Split (3)

train · 273k rows

title stringlengths 0 299	text list
What causes us to be pushed upwards into the restraint when riding an amusement park 'Drop Tower'?	[ "They aren't free fall. The carriage is actually being propelled downwards at first, which causes the passengers to be 'lifted up' in relation to the carriage.", "Some drop tower rides use pneumatic cylinders to propel the ride carriage down faster than gravity would take it. You, the rider, are in free fall but ...
Why did it hurt so badly when the anaesthetic was injected into my IV?	[ "I'm assuming you had propofol given to you for your anesthetic. A milky white fluid? The pain/burning is not unusual when administered in a smaller vein (relatively speaking). Different people have different sensations to it... from nothing, to slight tingling, to a burning, to outright pain... though most sensati...
Why do Americans say "twelve hundred" but not "ten hundred (rather than one thousand)"? What's the difference?	[ "Americans are lazy. We don't like having to say anything longer then we have to. Twelve hundred is faster then 1 thousand and 2 hundred. \n\n1 thousand is simple and fast, though. \n\nSo there's not anything really different other then one being faster then the other.", "[id·i·om](_URL_0_)\n\nnoun\n\n1.\nan expr...
Why are European police cars made to be extremely visible and American police cars made to be hard to spot?	[ "In my opinion its because European police want to deter illegal activity, while American cops want to be sneaky about their presence to fulfill their ticket quotas. There actually are laws on the books about how far away people are supposed to recognise police, but they are not enforced because the judges also be...
How can something hot burn one person and not another?	[ "The explanation is rather simple: We're all different. Some people can withstand more pain than others, some people can withstand low oxygen levels better than others, some people can withstand hot beverages better than others, some people can drink more alcohol than others before getting drunk, etc. It all boils ...
Why does "premium" 'cat food often contain fruit and veggies is cats are Obligate carnivores?	[ "Wild cats' prey are herbivores.\n\nCats often eat their smaller prey animals whole; so, when a cat eats a mouse, it in turn eats what the mouse has eaten - a small amount of grains, for instance.\n\n > So, for a cat, the consumption of fermented gut content from a mouse or rabbit aids in the management of the cat'...
Why are cold showers so uncomfortable compared to pools?	[ "They're both equally unpleasant to me, but if this is the case for you, I think it's for the same reason it feels colder when wind is blowing. In a still medium (water, air), you feel cold at first, but over time the temperature of your body and its close environment starts to equalize, making you a little colder ...
If "celebrity" priests, like Fr. James Martin, S.J., have taken a vow of poverty, as all Jesuits do, where do the profits from their books sales go? Charity? The church?	[ "The big misconception here is not all priests take a vow of poverty. This might have been a requirement of the Jesuits, but it is not a requirement of the Catholic church or most Protestant churches.\n\nSo the money goes to the celebrity priest in most cases." ]
What will happen to the body if you breathe 100% pure oxygen?	[ "It depends.\n\nIf it's at atmospheric pressure, you die from too much oxygen, although in short stints you'll be fine (max limit would probably be about 20-30 hours).\n\nIf the pressure is suitably low enough (so figure 70% atmosphere all the way down to maybe 15% atmosphere), you're fine, at least in the short te...
Sony just confirmed that ps4 used hardware based upscaling as opposed to software based? What's the difference	[ "Hardware is faster than software, which indicates the PS4 will have faster framerate than if it used software rendering.", "A hamster runs in a wheel. This powers all of the calculations for making the picture look pretty. The prettier it looks, the faster the hamster has to run. However, there is a limit on how...
Since bugs are attracted to lights why are there no land predators that use bioluminescence to attract bugs?	[ "[There are](_URL_0_). But the lights bugs are attracted to are usually quite bright, brighter than most reasonable bioluminescence.", "Probably because it is not possible for bioluminesense to be bright enough to trick bugs into thinking the sun is out, also the predator would stick out too much and something el...
