Split (3)

train · 273k rows

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how foodstuffs can sit on shelf a long time and then must be refrigerated after opening... is it just exposure to air that flips the switch?	[ "Right on, and exposure to bacteria. Moisture without oxygen in a sterile environment won't generate bacteria. Once opened you have all three, by refrigerating you actually just slow the enzymatic breakdown and reduce the suitability for bacteria to grow on the food", "Yes. Once the seal is broken, the contents a...
Why can't we tax everyone the same percent?	[ "There is literally no government policy anywhere that nobody would complain about.\n\nIn this particular case, it makes little sense to tax people who are already on government assistance (even aside from whether it's right to do so).", "It's horribly bad for the poor, who currently pay nothing or next to it, ...
How a Jeep is able to climb an almost vertical incline with not much trouble?	[ "a combination of low gearing, low center of gravity, and engine location.\n\nthe engine being in the front means that the weight helps hold the front end of the jeep down, making it far less likely to flip while climbing. the low center of gravity also helps prevent flipping in the same way.\n\nthe low gearing all...
Why is it that transplanted organs only have a short life span once transplanted?	[ "Primary reason is the person's immune system attacking everything that is foreign in the body, including the cells of organs that don't have the exact genetic markers that the immune system recognizes. \n\nSo in a transplant situation, they have to match the blood type between the donor and the recipient, and it ...
What happens to someone who does not eat vegetables at all	[ "Are they being replaced with anything? You could go into a severe vitamin deficiency, which would have different effects based on what vitamins are deficient. Also you could go into a calorie deficit and lose weight. Lack of fiber is another possible issue which will lead to constipation." ]
does drinking chocolate milk give the same benefits as drinking regular milk?	[ "The normal positive aspects of milk (Vitamin D, calcium, protein) will all be in chocolate milk.\nThe downside is that chocolate milk usually has quite a bit of sugar added to it.\n\nEdit: and as for milk with chocolate cereal, it depends entirely on the cereal. You'd just get bits of the cereal leaking into the m...
How is the maximum load of truss columns calculated?	[ "The amount of load a column (whether part of a truss or not) can safely hold is principally based on the material,the geometry, and the nature of the load.\n\nThe material (wood, steel, concrete, aluminum, masonry, plastic, etc) has a certain strength properties. Each material has a certain allowable stress (force...
At what heights do falls become dangerous?	[ "There are a lot of variables in that question. People have fallen and died from a standing position.", "It depends what part of your body hits first. However, falls from more than 10 feet in adults and falls from 2-3x the height of a child are considered severe.", "People have died from falls from standing pos...
Why are vaccines egg based? How are they made?	[ "They grow the virus with host animal cells, and eggs are high in supply." ]
What this Tesla Model S thing is about?	[ "1. A New York Times reviewer wrote up a description of a trip he took in a Tesla car. He described instances where the car didn't get as much mileage as Tesla claimed, and that at one point the car ran out of power and he had to have the car towed.\n\n2. The head of Tesla called him a god damn liar (I'm paraphrasi...
How durable are pandas?	[ "Like all bears, pandas have ridiculously large and thick bones which make them very durable in general. In addition, bears also have thick layers of fat which can absorb impact, as well as dense outer hairs which provide protection. These attributes combined with their huge muscle mass make pandas and other bears ...
How does crop rotation work?	[ "Crops have different effects on the underlying soil. Vegetables tend to be taxing on the soil because they're grown really densely, they need a lot of nutrients, and they don't leave behind deep root systems to help replenish the soil by decaying.\n\nLegumes (like alfalfa or clover) harbor nitrogen fixing bacteri...
why did the SpaceX exhaust trail (or what ever that was) stay illuminated for so long?	[ "It was because of the time of day. While it was night down on the ground, the sun was still shining 100km up in the sky.\n\nIt was so bright and so big because the exhaust contained a lot of water vapor. When you burn any fuel containing hydrogen, it combines with oxygen to create water. In space, that water-conta...
