trains?	[ "Oh there is a simple explanation for this. Bears are the king of their land. They grow up being able to fight and kill anything in there area. Think about. Ever try to fight a bear? You will lose. It is a matter of pride to defeat any foe before them. Eventually some mature veteran fighting bears will run out of v...
what is Modernism and what is Postmodernism	[ "You've opened a whole can of worms with this question, as there are lots of different possible answers, and Modernism and Postmodernism overlap and interact to the extent that some people question whether Postmodernism is a thing. \n\nModernism, starting off at the turn of the 20th century, is art and creativity a...
Why does the urge to pee increases the closer you come to your home?	[ "It’s psychological. Compare it with craving a cigarette. You want it more if you see a person smoking, hear the word “smoking”, or get a random association with the act (a trigger). Getting closer to home makes you think about peeing, which increases the urge." ]
If my parents had sex to conceive me 3 hours earlier than they did, would I have then been born 3 hours earlier?	[ "There's more of a chance of you not being you than anything else.", "No pregnancy is exactly 41 weeks long down to the hours and minutes." ]
The Great Filter	[ "It's an answer to the Fermi paradox, which asks the question why we haven't seen vast colonization if life had developed on other planets. The great filter theorizes that there may be some kind of barrier preventing species from transcending their own civilizations and colonizing other worlds, such as resource dep...
Can someone explain grade deflation/inflation?	[ "The other post did a good job of explaining what, now the question is why. Some of this is simply like monetary inflation- grades creep up slowly over time as students, professors and administrators come to accept a \"new normal.\"\n\nIn some cases, a administration might pressure a professor to make his gradi...
What is Guantanamo Bay, and why is it bad?	[ "When people refer to Guantanamo Bay, they are referring to the Guantanamo Bay detention camp, located in Cuba, that is controlled by the United States. The camp is used to hold enemy combatants who are said to be a danger to the United States.\nA large number of people are angered by the existence of this camp as ...
why do some rap artists have 'skit' tracks on their cd's?	[ "So everybody knows that Paul Rosenberg has Slim's back", "Just another chance to be creative. Consider that hip-hop is more theatrical than most other styles of popular music. Rappers write in character a lot, or at the very least they put more emphasis on stage persona than other musicians. They also rely more ...
How can companies in China or otherwise offer free shipping on purchases, yet it costs me over $30 to ship internationally?	[ "China's shipping company China Post is highly subsidized by their government, and is not competed with. China Post and USPS have a deal with ebay that makes this even cheaper.\n\nFor more insight check out [this Quora thread.](_URL_0_)" ]
Why does global warming cause the sea levels to rise, if water takes up more space as ice anyway?	[ "Two factors. One, ice on land is melting, and that water runs downhill into the ocean.\n\nTwo, and more important, while ice takes up more space than an equivalent amount of water, warmer water takes up more space (expands) than cooler water. The contribution of ice in the ocean 'shrinking' as it becomes water, is...
What happens that causes the "shock" feeling when you eat something sweet after not eating for a while (assuming this happens to everyone)?	[ "Not sure exactly what you're referring to--is the shock feeling kind of like a sudden sick feeling? This can happen due to lack of protein; it happens to my brother often when he has a lot of carbs for breakfast (pancakes, cereal, etc) but no big source of protein. He's usually fine for a while, but the next time ...
What's the difference between the ("th-uh") and the ("thee")?	[ "There is no meaning difference. They are both the same word. It is just different pronunciations. Most of the time \"thee\" is going to be used before a vowel sound and \"thuh\" otherwise (\"thee\" egg, \"thuh\" boat).\n\nPeople also use the \"thee\" pronunciation before non-vowel sounds to indicate emphasis on th...
Why do old people get disturbed by loud sounds when, in fact, they have much weaker hearing capacity?	[ "When hearing loss due to old age starts it is usually high pitched receptors that fail first. So it is harder for them to hear normal speech but they can still hear lower frequencies. So a loud noise that has a deep resonance can still be irritating. Imagine listening to a top of the line surround sound system whe...
Why is it when I have a cold or flu, I sometimes feel really cold and start shivering violently, even though when I feel my skin I'm warm?	[ "This is a side effect of fever. Your body temperature is above normal, but your brain wants you running hot in order to help kill the infection, so encourages you to seek warmth. This is on top of the fact that because of your increased body temperature, surrounding air feels that much colder compared to your sk...