Why is it that turning the oven up super high doesn't bake my food super fast?	[ "There's two main reasons why that doesn't work:\n\n1. Heat takes time to actually conduct through something. If you tried to bake a cake at 1000° for a minute, you'd end up with a scorched outside, but the inside of the cake would still be gooey batter. The heat just doesn't have time to move its way through the...
How do you go about opening/starting a school	[ "What kind of school? What sorts of subjects will be taught at this school? Where will the school be located? How will the school handle funding and revenue?\n\nDepending on where the school will be, there will most likely be legal requirements to start a school. There may also be \"accreditation\" organizations, w...
Why does hair in ones face and pubic region, grow faster than hair elsewhere on the body?	[ "Different areas of the body have different growth phases as well as resting phases. The hair will grow for a specified amount of time, this phase can be anywhere from a few weeks to years. The hair on your head has an average activation period of about 6 to 10 years, whereas your eyebrows only have an active phase...
How Does Electricity turn to movement?	[ "Magnets.\n\nElectric current generates magnetic field. In fact, electricity and magnetism are two faces of the same thing, thus it is often called electromagnetism.\n\nTo answer your question, your RC car has a motor with some permanent magnets plus wires wound up in such a way as to maximize magnetic field when c...
Can flowers be watered with blood? and will it have an effect?	[ "You can buy bags of dried processed blood as [fertilizer](_URL_0_). It has lots of useful nutrients.\n\nI'm sure there are plants that would be overjoyed to live in a rotten unprocessed coagulated mass of blood but it may be too rich and too salty for most.", "You can buy dried blood at a garden shop. I don't k...
Why when I masturbate can I bring myself to orgasm in a matter of minutes, but during sex it takes longer even though it feels better?	[ "It seems like you may be assuming that faster to orgasm means a better orgasm. Faster is not synonymous with more pleasurable!\n\nSetting aside the very large role our mind plays in our subjective experience of pleasure, there are physiological reasons why you could enjoy sex more than masturbation. When we see ma...
Why do people think Apple is revolutionary?	[ "I don't think most people do???\n\nI'm an Apple fan. I have an iPhone, an iPad, and I'm typing this on a MacBook Pro. But I don't think they're revolutionary.\n\nWhat they are very good at, though, is taking existing technologies, and making them useful and therefore popular.\n\nThey took the technology of using a...
how do fan duel and draft kings make an insane amount of money.	[ "They make an insane amount because a lot of people play on those sites. Anytime you deposit money, they take a little off the top. \n\nAs for your bonus question, it's sort of correct. The people who make a living playing daily fantasy sports usually have their own algorithms that help them choose lineups, then th...
why are plane propellers in the front and submarine propellers in the back?	[ "For planes having the props in front:\n\n1. The weight of the engine in the front helps to balance the airframe versus the aerodynamic center for stability\n\n2. Less chance of connecting with the tarmac on rotation\n\n3. During takeoff the air coming from the props moves over the wings. This is faster than the sp...
Could a tree survive indoors with artificial lighting?	[ "Mature trees don't handle being replanted well, but there's nothing special about being indoors that would present a problem- just a matter of getting enough lights. Growing plants under artificial light is pretty much a solved problem; just ask any of a thousand marijuana growers.", "Yes, but you would need one...
Why do liberals and conservatives both complain they other hates America? Aren't most people proud to be American?	[ "They both think that \"Being American\" means \"Being like me\". The other side wants to be different, so they must be wrong. It's not really complicated.", "I've never heard a conservative say they hate America. And I've never heard a liberal explicitly state that they hate America, they just piss and moan a...
What are psychoactive pharmaceuticals made out of?	[ "It very heavily depends on the compound. Take adderall, which is a mixture of amphetamine salts:\nOne way would be toluene (pine oil, coal or petroleum derivative) is oxidized (usually through liquid phase chlorination) to benzaldehyde, or you can source that from bitter almond oil. Add nitroethane, which is produ...