Why aren't there automatic transmission motorcycles?	[ "There are, they just aren't popular. Also, scooters are a thing. Automatics cars are more popular than manual (in the US), because we are lazy and don't like to swift and like to always have a free hand. For motorcycles, it's different, you almost always want two hands on and shifting is much more simple, not many...
How can someone see practically all you've done on a computer, even after you've deleted it, but recovering a phone doesn't always find everything?	[ "If you delete something, it's only moved to the trashbin at first, where it's still 100% intact. If you delete it from there, you only tell your OS to clear the place. It basically makes the area on the drive available for being written over, but it's still there, as not every single switch is reset. Only once eve...
Why is it far easier to run up multiple stairs than down multiple stairs?	[ "Actually I think this has to do with the mechanism behind climbing and falling. \n\nWhen climbing, you are working against gravity and have much more fine control over how much energy and power is needed to be supplied to your muscles to overcome gravity and attain the speed you desire to go up the stairs. \n\nWhe...
Is there a word, in any language -- that describes the deep, sinking feeling of knowing that life is short, and we're going to miss out on so much...	[ "Existential dread. Plenty of philosophers in lots of languages have discussed that feeling.", "Torschlusspanik - Literally, gate closing panic, but meaning the feeling that aging is limiting our options.", "There's a phrase in Japanese that might capture the feeling you're taking about: mono no aware. Here's h...
what's the difference between .com and .org and .gov and .net and etc etc	[ "Different rules apply to each TLD (top-level domain). ICANN is the organisation that runs the show, they decide what TLDs should exist and what rules or sub-organisations should govern them.\n\n.gov is a good example since as you guessed, it's restricted to use by the US Government. ICANN will not allow anyone els...
Why does your body occasionally jolt you awake when you start to doze off?	[ "It's called a [hypnic jerk](_URL_0_) and can result from anxiety, stress, or nothing at all." ]
Plasma, in the electrical sense. Why is it its own state/phase?	[ "Plasma forms when you heat up a gas to really high temperatures. The electrons get ripped away from the atoms due to their high energy. This is called ionization. This makes plasma highly electrically conductive. Plasma is its own state of matter because its properties are so fundamentally different from a gas, in...
What causes our muscles to feel weak when we are nervous/ in a high tense situation?	[ "When you are stressed, you're body reroutes blood away from your limbs to supply your brain and other areas. The lack of blood can give you that weak feeling.", "Basically your body is continuously pumping out the stress hormone. The stress hormone is a stimulant, and being exposed to it for long enough can caus...
Why is it that when ants or other bugs fall from the ceiling to the floor they don't die/can still walk, but me falling from a short height could break my legs?	[ "Square cube law. They don't have nearly the volume per unit of surface area you do. \n\nSo assuming approximately equal mass per volume, the ultimate force generated by the same fall and stopping with the same negative acceleration will be much higher for you because of the increased mass. F=ma\n\nAlso chitin is q...
Why people lost all their money in bank failures back in history? Did they have no insurance or other securities?	[ "Insuring bank deposits is actually a fairly recent thing - back when the Great Depression started, your money in the bank was only backed up by your trust that the bank wouldn't fail. Which is why there were runs on the banks when that trust ran out - if the bank went under, your money was gone.\n\nIn the US, the...
How do we get pictures of North Korea if North Koreans are forbidden from the internet?	[ "Under the right circumstances people can get in and out of North Korea. Under even more right circumstances they'll be allowed to have cameras.\n\nNorth Korea also has a government regulated media, including television. Broadcasts can be picked up from South Korea." ]
Why are children more likely to fall off the bed while in deep sleep than adults?	[ "When you sleep your brain turns off your motor-cortex (the thing that controls your limbs) so that you are basically paralyzed. This is also the reason you sometimes feel like you are falling when you are about to fall asleep and suddenly jolt yourself awake.\n\nIn children this function is still developing and so...
Why is everyone against a one world government?	[ "Because the needs and wants of society vary greatly depending on the region you live in, climate, available resources, opportunities, culture... there's very few laws and policies that you can blanket across the world and make work.", "Because they fear other cultures controlling their own, or other people/cultu...
