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Why does lifting weights make your muscles bigger? | It's not true that muscle cells divide and more and more are made. Muscle cells are generally not made during your lifetime, but instead hypertrophy and grow in size due to the stress placed on them during activity. They'll eventually have more mitochondria for better aerobic oxidation. Muscle cells can die, but they a... |
why can't planes have an enormous parachute attached to the cabin in case of emergency/loss of flight? | I think this will anser your question but essentially: > To safely bring down a big commercial airliner such as a Boeing 747 with about 500 people on board, there would have to be 21 parachutes each the size of a football field, says Popov. “It takes about a square foot of material to bring down one pound of aircraft.” |
Why we can't use salt water as toilet water? | Corrosion is a big issue with salt water lines, but there is another problem as well. Cities have a fresh water system which have fresh water reservoirs, water pumps, water towers, pipes, etc. The toilet water comes from that fresh water system. If we wanted salt water toilets, then the city would have to build a new a... |
If my fingerprint was never recorded, how can I be IDed? | This is true. If you were never recorded there would be no record. You'll be fingerprinted for almost any government job, any time you're arrested, or for certain types of background checks. If none of that occurred, then there would be no record. If in the show the guy they were looking for was former military or some... |
If we were to cover the ground with enough solar panels to generate all of our electricity, would atmosphere and ground not become substantially colder leading to new issues? | Not really. First, the best place to put such solar panels would be somewhere that you weren't using the land for other purposes. So you'd avoid building giant solar farms in agricultural lands and so forth. You'd put them on top of buildings, perhaps, or in deserts that get a lot of sun. And they might take some of th... |
T+2, as in "Funds will be settled into the nominated merchant account with bank on a T+2 basis" | For Reference - _URL_0_ T stands for "transaction" as in "the day this event actually happened". The "+X" indicates how many days after the "T" that the money/asset will officially change hands. So a T+2 transactions would mean that if you sold on Monday, the transaction would "clear" on Wednesday. |
What factors lead to fluctuations in stock prices? | Stock prices change because the perceived value of the underlying assets in the company. The basic way to value a stock is to look at future profits and adjust them for risk and how far they will occur in the future. This approach is roughly called "discounted cash flow." Anything that reduces future profitability or i... |
Who do transmission towers and cranes have bases that are narrower than the tower itself? | [Here] is a thread with a good explanation. Basically, the bottom of the tower is subject to a lot of forces, and the pyramid shape is stronger than spreading it out. |
what does 'innocent until proven guilty' really mean | True. A person is presumed innocent until proven guilty, which means that the burden of proof is on the prosecution to prove the defendant guilty, not on the defense to prove him innocent. Typically when a person is arrested and charged with a crime, they are either held in jail or allowed bail, basically handing over ... |
Exactly why do Buzzfeed and Gawker and Vulture and Vice and whatnot have names that invoke such negative implications? | Self deprecation is fairly popular these days. Vice is a little different in that it's always been a smaller media outlet. I've always thought of them as niche journalism though they've expanded considerably over the last couple of decades. The others are just click bait. It doesn't really matter what they're called be... |
How do the spiders in my basement survive considering there's no bugs for them to eat? | If there are spiders in your basement why do you think there are no other bugs for them to eat?There are no bugs because the spiders eat them …', "What makes you so sure there's no food? Not all spiders eat flies and birds. Some eat insects too small for you to see without a magnifying glass, others eat other spiders, ... |
How do geologist date the age of stone formations? | There are lots of methods, including isotope measurements like C-14. C-14 works for living organisms because the constant exchange of carbon means that the body contains the \'normal\' mix of carbons, but once the organism dies, it's locked in, and then the more unstable carbons decay into more stable carbons at a pred... |
How does google know how popular a place is from hour to hour. | The same way they know how fast traffic is moving. They collect gps data from every android phone and see that there's an increase in number of phones in that location at that particular time. |
Why isn't cryosleep (like in Avatar etc.) available (yet?) ? | The trouble with "cryosleep" is that we can't freeze a person fast enough. Unless a person is frozen VERY quickly, "ice" crystals form in their cells\' cytoplasm, causing those cells to rupture immediately on thawing . Theoretically, if we could freeze a person quickly enough, or after introducing some sort of chemical... |