How are Reddit moderators chosen?	[ "> Don't post just to express an opinion or argue a point of view.\n\nELI5 isn't the place to complain about how terrible people are so this post has been removed.\n\nThe question itself isn't a conceptual question and so it would be removed anyway. Try /r/answers instead.\n\nAnd... from what I can see your post ...
why do trains usually have engines on the front and back rather than just the front or back?	[ "So the engine can push the train no matter what direction it's going. Instead of turning the whole train around, they can just use the other engine", "A great many trains do not. But when they do, there are two main reasons. For commuter trains, it's because they go back and forth all day. For large cargo trains...
Why is my polystyrene coffee cup cool to hold, but other cups tend to be hot?	[ "Polystyrene doesn't conduct heat very well. It's a good insulator; that's why they sell disposable coolers made out of it.\n\nThin paper with some wax covering? Lets that heat through easily though." ]
How is it that I'm occasionally able to hear sounds miles off in the distance (e.g. trains, motorways) as if they were up close?	[ "The time of day is relevant. \n\nSound is a pressure wave, think of it like a ripple in a lake. The source of the sound is the rock being thrown into the lake, and the ripples are the sound waves. They spread outward and get weaker the further out they go. \n\nThe air during the day has a fair bit of movement in i...
why is the swastika taboo but the hammer and sickle isn't?	[ "Swastika is taboo because Germany was conquered by the US and the population was rededucated so that Germans are the ones who prosecute the symbol the most today. Russia was never conquered so theit many people who still openly sympathise with the old Soviet government." ]
The point of death row.	[ "> So what are the primary reasons for incarcerating someone and spending money on them for so long when they're ultimately going to be executed in the end anyway?\n\nBecause the death penalty is so serious, \"all\" various legal processes such as exhausting the appeals process are usually explored by the defendan...
The epic of Gilgamesh	[ "Gilgamesh was a great king but he was very full of himself. So the gods created a companion for him to reign him in and challenge him. They go on great adventures, but eventually his companion dies of an illness. Gilgamesh tries to conquer death by going to find an immortal man, who tells him that if he can stay a...
Why is it that children (and some adults) never hurt their own ear drums when they shriek but everyone elses hurts?	[ "Do a silent scream. Make the motion but no noise and notice how your ears constrict. You're essentially closing them up when you scream.", "If I could piggyback onto this, why is it that people who snore loudly don't wake themselves up?" ]
Why did people think Beanie Babies would be worth a lot?	[ "The first nine or so beanie babies were actually rare and are still worth a relatively large amount (relative to stuffed animals today). They were issued and retired before very many stores sold them. \n\nThe issue was all the later beanie babies were not remotely rare, and were worth nothing once everyone figur...
Why every storm we get the radar shows it moving one way but the wind blows the opposite?	[ "Because the wind is not pushing the storm along. That's not how storms work. Wind moves from areas of high pressure, to areas of low pressure. A storm front is a low pressure area, so wind will flow from the high pressure area in front of the storm, back into it. This also moves the storm, because as the wind move...
Why does it hurt touching the bone if it has no nerves?	[ "There is a sheath (the periosteum) around each bone that has a lot of nerve endings. That's the thing that hurts if you hit or break a bone." ]
How do image identification and classification algorithms work?	[ "This is something I have recently been studying a bit. The way that most of these systems work is by first consuming training data, which is data that humans have labelled and assembled to help the machine learn. The program then uses a ton of complicated mathematical models and statistics to understand the data. ...
Why can't actors fight with actual steel swords?	[ "They can, actually Viggo Mortensen used his \"hero\" steel sword for the entire filming process of the Lord of the Rings.\n\nHowever, it's much more sensible to use an aluminium sword for action scenes, because it's much lighter (2 to 3 times lighter), and actors will have to do the same takes over and over agai...
Putin's government in Russia and the quality of democracy that exists there.	[ "Well, I lived in Russia during Putin's primetime. And in all honesty, 10 years ago he was the best thing that happened in Russia. He made the country great, became a very popular, most people loved him. Then when reaching his maximum term, he declined to rewrite a law (that would let him stick around longer consec...