Why do Indians bob their heads forward and backward when they talk? [FIXED]	[ "The culture is different in india. A left to right wobble means \"I agree\". If they sort of bobble their head in a circular motion it means they are listening. If slow its friendly if fast its more like \"I really understand\".", "The head bob is just a gesture. It sort of means \"ok\" or \"if you say so\". Y...
If Mary was a virgin (and had thus never 'known' Joseph), why does Matthew 1:1-17 explain the lineage from Abraham to Joseph as the Genealogy of Jesus?	[ "The lineage was to establish Jesus' royalty by identifying him as a son of David and heir to the Kingdom. It was not meant to establish strictly biological descendency. Notice that it does not say that \"Jacob begat Jesus.\" It specifically says that Joseph was the husband of Mary, who gave birth to Jesus.\n\n*Rig...
Why do some companies or sites pay for annoying pop up ads when they only make us angry and less likely to buy their products?	[ "I can only assume these ad bring in a sizeable return.\n\nBusinesses don't play around especially if it would only serve to ruin their reputations - but if something makes them money then they clearly wouldn't be competitive if they didn't take advantage of it.", "Even though they anger us I think those ads are...
Why do we feel the urge to keep throwing up even if there is nothing left?	[ "It's because of the physiological mechanisms involved in throwing up.\n\nWhen you first start, it's in response to the body trying to expel something. The muscles around your stomach contract and squeeze it to propel the contents out (there are other elements involved, but they're not relevant to the question).\n\...
How do buffets make money?	[ "For everyone that eats 5 plates there are people who went to a buffet had a plate and then realized they were not as hungry as they thought.", "The same way any other restaurant does: by making sure that prices are high enough to cover all the costs of food, staff, rent, etc, and with enough markup to make a pro...
Why fizzy drinks like Cola are stored in aluminium cylinders, while milk in cardboard cuboids?	[ "Probably because cardboard doesn't keep the carbonation from escaping soda as well as aluminium.", "Fizzy drinks are pressurised, cardboard can't contain the pressure well.", "When I worked for a semi high end pet food distributor, I remember we had milk in aluminum cans. I think it was either specifically for...
How can a plant which has always been an indoor plant and never been outdoors suddenly have ahids or gnats? Where did the bugs come from?	[ "Aphids are small enough to get through window screens and can be windblown onto screen from nearby plants, and most houseplants are kept near windows. They can also hitch a ride on you when you brush by aphid-infested plants then go inside.\n\nMost gnats seen in houseplants actually come from the soil, their larv...
- why, in the wild, does rigor mortis set in an animal carcass in just a few hours, but the meat from my butcher stays 'fresh' and limp for days?	[ "Rigor mortis is not permanent. \n\nDepending on several things it does goes away & the body relaxes after a few days (typically 72 hours or so).", "Rigor mortis isn't permanent. The muscles will eventually relax out of rigor. So the answer to your question is that they already went through rigor.", "Rigor mo...
Do any other forces besides supply/demand factor in a company's stock price?	[ "Profit (technically) doesn't matter when it comes to stock. When you see a \"price\" for a stock, that's not the price sticker of the stock like an item on a shelf in the store, that's just the average price people are willing to pay for a share of it.\n\nYou can sell your stock for less, you can sell it for more,...
Why does hot water (or heat generally) clean better than cold water (or cold generally)?	[ "It's all about the chemistry. Heat is a measure of kinetic energy, so hotter chemicals are moving faster. In most chemical reactions adding heat will speed things up as the faster moving molecules will collide more often and therefore are more likely to react. Because of this, hotter chemicals have a higher reacti...
Why did the FBI publicly release the information about Patraeus's affair? Isn't that part of his private life?	[ "If he has something he wants to keep secret, that's an opportunity for blackmail. And blackmail is a big concern when you have access to top secret information. By making this information public, they remove a potential security risk, because you can't blackmail someone over something everyone already knows. Damag...