Why do I feel grimy after a brief nap, but not after a full night's sleep? | Sleep happens in cycles and phases, a phase consisting from light restorative sleep to REM or rapid eye movement phases. When you take a nap for longer then 10-20 minutes, it goes into the REM cycle. The REM phase reacts badly when stopped abruptly much like a drop on a roller coaster. That's why the best amount of tim... |
Why do you sometimes wake up and your mouth feels fuzzy with bacteria, but this never happens during the day? | Eating, drinking, talking, and just salivating help wash clean mouth surfaces while awake. One would hope all of these are sharply reduced during sleep.You stop producing saliva when you're asleep . Saliva works to kill bacteria; a lack of saliva lets it grow with impunity. This is why, if you can only do it once a day... |
Why do your fingers hurt when they get cold? | Hypoxia, or oxygen deficiency, is painful. The blood vessels constrict in effort to maintain core temperature thereby decreasing the number of oxygen-carrying red blood cells to the tissue of the hands.It's usually because of the vessel constriction in the appendages, however, depending on how much they hurt you could ... |
Why is it that we can see dim light in a dark room better in our peripheral vision than when we look straight at it? | You have different things in your eyes called rods and cones. Rods are better at seeing in low light, and are generally around the outer part of your eye. Cones can see color, and are grouped right in the center. When you are in low light conditions you can see better if you don't look directly at something because wha... |
Why do animals sometimes break up fights between each other? | Because certain dog breeds are pacifists by nature. Just kidding, it's a show of dominance over both fighting animals by the animal stopping the fight. Basically the animal stopping the fight is saying "the only fighting will be done by me, and only when I feel like it so sit down and shut up!" It can honestly be sever... |
How come right when a wound or a scab is about to heal it becomes very itchy? | The physical stress of the skin stretching closed tickles the nerves that signal itching. Scar tissue being formed can also itch, due to its texture. |
What exactly does it mean to be double jointed? | It is an awkward idiom used to refer to people with hypermobility/hyperlaxity. Meaning they can flex joints much further than the average person canNo such thing as "double jointed" you dont have extra joints just the ability to hyperextend the joint in question |
Why is the standard of mass was named "kilogram" instead of just "gram" like any other units? | It appears on my limited research that gram was originally chosen as the base unit, but then it was decided to be too small so the standard unit was changed. And I suppose to keep it simple, instead of significantly changing the meaning of a word, a prefix was added. This video goes over the history of Kilogram naming ... |
How does the US Air Force determine which aircraft(B-1,B-2,B-52,F-16,etc) a target needs to be bombed by? | Mission parameters, cost, availability: The F-16 has a smaller payload capacity than a bomber. It's also cheaper and easier to maintain. If a target can be destroyed by an F-16 within mission parameters, then use an F-16 instead of a B-52 which will burn more fuel, require more maintenance, etc. |
How does a water softener work? | So you need to think of water like a bus. It cruises along inside of your pipes occasionally picking passengers up along the way . Now Calcium and Magnesium are bad patrons. They leave a film on the bus and generally make things work less efficiently because of their disruptive nature. As you can imagine this makes it ... |
How are viewership figures calculated for TV Shows and are they accurate? | Unless you are a household that participates in TV rating measurement , it does not matter what you do. A random sample audience is used to track statistics, and then that data is used to extrapolate nationwide viewership. Freeview sounds maybe like a UK thing, but it seems the UK does something similar: _URL_0_ |
How can tabloid magazines get away with making up embarrassing and shocking stories about celebrities? Isn't that considered libel? | It's libel if the claim can be shown to be untrue. If the claim is true, or cannot be proven false, it's not libel. And as /u/Melon-Tester says, there are ways of wording your article so it can't easily be proven false. Another trick is to make the claim in the form of a question: "Did Angelina Jolie snort cocaine?" Yo... |
How can medical professionals test for evidence of a heart attack after it occurred? | They use something called an Electrocardiogram to test for electrical signals from the heart, as well as drawing blood and testing cardiac enzymes which will show evidence of a heart attackIt depends how long ago the heart attack was, but you can often measure levels of troponin and creatine kinase in the blood which m... |