Why is Google Chrome so unfriendly to Flash and Unity? What downsides do these programs have?	[ "The entire tech industry is hostile towards Flash, that is not a Google specific thing. This is partly due to Flash being a resource hog, and partly due to the fact that serious security vulnerabilities seems to be discovered in it practically on a monthly (sometimes weekly) basis.\n\nFlash became such a prominent...
how skin tags are formed & why are they usually found in armpits?	[ "They are caused by collagen and blood vessels trapped inside a thicker part of skin developing and being rubbed together. \n\n- The armpit is is just one of the most common places, others are: Groin, chest and neck. These are where the skin is most likely to rub against other skin (chafe) and cause this developmen...
Why do dogs circle an area before laying down?	[ "They do it instinctively. Imagine a dog out in the wild. If it's going to lie down, it needs to mat down the wild grasses and brush around it first. Dogs spin to do two things: check for predators and make a nice bed out of the brush around them. Dogs did it in the wild for millions of years and it worked well...
Why do dentists sometimes have to break a tooth into pieces to remove it?	[ "Many times the tooths root is curved and wrapped around or very close to the nerves that run through your gums. Breaking it allows him to manipulate it easier" ]
How did humans manage to relate similar words but in different languages?	[ "Two people, one Romanian one English, interact for the first time. They are trying to learn each other's languages. The English man points at a pineapple and says \"pineapple\". The Romanian man points at the pineapple and says \"ananas\". Thus, they both learn to understand each other via their environment.", "...
Why do applications have bugs on some devices but not others? If a code is written for an application which works perfectly in practice, what introduces problems in the future?	[ "It is really hard to say. There are a lot of things that can lead to bugs appearing, even on the same type of device.\n\nFor example, say we have two Iphones, same specs and everything, one has the bug and the other one does not. It could be that the person with the bug has additional programs installed that are i...
What am I really protecting myself from when I use one of those paper toilet seat covers in a public restroom?	[ "It is basically protecting you from feeling gross. Toilet lids are relatively inhospitable locations for germs.", "It is completely a mental thing. But if a company can convince the world that their product is an absolute necessity, they stand to make a killing. Wasn't so long ago that no public toilets had seat...
What protects the International Space Station from crashing into satellites?	[ "Think of the biggest parking lot you have ever seen in your life. Space is like more than 4 times bigger than that.", "[This picture might help explain a little bit] (_URL_0_)\n\nIn words though, satellites, ISS, and other telescopes like the Hubble for example all orbit in the \"low earth orbit\" which ranges f...
The effectiveness of the "Granny shot"	[ "It is fairly accurate, some players over the years have had very high free throw percentages with it.\n\nIn professional basketball you never see it because the low, slow shooting motion is easily blocked during play. Modern free throw shooters don't use it mostly because it looks silly and they've been raised on...
Why don't we see TV ads that are totally silent and display nothing more than a company's logo for the 30 second spot?	[ "I believe Ford did that during the intermission of the first network showing of Schindler's List. The first showing was somewhat controversial... obviously painful and adult subject material, very somber and you don't want to slam to a commercial of dogs chasing Beggin'Strips. So the first showing was completely c...
Why do some foods(Such as Pizza or Eggplant Parmesan) taste better the day after(once reheated) rather than the day they are made?	[ "I know a bunch of recipes that are better the day after! I think a lot of this is the same reason that marinating something makes sense. You give it time for spices and flavors to really blend, also perhaps lettings things like acids break down some of the food. \n\nI know my lasagna especially is good the day ...
Why do public schools (and many offices) exclusively use Internet Explorer?	[ "Certain settings in Internet Explorer can be controlled through a Windows Domain environment with something called Group Policy. For instance, you can use Group Policy to enforce the Homepage of IE, whereas Chrome and Firefox would require running extra code on every device to keep the home page set to what you wa...