How is the quantum world random yet the world we know predictable?	[ "The quantum world is random in specific, but predictable on average. An example of this is the tossing of coins; no single toss can be easily predicted, but if you toss a coin many, many times, you can bet that it will land on heads very close to 50% of the time.\n\nWhen you put a few things that are predictable o...
How does gravity affect time?	[ "More gravity makes time go slower. The reason stems from two observations. \n\nThe speed of light is always constant, no matter who measures or where it is measured.. One important result of this is that time and space will change with speed. Since speed is distance divided by time, the only way to keep the ...
How are time statistics calculated? I.e: every 20 a kid dies and stuff like that. How accurate this kind of numbers are? What is the time interval used for sampling?	[ "It's not literal \n\nIt's just an average based on totals over a total amount of given time \n\n\nLike if you knew in 1 year 12 people died from auto erotic asphyxiation the you would say that 1 person dies from it every month. Wheras the reality might be that they all died the same day at an auto erotic asphyxia...
Why are some people naturally talented with maths? How does it happen?	[ "I think this gets in to a nature vs nurture situation. It's likely he wasn't born with an ability, but had a recurring need for this ability through early childhood or something and it became thoroughly developed through time.\n\nOr just lots and lots of practice", "What is 13 times 9? The quickest way to do it ...
What would the United States look like today if no humans have ever explored the land?	[ "A hell of a lot of Buffaloes and Wooly Mammoth's would be roaming around. The Eastern US would have more forest than it does now." ]
Why do cuts burn when you put hydrogen peroxide or rubbing alcohol on them?	[ "The chemicals in rubbing alcohol when applied to an open wound activate the same nerve receptors in your skin that let you know that a flame is hot, giving you a burning or stinging sensation. 🔥" ]
What objective reasons explain why some people can hold their liquor while others can't?	[ "Practice makes perfect.\n\nThis does not just apply to tolerance, which indeed would be much higher in someone who drinks daily as opposed to yearly. For instance we all have a buddy who gets the hottest wings everywhere you go and they barely phase him but if you were to touch them to your tongue it would ruin y...
After being bothered by mosquitoes, I began to wonder: Do mosquitoes have any purpose? Why do they bite certain people more than others? If mosquitoes were annihilated, would anything affect human society big time?	[ "> Do mosquitoes have any purpose?\n\nThey have just as much purpose as any other living animal or organism on Earth. They live to reproduce.\n\n > Why do they bite certain people more than others?\n\nGoogle can answer that: \"In addition to heat and carbon dioxide, mosquitoes are also attracted to naturally-occu...
I'm teaching myself to sing, and I'd like to know why my throat hurts after a short while of doing it. Also, how do I stop it doing this?	[ "I'm pursuing a BA in classical vocal performance currently. Almost all vocal fatigue is due to muscle tension when you sing. Do you feel like you are straining to hit most of the notes? If so, the song may be in too high of a tessitura (avg range of the song) for your voice type. By your username I'm assuming ...
Metaphysics	[ "Metaphysics it trying to understand the Universe by talking about it.\n\n\"Imagine you are doing a thought experiment\"\n\nIf you are using ideas, forces, entities that can not be tested with an experiment with tangible evidence, you are doing metaphysics.", "Looking at the word 'metaphysics' from an etymologica...
Why Comcast "Xfinity" ads are allowed to continue claiming they are the fastest ISP in the country when they are clearly lying?	[ "They offer 305mbit/s fiber residential service in certain metro areas - they are the fastest residential isp In those and likely other areas as well\n\n_URL_0_\n\nedit: also they may be saying something like \"fastest national ISP\" because one-offs like Google Fiber are not a nation-wide ISP. And when they offer...
Why is the post-WW2 50s decade considered the quintessential time period for defined gender roles when throughout the 40s women were in "men's" roles for the first time?	[ "Because after the war there was a push for women to go back to traditional roles, this didn't fly. So women have been fighting to gain equal footing as men in career roles ever since.", "During ww2 there was a requirement for women to take over mens' jobs as the men were away fighting, but once they all returned...
why window tinting is black instead of white	[ "sane reason sunglasses are tinted dark or a color instead of white. It aborbing the light prevents it from coming in. \n\n\nAlso if it was white it would reflect on the inside too. Possibly making glare which is opposite of the point. (car light lamp or otherwise)", "Depends what is trying to be achieved - f...