What material does an electromagnetic wave exist in? | No medium. Think of what medium a gravitational field moves through? It doesnt have a medium. A changing electric field creates a magnetic field next to it. That magnetic field creates an electric field next to it, and the energy of an EM wave travels through these self-creating fieldsThe electric and magnetic fields a... |
Why did people in places like Africa develop darker skin when black absorbs the most light compared to lighter colors? | Dark skin is caused by melanin. When the sun hits your skin it gets absorbed by melanin and not by your skin cells. This is a good thing because if your skin cells absorb the sun it can cause damage that can possibly lead to skin cancer.Darker skin has high concentrations of melanin which can help to protect against UV... |
Can someone explain Linked-Lists in C to me?? | A linked list is like a treasure hunt. Every location you get to, you find a piece of candy and a clue as to where to go next. |
Why's it so important to have intake ventilation for attic fan? | When you turn a fan like this, you can definitely feel a pressure change in the house. It sucks fresh air through the ventilation aka windows into the house. Without proper ventilation, your fan will not work efficiently. I googled a specific danger example:Turning on a fan without proper ventilation can cause the fan ... |
In films such as Horatio Hornblower from 1951 they have amazing live action sailing footage of old sailing ships. How did they make them so realistically? | They used real ships. :) Even today, there are a number of people and organizations dedicated to preserved old sailing vessels, and many ships of this type still operate, mostly for recreation or tourism, around the worldaccording to the wikipedia entry for the movie "captain horatio hornblower" they filmed those exter... |
How colorizations work when people colorize black and white photos. | Basically, if you take a paint brush in Photoshop, guess the color that most accurately represents the skin tone, and lower the opacity , you can achieve colorization by painting over the image. Black and white photos have all the shadows, so it's just a matter of accurately guessing the appropriate colors and carefull... |
What is the Kaaba? Why is the rock so special? | IIRC, The Kaaba is a building said to have been built by Abraham and his son to house a rock from Heaven brought to him by an angel. |
Why do our taste buds change over time? | Repeated exposure and your taste buds dying, basically. As a kid you're primed to like sweetness and hate bitterness because sugar = energy to keep you alive and bitterness = poison that can kill you. Once you get older, you become more adventurous with your food choices largely out of necessity - I hate salad, and alw... |
Chronostasis.The phenomenon of ''Stopped second-hand ''. | Your eyes move in small "jumps" called saccades. During a saccade, you are effectively blind, since your brain "throws away" all of the information coming from your eyes while they're moving . But I'm sure you 've noticed that you don't appear to go blind every time you move your eyes. The reason is that your brain tak... |
How your drink can go down the wrong pipe? | No it is in fact the case, your throat goes to 2 places, your stomach and your lungs. There is a flap that decides where the contents are going, and on occasion you will come close to sending liquid into your lungs. Of course your body realizes this and coughs it up rather violently to ensure it doesn't happen. |
how do SSRI's cross the blood-brain barrier and inhibiting the reuptake? | SSRI stands for selective serotonin reuptake inhibitor which actually does a lot to explain what it does. First of all, many molecules can cross the blood-brain barrier, they can do so by either using existing channels in the barrier by being similar in structure to things we need to get to our brain, or by being able ... |
Is it as dangerous for animals to eat raw meat as it is for us humans? | Animals can and are frequently harmed by pathogens in the food they eat and humans both in the past and the present enjoy the eating of raw meat, including raw, or hardly cooked mammalean meat regularly without significant harm. Humans are a bit more succeptable to foodborne pathogens, largely because our guts have ada... |
USB-A vs USB-C vs USB 3.0/3.1 | It's backwards compatible in the sense that the protocols work together. They don't **physically** fit together. The USB-C standard carries *a lot* more pins designed for extra USB-C specific services and features. So yeah, you do need an adapter. The nice part is that adapters can be relatively cheap and simple since ... |
Can you fire someone for having cancer? | If you actually say it like that, then hell no. But if the person with cancer is missing work without calling in, staring off in extreme pain instead of working, or depressing customers to the point that they leave, you can fire them for that. Although they have a decent chance of winning a lawsuit against you if you d... |
Why do news and other websites need me to allow 34 scripts to watch a video. | Two broad brush reasons. 1) Developers are lazy and often just grab something that they think works and run with it. They don't notice that it is pulling in stuff from 7 domains and that stuff pulls in more from 27 other domains. 2) As others have noted, pulling in ads and/or doing data collection or analysis to push m... |