Global stock market issues related to China.	[ "We just had it as a sticky until a few days ago.\n\n_URL_0_?" ]
Can an e-mail travel at the speed of light?	[ "Yes. But that's not how it currently works. \n\nIn theory you could encode a message using bursts of a laser beam and that message would travel from origin to destination at the speed of light.", "In theory yes, but it'll always be slowed down at every hop as the router reads, processes and redirects the data....
Why do foreign shows (mostly reality TV) use English titles?	[ "Aren't those reality shows brand names that are sold to tv channels worldwide?" ]
Why didn't this gopro burn up when it fell from Earth's atmosphere?	[ "It never attained orbital velocity ( like a space ship or a satellite n).. It Got close to space or upper atmosphere by doing a very slow parabolic path on a ballon. This is why Felix Baumgartner wasn't burned in re entry 1) he was still in the thin upper atmosphere 2) he wasn't going 17500 mph that you need to o...
What is a picture plane?	[ "It's an imaginary surface located where the paper (or screen or canvas) of the image is. Imagine your monitor is a window -- you're on one side of it, the thing you're looking at is on the other side, and the monitor's glass is the picture plane." ]
Why is NASA's dicovery of those 7 earth-like planets so important?	[ "Because it's a major step in the search for life in the Universe. This many planets in a single place means they can focus less resources for more gain, aiming everything at a single star. Also, three of the planets are in the habitable zone, making this a seriously exciting find, because if they are there then ...
If a rocket launched into space streams continuous video back to the earth, what will happen once the rocket gets so far away that we don't receive the broadcast signal instantaneously any more?	[ "Well there's not a point it will reach where it won't be live. It will never be footage of what the spacecraft is seeing at that exact instant. The spacecraft could be 10 feet away from you sitting still and if your buddy was watching the footage in the next room over there would be an extremely small delay....
Who buys stock when it's expensive?	[ "Someone who thinks the stock is going to shoot up to $200 a share is going to buy it. Or, more likely these days, an algorithm that thinks it will go up to $60.02 in the next 2 seconds will buy it.", "The people who buy it are the people who think it will continue to rise in price. Other people will not sell the...
What is the significance of gravitational waves being discovered throughout space?	[ "Gravitational waves offer further evidence in support of Einstein's theory of General Relativity. Although it's widely accepted, Einstein's theory is very difficult to test without being able to manipulate masses the size of stars or planets. \n\nGeneral relativity offers a better understanding of the Cosmos and...
How immigration is supposed to work?	[ "Here is the idea... lets say you are a small island nation. Now in your small island nation there is a fixed amount of labor force (people who are working) a fixed amount of wealth (as opposed to money which is a different thing) and a fixed amount of skills.\n\nNow assuming every generation produces exactly as ma...
What would need to happen for the US to adapt a multi-party government?	[ "Theoretically the S could have a multi-party government. There's no law that says you have to be a Republican or Democrat to get elected. \n\nHowever, realistically there will only be two major parties unless the US adopts election rules that don't require over 50% of the vote to win or we don't directly elect the...
How do you make fire works have shapes, such as hearts and shapes.	[ "Even though the cartridges you see probably all look ball shaped, what's inside isn't.\n If you take a fire cracker, and put it in a metal bowl, the explosion will be contained on the sides, and be pushed out the top of the bowl.\nThis shape charge effect is what all sorts of explosives use, and the same is with f...
What is the impact of young children using computers to stimulate imagination vs. physical toys?	[ "Eyesight. Playing with a screen forces eyes to stay at a fixed focal distance. Even if virtual workspace is drawn as perspectived 3d. The backlit screen also adversely stimulates the eyesight.\n\nAlso nowadays computer games and especially apps are written towards short term instant satisfaction. Grinding th...
How does a bank process a check that is scanned in for deposit using a smartphone?	[ "optical character recognition identifies the account and routing number as well as the handwritten amount. This is what usually causes it to fail when it does. the dollar amount being unclear can be an issue sometimes. But for the most part its pretty simple and effective." ]
What would happen to the economy/society/politics if a cap was placed on personal income?	[ "Well obviously there would be less of a gap in income, because we'd chop off the top of it.\n\nThat being said, why would you invest your money if you couldn't earn more than what you were already earning? You'd probably just hoard it. that would likely completely cripple the economy, and everyone would likely j...