Why my computer was so brilliantly fast when I first purchased it is now intolerably slow after only a few months of use.	[ "When you buy a computer, there's nothing bogging it down (or at least, not a lot). But when you put more files onto it and start running more programs, it becomes \"cluttered,\" in a sense.\n\nThere are a few different types of memory on your computer, but primarily I'll talk about your RAM and your hard drive. ...
How older films can be made into 3D (eg Titanic, beauty and the beast). Can they do it with TOPGUN?	[ "It can be straightforward, but it depends on the type of effect that needs to be achieved.\n\nIt's basically a process of manually 'cutting out' (rotoscoping) elements of an image, turning it into layers. These layers can then be shifted around, differently for each eye. This would normally leave a gap around the ...
Why do they worry about rocket ships burning up when returning through the atmosphere from space, but not going to space?	[ "A rocket shop starts at earth at standstill and speeds up to get into space. The rocket ship is not going really that fast in the sense parts of the atmosphere. \n\nWhen a rocket shop returns it has orbital velocity, aka is going really fast. To slow down it actually uses the atmosphere. With terribly big shoes ou...
Types of UK visas and what they require.	[ "Go to _URL_0_ all the information is there.\n\nSince you're on a tier 4 I'm assuming you're a student or have a post study work visa. In which case you will either need a sponsored tier 2 if you're looking to work or a standard tourist visa if you wanna just hang out. (I think)", "You'd be better off asking this...
Why does the US have so much more aircraft than any other country?	[ "One of the main tactics used by the American military relies on overwhelming air superiority. Ground forces discover enemy fortifications and locations, and call for bombing runs. \n\nAnd, of course, there's also the matter that the US military is often fighting around the world, and the fastest way to get across ...
Why does folding a piece of paper both ways help to tear a straight line?	[ "Folding paper weakens the bonds at the fold. The outer bonds are stretched more, so folding both ways weakens both sides at the crease. When you tear, the rip follows the path with the weakest structure which is usually the crease." ]
why wireless devices/electronics can't be used in an airplane below 10k feet..	[ "Previously the FAA was worried that the small EM field generated by electronic devices could introduce interference to an airplane's internal electronics. This was well before shielded everything on these planes. Recently the FAA has come out in favor of consumers, saying they are going to recommend the allowance ...
Is Africa as unstable as the media portrays it to be?	[ "Africa's a pretty big place, and the experience can certainly vary depending on where you go. Blood Diamond was set during a civil war in Sierra Leone, so the shitshow factor is going to be pretty high in such a situation by default.\n\nIf you went to some place like Nairobi, Cape Town, or Johannesburg, it'd be mo...
How do American street names work?	[ "Pretty simple, actually they are probably the same as the UK. The examples you mentioned \"[street x] and [street y]\" are cross streets. They are saying \"at the intersection of Raven and 42nd\".\n\nAll our streets have 2 parts, the name, like Raven or 42nd or Main or what-have-you, and the postfix, which is usua...
What happens when we crack our knuckles?	[ "The fluid in your bursa sacs are moving, and quite quickly at that. Sudden movement makes the popping sound.\nLike you're five: Look at your fingers. They are made up of little chunks, with knuckles in between. Think of these knuckles like hinges on a door. They allow the door to move back and forth. Knuckles do t...
Why are rainbows shaped like arches/parabolas	[ "You're only seeing a portion of the full circle.", "Lets start with the sun. The sun is so far away and so large that every ray of light that hits the earth is essentially parallel. It's not like a street lamp, where if you walked by the lamp you would have to turn your head to follow it.\n\nSo, rays of light fl...