Why do gas stations charge extra for using credit/debit when it seems no one else does? | Visa/MasterCard does not allow their merchants to charge more for credit transactions. It's a blacklisting offense that will get you banned from taking cards. However, the gas industry resisted credit cards for a long time due to their very slim profit margins. V/MC wanted their slice of that pie, because gas is a grea... |
google adwords v google advertising | Google adwords is the practice of paying for "keywords" to rank in search results. This has become extremely sophisticated with the tracking capabilities. _URL_0_ was always a great tool to get an estimate for how much a specific website is spending on adwords. You may want to investigate seo as well as adwords. At a h... |
Could state level laws overrule things like SOPA? | Look at the 14th amendment. Passed after the Civil War, the States have to do what the Fed saysNope. Look at how the marijuana issue is handled. California has basically legalized it, but the feds are still shutting down legal grow ops and dispensaries weekly. The feds will do what they want regardless of state laws. O... |
Why in the middle of winter, it's usually colder when it's sunny and warmer when it's cloudy but in the middle of summer, it's usually the opposite ? | Not an expert, but IIRC The clouds in the winter hold in the heat from the sun creating a greenhouse effect increasing the temperature a small amount. The clouds in the summer block some of the sun's rays and cool you off. Hope that sums it up! |
How would a smart phone go about orienting itself in space? | Gravity can be sensed in a couple different ways. one way used to be with mercury switches, which are now banned from use. Another way may be the orientation of weights- like a ball on a string always points down. Another but least likely way is pressure from weights. In space, however, there is no gravity. It's like t... |
Why are defendants who are found guilty (and didn't plea guilty) not also charged with perjury? | The Pennsylvania Constitution states: > In all criminal prosecutions **the accused hath a right to be heard by himself and his counsel**, to demand the nature and cause of the accusation against him, to meet the witnesses face to face, to have compulsory process for obtaining witnesses in his favor, and in prosecutions... |
How does a split-brain work when the corpus callosum connecting the two brain halves has been removed? | While the corpus callosum itself has been severed, both sides of the brain still have their connections to the rest of the body. As a result, activities originating in one side of the brain but not the other can't really interact, as demonstrated in [Sperry's experiments], but those activities can still be carried out. |
How does the fourth dimension work? | You will often hear that *time* is the fourth dimension, and this can be true in some contexts, but I assume you're referring to a fourth **spatial** dimension. I've had to work in 4 dimensions from time to time, and trying to picture it can be very difficult. In my work, we usually accomplish this by displaying 3-dime... |
Why does water expand when it freezes. | Water molecules are made of an oxygen atom between two hydrogen atoms. They aren't lined up straight; they're bent at an angle, like a noodle of macaroni. When water freezes into solid ice, these macaroni shapes arrange themselves into hexagons, as shown in [this image]. The empty space in the middle of each hexagon me... |
purchasing power parity (GDP)? | Say you live in the US. You make $100,000 a year. Now say you live in China, but you make $50,000 a year. You could say that the person living in the US is twice as rich as the Chinese person in absolute terms. But consider that lunch costs $10 in the USA. It costs $1 in China. So an American can buy 10,000 lunches wit... |
Why do TV shows have loud intros? | I assume it's simply to: * be distinct and memorable * notify occupied people that their preferred TV show is starting |
Why is it that when I Google image search "flag of Spain", many different flags come up? | Spain has had many different flags in the recent past. It had a different one shortly after Franco's death, a few different ones under Franco, a different one before Franco, etc. |
how do surgeons make incisions without cutting nerves? | They study for years to make sure they know where the major nerves are. Some minor nerves do get cut - and to some extent they can regenerate, though slowly. The one cut when I had surgery under my jaw took 20 years or so to reconnect!', "Surgeons study anatomy to know where the major nerves are. Surgeons are trained n... |
How do music streaming services pay artists? How much are artists paid? What is payment based on (number of plays, etc)? | They know what people are playing and they compile costs based on play count and cut checks to the labels on a pre-determined basis. Sometimes rates are different based on quantity and such. It all differs, but most services pay standard rates that are set by law. Sometimes companies pay different rates depending on if... |