How does Darcy Oake's do these (magical) illusions?	[ "Sleight of hand and misdirection. \n\nHe has you focus on the feather and the fire, while his other hand reaches into his jacket and pulls out a dove. He's got four doves, a little other bird, and an egg there. In his right sleeve, he has a collapsible wire cage that can expand quickly when you pull on the top ...
What is actually going on when you hit your funny bone?	[ "You're hitting the ulnar nerve, which is a big honkin' nerve that runs down your arm. Most of the time, it is cushioned beneath lots of fat and muscles, but at the elbow joint, it is exposed and relatively close to the surface of your skin. As such, it is vulnerable to impact which makes your arm feel all tingly a...
. Why are moths attracted to light?	[ "*Artificial light is a recent arrival on the night scene. Until recently, the only night-lights were the moon and the stars. Being at optical infinity, their rays are parallel, which makes them ideal compasses. Insects are known to use celestial objects to steer accurately in a straight line. The insect nervous sy...
what is quantum internet and why is it so important?	[ "Ok, I've been reading some comments that are just plain wrong or overly complicated, so I'll try my best to ELI5 Internet, encryption and quantum physics and one spot.\n\nImagine you want to send a very important letter to your friend Bob, only he may read it, but you don't really trust your mailman, or the post o...
How is the White House over 200 years old but still able to keep up with modern security standards?	[ "It has been updated and renovated on several occasions since it was last burnt by the British." ]
Right-hand or Left-hand dominance	[ "Probably the simplest (accurate, but not complete) explanation for a 5-year-old is that when you're a baby you figure out how to do something with one hand, and so you keep doing that thing with that hand instead of trying with the other. Then when it comes to doing more things, you're just more used to using that...
Why can you download entire YouTube videos by copying/paste the URL into a website but not do the same with Netflix?	[ "Netflix has protections in place to prevent this, since its content is 100% copyrighted. YouTube, on the other hand, is not always such sensitive material and therefore doesn't have as much security against downloading its content." ]
Why do tears come out while yawning when we are really tired?	[ "When we open our mouths to yawn, the muscles around our eyes put pressure on our tear ducts; when the yawn is particularly wide, the pressure is great enough that our facial muscles literally 'squeeze' tears out of the ducts." ]
If Almonds contain all of the essential Amino Acids to form complete proteins, why are they considered incomplete protein sources?	[ "Technically yes you could eat 1000 calories worth of almonds to reach your essential amino acid requirement across the board. However it is much more reasonable to combine almonds with a grain which is higher in methionine and leucine, this is called complementary protein intake. So when they are talking about a c...
ELI: Why are sales taxes only enforced when shopping stores and online?	[ "You are.\n\nYou are supposed to write the person a receipt, which they then show while registering the vehicle, and then pay the tax there in order to have ownership transferred to them." ]
Is burning fecal waste beneficial in one way or another such as generating power to using the ashes as fertilizer?	[ "One of best things about burning the waste is that you've reduced it's volume, so it's easier to transport and store, and it's probably safer than it was before burning. Regarding other benefits, if the waste is dry enough you can generate power from burning it (otherwise it's wasted for evaporating the water) and...
If Flash Storage is so useful, why do we still use Hard Drives?	[ "USB flash drives average $1 per gigabyte. Magnetic hard drives average 5.3 cents per gigabyte. Additionally, a magnetic hard drive is typically 2-4 times as fast as a USB flash drive, or even faster. USB flash drives also have write limitations; there are only so many times you can write to them.\n\nIf we're talki...
What are the pros and cons of mp4, webm and HTML5 video formats? When to use one over the other?	[ "None of them are video formats.\n\nMP4 and WebM aren't video formats, they're \"container\" formats. A container is just like a box you toss multiple kinds of data into to keep them all in one place -- kind of like a zip or rar file. When you have a video file, you usually have the video stream, audio stream, chap...
EIL5: What's the real difference between AA, AAA, 9v, D, etc. batteries? And why did Dildos/Vibrators take only C's for so long?	[ "AA, AAA, C, and D batteries are all 1.5 volts. But they differ considerably in the amount of current and time they can produce. A bigger battery can produce more power over time.\n\nA 9V battery is just that - 9 volts. But it has a lower current throughput.\n\nAs for why a vibrator takes a C battery I can only con...