How is it legal for the US to conduct drone strikes in foreign countries that result in the deaths of innocent people without any repercussions?	[ "Who would stop them?\n\nTypically the drone strikes are done with the consent of the country in question (Specifically Pakistan). Public hand wringing doesn't necessarily equate to private Disapproval.", "If this is a question about the legal debate, then the most important factor is the supposed terrorist's non...
what would be the benefits and the drawbacks of having one world currency?	[ "If you have one world currency you link the economy's of every country in the world.\n\nIf you look at some countries they are currently in recession leading hyperinflation of there currency etc. Not to mention what happens when a country is at war like Syria and economies collapse. \n\nWhat would happen is larger...
How come I do not feel hungry in the morning if I don't eat breakfast, but if I do, I find myself wanting something to eat or drink.	[ "It's actually kind of simple really.\n\nIf you don't eat breakfast, you're body looks to other ways to begin fueling itself. If there's nothing in your stomach, it seeks out and uses glycogen (stored energy from food you've recently eaten) to run itself, and also to help your brain function properly. (Your brain g...
What is the economic growth and how is our economy model based on it ?	[ "Economic growth simply means that the economy is producing more value as time goes on.\n\nTake for example a small village. It has an economy in that the villagers produces things of value. Say there's a clothing factory or a mine. These hard working villagers are producing useful things of value on a daily basis....
why don't hockey teams hire a 500 lb. goalie to block the whole goal?	[ "There is a sports science episode covering this.\n\nIt basically boils down to 1)It does not cover the whole net. And with the assumption that a 500lb guy isn't too athletic, the open part of the net will just be free goals.\n\nAlso regulation sized protective equipement does not cover a 500lb man.", "Sit on the...
How do new, unpublished writers ensure that their original work is not copied/stolen by the publishing house they give their work to consider?	[ "Copyright protection, unlike patent protection, exists automatically to protect a work. No registration or other action on the part of the author is required. \n\nSo if a publisher were to steal an author's work, the author would sue the publisher and -- assuming they could prove that they indeed authored the work...
What does a part-time teenager do with his W-2 form?	[ "More than likely your parents will claim you and they should handle this. However you can file a return yourself (see below). Make sure to check with you parent if they are claiming you as a dependent.\n\nYou can file a tax return and get any federal (and probably state) taxes you paid back in a refund check.\n\...
How do we (in first world countries) contribute to the "Great Pacific Garbage Patch" and other marine trash issues?	[ "* A lot of the trash is blown off beaches or picked up by tides off of beaches world wide. \n\n* Other trash was thrown in by careless boaters. \n\n* Trash is washed into rivers and sewage system pipes that flow into the ocean in heavy rains. \n\n* Faulty sewage treatment plants, or sewage treatment plants that ar...
why the news doesn't report on suicide (unless it's a celebrity)?	[ "Because comparatively few people care. It is not a story that has an effect on a significant number of people." ]
Why do game developers make exclusives when it limits their audience so much?	[ "Usually because that console manufacturer publishes the game for them. \n\nFor example ThatGameComapny made really odd and out there games that a big publisher wouldn't likely publish, for fear it wouldn't sell well enough to be worth their time. So Sony approaches them and says \"We will publish your game, market...
how counting cards in poker works?	[ "As a general rule, you don't count cards in Poker - you count cards in BlackJack. This is because, unlike most card games, BlackJack does not shuffle the deck between hands. This means that knowledge of historic cards can give you important information about what cards remain in the deck for future hands.\n\nThe...
Why does my pen work on a sheet of paper, but doesn't on another one?	[ "A ball-point pen requires a certain amount of friction between the ball and the paper in order for the ball to rotate, which moves the ink down from the reservoir to the paper. Also, the paper surface needs to be porous enough to pull the ink off the ball onto the paper. Other types of pens have similar requiremen...
Why Do Animals Leave Permanent Water Sources?	[ "Staying in a place is making predator job easier and making it harder and harder to find near food.", "If large herbivores grazed one area continuously, the vegetation wouldn't have chance to regrow, so they move to new areas." ]
Why has iTunes been deleting all my music since 2004?	[ "Sounds like what is happening here is that you are syncing a device with a device with an unassociated library. An iDevice gets linked to a particular authorised computer + library file, and when you sync your device with an unrelated computer, it will erase the content. I know you said you manually manage the dev...