What exactly happens when you put a fork in the microwave? (Why)	[ "Microwaves oven use radio/microwaves in about the same band as as your WiFi router. The only difference is the WiFi is about 0.1 Watts, and the oven is 1000 W. \r\r\rJust like your antenna in your laptop picks up the WiFi signal as an electrical current, so do metal objects in the microwave. But since it's 10,000 ...
Why Democrats and Republicans are so called, when both parties are in favor of democracy and republic?	[ "Because everyone is in favor of democracy and republic. So that name isn't objectionable to anyone, so you have the broadest possible appeal.\n\nThe names are historic. The republicans formed in opposition to the democrats largely over the issue of slavery.\n\nThe democrats formed earlier from the collapse o...
Why don't rockets have fins, and why DO model rockets?	[ "Because the rockets without fins can actually be steered by the rocket motor nozzle itself. Model rockets and even the old V2 German rockets were just fixed nozzles and needed fins to produce drag when the rocket attempted to \"tip\" thus keeping the bottom below the top.\n\nAlso, model rockets do not leave the a...
What is a domain and who actually owns the domain? How does a domain come into existence?	[ "domain names are owned by an individual and registered through a registrar. a domain name is created by being registering an alpha-numeric combination of letters with a domain name registrar; if nobody has already registered the domain name, the registrar can reserve the usage of this domain on behalf of the custo...
Why does the throat become so dry when laying in bed/sleeping?	[ "Generally because you are sleeping with your mouth open which dries out the mucous membrane. If you don't believe me, try keeping your mouth wide open and breath in and out for an hour and tell me how your throat feels." ]
Since your voice sounds so different to your own ears, then how can you do impressions of other people?	[ "I'm no expert, but when I started singing I was told that I needed to \"stop listening to my own voice and start listening to my brain\". When we do impressions of people, we listen to their voices in our heads and speak as we hear it in our head. If we were listening to our own voices and trying to get the impres...
The concept of the ghost in the machine	[ "EDIT: Wow, okay, so I'll leave up what I wrote but I just realized that I've been misinterpreting this \"ghost in the machine\" business for a while, and what I wrote is a common usage of the phrase, but untrue to its original meanings. The \"ghost\" is the mind, but the \"machine\" is the human body. [Descartes...
Why does google image search for, "Best family photos 2017" pull up images of nothing but cars, whereas the main result page shows something completely different? Does this have to do with how the algorithm works, or is it glitchy?	[ "Well I did notice that those are images from \"Best Family Cars\" or \"Best Cars For Families\"" ]
the first pregnancy tests on record were in Ancient Egypt. Women would pee on a field of wheat and barley. If the wheat sprouted, it was going to be a girl. If the barley sprouted, it was going to be a boy. If neither sprouted, the woman wasn't pregnant. Why does this work/Why did it work	[ "Yeah, so the boy / girl test definitely didn't work. And I'm hard-pressed to think of a reason why this should have worked at all. I'm going to go for superstition." ]
re: "too big to fail", won't broken up banks still be as much of a potential threat to the economy?	[ "The difference is it is a lot less likely that 10 banks will all fail at the same time or all have identical portfolios of assets.\n\nBy breaking one big bank into a bunch of smaller banks you avoid the scenario where one guy makes a few bad decisions that tank an entire national economy.", "It's the decentraliz...
What is it that our bodies do when we sleep? Why do we need it, what is "replenished" etc?	[ "We don't really have a definite answer, some say it's important in the conversion of short term to long term memory, that when you sleep your mind basically gets a chance to\"De-fragment\" all of the information you took in that day.\n\nOthers say it's necessary in order to give our bodies time to heal and recover...