What really happens when people die of "old age" or "natural causes" ?	[ "what happens is the family and doctors agree it is not worth determining what the actual cause of death was.\n\nactual cause is often heart failure, but frankly could be almost anything that isn't blatantly obvious from an external inspection.\n\nedit: stroke is another common cause. may actually be even more comm...
- what is the "nails on a chalkboard" sensation?	[ "We don't exactly know, but there are some good ideas on it. \n\nThe most prevalent theories say that the sounds which cause this reaction (nails on a chalkboard, fork on a plate, ect) do so for reasons related to evolutionary biology. Specifically, the sound has strong similarities to some warning calls given by c...
Why why when Russia invade a country all the people from america stand up shouting for violation of right of Sovereignty and why when the US do the same American people show a lot of support ?	[ "Let me explain it to you:\n\nThe US is the bestest most amazing country ever in the history of the universe. We were singled out by god to be mankind's only hope, a shining example of awesomeness that every other country on Earth envies and wishes they could be like. Therefore, anything we ever do is by definition...
Why it is more common for men to go bald	[ "It's the male hormone testosterone that does that and since women don't have that much of it men goes bald and women don't. The less hair you've got the more testosterone you have in your body.\nBald men usually have higher levels of testosterone than in women." ]
the theory that cutting taxes on the rich increases overall tax revenue	[ "Imagine if the govt taxed everyone's income at 100%. Although the rate is very high, the tax revenue they'd get from it would be $0. This is because when people don't get to keep any of their earnings, they won't bother to work. So we can see that in this situation a \"tax cut\" would certainly increase tax revenu...
How would you go about making metal tools from scratch? Assume you're stranded on an island and can only use what nature has given you.	[ "you should watch this video, this guy decided he was going to make a toaster from scratch.\n\n_URL_0_", "Well first off if your stranded on most islands you are out of luck since most wont have the resources you need to start. You are not looking for anything in dirt you are looking for certain rocks that contai...
What’s bad about dystopia if everyone lives in the society truly think and feel they are happy?	[ "If they are truly happy, I'm not sure it can be a dystopia. If it's enforced/artificial happiness, then you're encroaching on people's free feelings." ]
Why do some men find it attractive when women swallow semen?	[ "Matters of opinion are not for ELI5. Try /r/askreddit" ]
Why can't we make cheese from human breast milk?	[ "There’s no reason we can’t make human milk cheese in theory. A quick googling shows a bunch of stories about it and even a recipe. \nThe main reasons we don’t encounter it normally are two fold. First is the hygiene angle. There are a number of diseases that can be passed in breast milk. The second is supply. A wo...
Why didn't evolution decide our teeth can only be maintained through dental chemicals and treatment?	[ "During most of human history, we ate almost no sugars at all (hunter gatherer societies have very few sources of carbohydrates, i.e. complex sugars). It is carbohydrates and sugars that feed the bacteria that cases tooth decay (the bacteria converts sugar to acids, which dissolve the calcium in the enamel), and st...
Why can I switch between running programs instantly on quite old PCs whereas on smartphones, even the most modern ones, it always takes several seconds?	[ "There's something wrong with your phone if going from an app to another takes multiple seconds.\n\nIt is true however that mobile oses freeze the apps that are not active to save power.\n\nAnd phone apps are often fullscreen only because the screens are so small. If you actually need to multitask on the go, carry ...
How will the closing of so many Wal Mart stores affect local economies?	[ "Because the way WalMart moved in on those communities in the first place was to steamroll into town and undercut all local businesses, forcing them to go under. Pretty soon, WalMart becomes The Only Game in Town, and if it pulls out, all that's left is a big muddy hole. No local commerce, no local jobs, a huge hit...
can someone please ELI5 the functions of independent, dependent, and standardized variables in the scientific method?	[ "The independent variable is the variable that you control and change.\n\nThe dependent variable is what you're measuring. It changes as a function of the independent variable. Or at least it does if your experiment is valid.\n\nA standard variable is basically a validation of your experiment. It has a known set of...

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