Why water feels like cement after jumping from a really high height. | It takes a great deal of force to compress water. When you jump into the water, mostly it's getting out of your way rather than compressing. If you're moving too fast, then the water molecules can't move fast enough to get out of your way, and they won't compress. You hit a bunch of molecules that don't move, so it mig... |
Why do we hate hearing some sounds (e.g. nails on a chalkboard, fork on a plate, styrofoam against styrofoam)? | The sound frequencies they produce are disturbing to the ear. Humans generally dislike sharp frequencies and disturbed frequencies. As nails scrape against the chalkboard, the fingernails hit small cracks in the board which slightly alter the frequency of the sound. That's not something that humans typically enjoy. The... |
Why is it socially unacceptable or frowned upon to drink/eat soup out of a straw, yet using one to drink a beverage is fine? | Soups are chunky bro. [At least man soups are.]', "Customs simply haven't evolved enough tolerance for this behavior, just as they had not for having elbows on the table at meal times a few years ago. However, the behavior might seem 'weird' to some people because of the perceived inefficiency or danger of drinking sou... |
The economics of running a cemetery. | If they are smart they take a portion of each plot sale and put it in an investment account. So if you pay $100 for your plot I take $10 profit right away and put $90 in an account. That account earns me interest, say 5% so every year I get $4.50 interest from that account. Hopefully it costs less then $4.50 to maintai... |
Why do some sports games and programs start at random times like 8:49? | I'm not entirely sure, but with sports, I wouldn't be surprised if the reason is so broadcasters can do pre-game previews and stuff before the game starts. |
Why are the bodies left on Mt. Everest and are not returned to the families? | Summiting Everest requires a great deal of money, and it's quite treacherous. Every corpse you see on Everest is someone who died on the way to the summit or on the way back. It's hard enough to do it carrying all of the gear that they have to carry. To attempt the same feat carrying a dead body along the way? Most peo... |
Why is force defined as mass x acceleration instead of mass x velocity? | > If an object is moving at a fixed rate of speed , the acceleration would be 0, yet it would still have force. But an object moving at a fixed speed doesn't have any forces acting upon it . Why do you want to redefine physical units? |
what does it mean when a country "devalues" it's currency? | It means that one day one day the Fakeland Dollarpound is worth one US dollar, and the next day it's worth 35 US cents. Obviously that will make Fakeland's exports way less expensive, and anyone owing debt denominated in Fakeland currency will be laughing. BUT, all of a sudden your Dollarpounds pay for far fewer import... |
Why do countries have different names for one another instead of using that country's local name (or something close to it) for itself? | Have you seen the top post at /r/mapporn? It's about all the different names of Germany. Countries are named in different times and from different point of views. Before Deutschland was named Deutschland there were already a whole lot of names for that region. Germany after Germania, Saksa after the Germanic tribe the ... |
. How does your body make you sleep so much when you are ill? | Your wanting to sleep is regulated by a chemical in your brain. When your brain feels it's better off sleeping to deal with an illness, it makes more of the chemical. So you sleep more.there are several molecular pathways from inflammatory response to change in behavior in animals the initial response is driven by prin... |
Why are some people so against circumcision? | Generally people who are against circumcision don't have a problem with it if there is a genuine medical need for it, or if an adult chooses to be circumcised. Circumcision may not be harmful, but it's still permanently altering someone's body. Usually surgically altering a person's body without their consent or a vali... |
How a digital gyroscope works | These devices usually have microscopic vibrating structures inside a silicon chip, like tiny tuning forks. They tend to keep vibrating in the same direction in space even as the quadcopter turns. So if the electronics set one vibrating say, from front-to-back of the quadcopter but they start to detect vibration from le... |
The difference between current, amperage, and voltage | [Never seen it put better and simpler than this. ]Electricity is electric charge moving through stuff, the charged bits that get piped through wires are electrons. Amperage is a measure of current, that's how much charge is moving through a component. It's sort of analogous to how much water is flowing through a pipe. ... |
Why is "it's" so commonly grammatically misused over other function words like "your vs. you're" or "a vs. an"? | People get confused because the 's declares ownership as that is what we have been taught. So when some people see its ability, they process it as it having the ownership of the ability hence using the apostrophe and writing it's ability. |
What are the benefits of salt grinders? | Aesthetics. It allows the salt and pepper grinder to match more closely since they now have similar mechanisms in them. Also, to some extent, you can choose grind size as others have mentioned, but that relies on the grinder actually having a grind selector. But it's more reliable to simply buy salt with the desired fl... |