What is CFOP?	[ "It's a very common method for solving a Rubik's cube. \n\nC: You form a Cross of all the same color on one of the faces.\n\nF: You solve the First two layers below the face you formed the cross on. Also known as F2L.\n\nO: You Orient the bottom face. Basically you completely solve the face ...
Where does the extra water go during low tide?	[ "It shifts to a different part of the earth causing a high tide in that region." ]
What is happening, physically, when you feel like you've burned off your taste buds with hot tea, soup, etc?	[ "You've destroyed the nerve enedings. That's why sudden pain then numbness. The mouth regenerates very quickly however, thus feeling will come back in a relatively short amount of time.", "You've actually killed off some of the sensory cells, but it's ok because they grow back fairly quickly." ]
The Orch-OR (Orchestrated Objective Reduction) Theory	[ "I can't explain it, much less in terms a 5 year old could understand. Any explanation, at a minimum, is going to have to include introductory explanations of Platonic forms, Godel incompleteness, neurobiology and cell structure. All I can tell you, very simply, is that no one who is helping to create and refine ...
How is the design of the U.S. gov't "deliberately inefficient"?	[ "The checks and balances system ensures that one person or one branch of government can't make quick, unilateral changes. For a law to be passed and take effect, all three branches have to be (more or less) in agreement. The fact that legislation can be difficult to pass, even if one party has a majority, makes som...
why is turning your assets into cash called "liquidating"?	[ "This is known as a \"metaphor\". \n\nMoney isn't literally liquid, but we do refer to it as \"cash flow\". Basically, having your assets liquid means you can easily move them from place to place.", "Liquidity in the world of finance refers to how easy it is to trade an asset. If i want to buy groceries and pay...
How does the gas pump know when to stop automatically pumping?	[ "There is a small hole at the end of the nozzle that gives the pump a signal when your tank is full. When gas is flowing into your empty tank the pressure is the same. When it starts pumping gas and it's almost full the small hole feels a pressure change and stops pumping." ]
What is the point of internet contests, does anyone actually win?	[ "I won an Xbox 360 with Connect from an internet contest about 5 years ago, Mars candy corp I think. I entered like 20 times. It was legit, they just emailed me, I signed a form and they just mailed me the the Xbox.\n\nThen I sold it to my sister for $300. Best deal ever." ]
Cardio gets the heart working which ultimately makes it stronger. So why do recreational drugs that do the same thing cause harm to the heart?	[ "when you exercise your whole cardio vascular (heart,lungs and arteries and veins) system adjusts to get more oxygen into your muscles, and also more waste out. \nAll the components are working in tandem, increasing, decreasing and stabilising as required. \nIts a very nicely synced system\n\nwhen you take cocain...
When countries with different currencies trade with each other, where along the line is the currency actually switched?	[ "Generally when they agree on a price they include in what currency. If a German company wanted to be paid in euros then the American company would have to trade USD for euros at a bank, currency exchange business, or other businesses who offer the service and then pay.\n\nCountries do have reserves of foreign curr...
Caisson disease (the bends) and why the reverse doesn't happen (an astronaut going from low to high pressure)	[ "They're in a pressurized environment so there's no pressure change. Submariners don't get the bends either, for the same reason. \n\nAnyway the difference between space and sea level is only one atmosphere so it wouldn't be an issue anyway. You've done a one atmosphere change at something like ten meters underwate...
why can’t light stay still?	[ "Hello, so a quick disclaimer is I'm not a particle physicist, this has just come in my entry level to physics knowledge I'm trying to learn while working with biochemists.\n\nThe answer lies in the fact that light is massless (for all intents and purposes we shall assume this, it's a bit more complicated than that...
What happens when people fall asleep on their arm and it becomes unmovable completely numb?	[ "A nerve is getting pinched, blocking signal from reaching the brain. It's relatively harmless, but is uncomfortable (especially when your limb \"wakes up\", causing a flood of conflicting signals that were backed up to all get sent at once).", "Be careful with this. I did it at university (admittedly whilst very...