Raising and lowering of the federal interest rate. Why is this so important?	[ "When you take out a loan from a bank, that bank in turn often will take a loan out from another bank. The interest rate on the bank borrowing from another bank is defined by the federal interest rate. Thus if the federal interest rate goes up, so does the interest on your loan.\n\nLow interest makes it easier to b...
What happened between David Mustaine and Metallica?	[ "According to Mustaine's biography, which is surprisingly readable , he was a drunken, argumentative, belligerent young man, and he was quite a jerk to the bass player and other members of the band.\n\nThey eventually kicked him out after numerous incidents involving drunken behaviour and aggressiveness.\n\nIt drov...
The fly in Breaking Bad	[ "The fly itself was not a problem, that is the main thing you should get out of it. This episode in particular is meant to reveal more about Walt's character. Though Walt gives some BS explanation as to why the fly can't stay in the lab (which can be taken seriously and probably makes sense), it is just Walt giving...
How does my body filter out the stomach acid that mixes with the water I drink, so I don't pee acid?	[ "You don't filter it out instead it is neutralized by sodium bicarbonate secreted in the Duodenum (the first part of the small intestine directly connected to the stomach.\n\nstomach acid + sodium bicarbonate =salt + water + carbon dioxide (that you breath out after transported to the lungs)", "Anatomy student h...
What's the best way to protect my computer and my identity from hackers and "dox"ers?	[ "\"doxing\" is usually done by looking up information on the Internet. For example, if I wanted to dox you, I would look through your Reddit posting history and note down any useful information that you unwittingly provide. I would then search Google for your Reddit username, hoping to uncover accounts on other web...
If hate groups and hate speech is protected by the first amendment, how can we combat racism, sexism, etc. without depriving people of their constitutional right?	[ "This is an insanely complex question, one that probably can't be explained to a 50 year old, let alone a 5 year old, but I'll give it a shot. \nThe most important thing you can do is have empathy. You have to understand where the other guy is coming from. No one is ever\"Bad Guy\" of there own story. They have a r...
How does my phone know what to advertise to me? I was just talking to a friend about fleece joggers and an add appeared on my phone for fleece joggers without me even searching for it anywhere on the internet.	[ "If you genuinely haven't ever searched for \"fleece joggers\" (not in google, not in eBay, amazon, even on another computer as your google account will pool all of this data) it could still be more than coincidence. It could be \"big data\" at work.\n\nBig data uses the idea that by collecting enough small pieces ...
In music, why do consecutive notes become less dissonant as you raise the octave of one?	[ "The reason notes sound nice together is that their waves are harmonic - that is, their frequencies (or wavelengths, whichever you prefer) \"line up\" with each other at regular intervals.\n\nFor example, A3 (220hz) and A4(440hz) on a piano sound nice together because A4 goes through two cycles for every one cycl...
'Desalination' and the difficulties associated with performing it on a large scale?	[ "[This diagram shows the desalination process done at one of the plants in Singapore](_URL_0_)\n\n[Website Source](_URL_1_)\n\nHope that helps!" ]
Why do some online stores have different regions?	[ "It's due to copyright related issues, one different companies can hold the rights to the same book in different regions, for example that upcoming Star Trek series was licensed to Netflix in every other country than the United States.\n\nSometimes it is also due to legal issues, e.g. games with Nazi symbols may no...
Floating	[ "It's all about density. \n\nAs an object enters water, it displaces some of the water proportional to its volume. For example, a cube one meter per side will displace exactly 1 cubic meter of water when fully submerged.\n\nHowever, as you submerge an object, the water pushes back up on it, and it turns out tha...
In the Movie, “50 First Dates,” how does Lucy singing The Beach Boys song mean that she remembers Henry?	[ "Earlier in the movie her father had realized that she only sang that song on days she'd met Henry. So her singing it even while she was isolated from Henry showed that, on some level, she did remember meeting and knowing him. When he goes to visit her he confirms it, because she's been painting pictures of him a...
Why is it when you say “ahh” hot air comes out vs when you say “whew” cold air comes out?	[ "It’s not actually colder, it’s just coming out faster because it is squeezing through a smaller opening, and fast air feels cold." ]
Dreams	[ "Since the first question is still up for debate, but the second question is more answerable - I will start there.\nSleep itself is broken into 5 stages and they dont have real names so I'll just paraphrase them a bit - 1) Light Sleep 2) Moderate Sleep 3) Deep Sleep 4) Deep Sleep Part 2 5) REM Sleep.\n\nNow the on...
Is there a scientific/evolutionary reason why I want to be alone when I need to poop?	[ "This is just a social thing because if you go to some places (poorer nations) in some extremes they will just crap on the side off the road and continue there daily routine.\n\nAlso there are people who enjoy watching this sort off thing...\n\nSo no it's not a science explanation just more of a social aspect of ho...
Why was heroin so widely used / such a scourge to rock bands of the early 90s?	[ "I'm not sure what your talking about. Hendrix, Garcia, Ginger Baker, Crosby, Keith Richards, Bob Dylan, Steven Tyler, Eric Clapton, etc. all were at least involved with heroin if not massive addicts. If I had to guess, maybe the dark and gritty grunge era music reflected the heroin addict life style a la Trainspo...
Why do we need to send a satellite (New Horizon) to photograph color pluton when we have telescopes that see galaxies much farther?	[ "The ability to see so far in space is based solely on light. Pluto does not give off light itself and is too distant to reflect visible light from the Sun. When we are looking at distant galaxies through a telescope we are looking at the stars in the galaxy. We have not yet been able to visually see an exoplane...
Why do Germanic-based english words change a lot in root and plural, while latin based words are correct down to the T* including their plural?	[ "Cactus and octopus are actually interesting cases, because they are Greek via Latin into English. Technically, for octopus, you can use any of \"Octopi,\" \"Octopuses,\" and \"Octopodes\" and be \"correct.\" Granted, if you use the third one, nobody's going to know what the fuck you're saying, but either of the fi...
Difference between Titanium Dioxide; nano, anatase, rutile and photochromic	[ "Can't help you with the difference between them functionally except they are derived from difference sources (like the difference between beet sugar and cane sugar). However if they sell rutile as cosmetic supply then they are [usually in powder](_URL_0_)." ]
Does your body process alcohol differently when extremely dehydrated?	[ "Alcohol is a diuretic. What this means is that it's a substance that increases the production of urine, which in turn increases the excretion of water from the body. Alcohol does this specifically by inhibiting anti-diuretic hormones, causing diuresis (increased water excretion by the kidneys). Caffeine is another...
Why do we enjoy the feeling of being scared?	[ "It gives you an adrenaline rush. Adrenaline can be VERY addictive. That's why adrenaline junkies are sometimes willing to put their life in danger just to get that rush." ]
How much do Finance, Economics, and Accountacy majors know about each other's fields?	[ "One can argue that accounting records economic transactions to build financial statements that are then used in finance to establish the worth of a business (or transaction) which drives further economic transactions (and in aggregate, the economy). \n \n\nAs a result of the relationships between the fields, m...
Why is the night sky different colors in different parts of the world?	[ "Light pollution will be part of the issue, but it usually causes a glow. The difference of color seen in the sky is usually due to the dust in the atmosphere. In farming areas (especially around planting and harvest times) the sunset will appear different than the sunrise. This is due to the fact that working the ...
Why are male beauty pageants significantly less famous than women's such as Miss Universe?	[ "Across the human species, men are more visual in their attraction to mates than women are. Staring at a bunch of female hotties is something that appeals more strongly to a bunch of males than the other way around.", "The cultural norm has been that women attract mates with their appearance, and men attract mate...
Why do burps sometimes get stuck in our throats?	[ "Haha it's nothing too serious. If you've got chest pains, or finding it hard to breathe sometimes... It might be due to achalasia cardia. \n\nJust go to your local pharmacy and tell them your symptoms. I can't remember the name of the pill, but when I do remember, I'll tell you.", "Your Esophagus has 4 constrict...

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