Why do german and scandinavian languages use different letters for ö/ø?	[ "swedish and icelandic use the ö/Ö\n\nhowever, a likely explanation is that Ø came from latin Œ (a letter currently used in french), and that the slash was just a different way to write it. as for why the difference, it's theorized that the Ö was used in old norwegian texts in order to distinguish between the short...
how the show moonshiners works and how it is legal	[ "* All they show is people hauling clear liquids around...that is not sufficient proof of a crime.\n* Large portions of the show could very well be staged.", "It's a docudrama - think of the individuals on the show as actors playing the part of moonshiners. \n\n(Source: _URL_0_)", "[anwer from last time I saw t...
How "clicks" become a legitimate form of profitability for websites	[ "Advertisement.\n\nThe general theory is that ads are worth more if more people see them. An ad seen by 1,000,000 people is more valuable than an ad seen by 1,000 people.\n\nIf an ad on your medium is going to reach more people, you can charge more to take the ad, so you make more money from ads.\n\nOf course, it's...
Why do we call illegal immigrants undocumented immigrants?	[ "No drivers license, no SSN, no finger prints, no shots, etc. Things required to have for work permit, green card, citizenship." ]
Health Insurance for those that have not elected in 2015	[ "If you want to get coverage for 2016, the exchange should be open til December 10.\n\nThe cost of coverage really depends on how much subsidies you're eligible for.", "I'm dealing with this right now. Last year I had to pay a penalty, on top of what I underpaid. \n\nThis year I adjusted my withholding so that ...
How does countries calculate its land area?	[ "These days the most accurate answer comes from GIS data. This basically describes the shape of the country as a polygon, i.e., a shape made up of a sequence of straight lines connected together. There's a (relatively) simple [mathematical formula](_URL_0_) to determine the area of a polygon. There are some mino...
why isn't hunting lions and other endangered animals banned world wide?	[ "Well, first off, lions are not an endangered species. Important to draw a line there.\n\nWhat makes a lion different than a deer, duck or elk? Sport hunting of animals is a pretty common behavior and there is nothing intrinsically different between any animal we choose to hunt for sport. The truth is that we ki...
Why is GNU Hurd development taking so long, while the Linux kernel reached maturity/usability fairly quickly?	[ "There's not one single answer, but a combination of different factors, which I'll explain:\n(1) Linux sucking the air out of the room\n(2) OSs becoming commodities\n(3) Poor performance tradeoffs in Hurd's design\n(4) Uncompromising stance of the FSF\n\nAt the time when GNU Hurd was being developed, most of the in...
Why don't snakes choke when they devour large prey whole / is it ever possible for a snake to choke ?	[ "Yes, snakes can choke. Sometimes they start to swallow a prey, and when startled or find that it is too big, they reverse the swallowing process. It's usually not healthy for the snake to do repeatedly, and can hurt the snake.\n\nAlso, snakes have a special extendable tube trachea they push forward to the front of...
How metropolises such as Phoenix, Tucson, Las Vegas, other southwestern U.S. cities, get enough water to supply the huge population with no lakes or rivers near.	[ "All these cities share water from the Colorado River under an agreement called [the Colorado River Compact](_URL_0_). it is carried through the area by pipelines." ]
How does Cadillac's "Super Cruise" autonomous driving work?	[ "The car looks at the road and it looks at you. \n\nIf it understands what it sees on the road, it stays in it's lane and a safe distance back from the car in front of you. It both steers and controls the speed.\n\nIf you stop looking at the road, it slows to a stop in its lane. It does not change lanes, or foll...
How reactors don't melt if stuff going on inside them hit millions of degrees?	[ "What's going on here is they keep the stuff that's millions of degrees from touching anything else, and they only use very very tiny amounts of the stuff they're heating up. \n\nThe most common way of doing this is to trap the little wee cloud of hot hot stuff within a very strong magnetic field. Because it's not ...

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