How does the shoulder joint work? | I'm not sure if "complex" is the right word, but the shoulder joint is the most flexible in the body. The shoulder joint is what's known as a ball and socket joint. The ball of your arm bone is nestled into the cup or socket of the bone in your torso. The same is true of your hip bone. What makes the shoulder unique is... |
USA Healthcare system costs. | ObamaCare, while an improvement, is still nothing close to what most of the developed world gets in terms of access to affordable healthcare. It basically compels more employers to provide insurance, and it offers group buying plans for those without access to employer plans. It sets rules for who and how the insurance... |
Why do I feel like a bug or something is on me after I see a bug on me? | Because you are paranoid of having a bug on you, your mind becomes more focused on the skin. It is a mind thing, because you think their are bugs on you, you will feel bugs on you. |
Where did the generic doorbell/clock melody originate? Why is it used around the world? | It almost certainly got its popularity from being what the [Westminster Clock Tower plays], which was inspired by the church of Saint Mary the Great in Cambridge. Where it came from before that I don't think anyone knows, but building melody patterns out of different permutations of ringing a small number of bells is a... |
How do people find seemingly impossible Easter eggs in games? | They sometimes find them by accident, but in most cases they look at the code that makes the game work and find something in the code that makes no sense. For example Let's say that you are looking at a code for a shooting game. You are looking at the names of the guns and you say "BFG" in the names, but have never fou... |
why do some foods like apples cause me to get hungrier? | The sugar in an apple causes a spike in blood sugar level and insulin. When the subsequent crash takes place, your body tells itself it is hungry in an attempt to normalize the blood sugar level again. Vicious cycle. |
What are Imaginary Numbers, exactly? | A Visual, Intuitive Guide to Imaginary Numbers: _URL_0_', "Mathematicians like to solve equations; that's just what they do. And for *most* equations, that's pretty easy. E.g.: X + 4 = 10. Therefore X = 6. The idea is that *no matter what* equation you write, mathematicians want to come up with an answer. But what happ... |
How can children watch the same movie (or any other content) over many times without getting bored? | Uh Children? I 've seen "How to Train Your Dragon" at least a dozen times, and I'm 59 and live alone.Kids don't grasp and comprehend plots as quickly as adults. They are also easily distracted. So they glean more content upon repeat viewings than you as an adult would. Their understanding of the movie as a whole builds... |
How did people before the invention of toothpaste keep proper oral hygiene, if at all? | Toothbrushing tools date back to 3500-3000 BC when the Babylonians and the Egyptians made a brush by fraying the end of a twig. Tombs of the ancient Egyptians have been found containing toothsticks alongside their owners. Around 1600BC, the Chinese developed "chewing sticks" which were made from aromatic tree twigs to ... |
Why are some hospital liquid medications that come in pouches brighly colored (neon colors)? | Depends on the drug; I work at a children's hospital and many drugs do not come in a liquid form but kiddos can't swallow pills. We have very specific recipes that we use to compound the drug into a liquid or emulsion. Dipyridamole comes as a white tablet but when you crush it using a mortar and pestle the inside is br... |
why is it ok to dig up human remains buried long ago, but not ok/acceptable to dig up more recent generations human remains? | Because most people would be concerned if their mother was dug up and moved without very good reason, but wouldn't even know where their great-great-great-great grandmother was buried - or even who she was. |
How does Google's Magic Leap, visual technology work? | It tracks things in the picture to create a frame of reference and then track them. It then renders an image over the display. |
What does it mean when divers suffer from "the bends"? | The bends is an informal name for decompression sickness, which can happens if divers ascend too fast after spending time at depth. As divers descend, the pressure increases, and so does the pressure of gasses in the diver's lungs, which means the diver's blood can hold more dissolved gas. When the diver ascends, the p... |
Why does the box say to make the oven hotter if I want a softer crust on my frozen pizza? | This is why you should read cooking instructions carefully. For the soft crust, the instructions will tell you to place it on a cookie sheet, thus avoiding direct heat. Usually, they either tell you to use a hotter temperature or just an increased cooking duration, your brand choose the formerTo make it simple and quic... |
Why do we have a preference as to what side we sleep on? | We are not symmetric. The heart, stomach, and the other intestines get different working conditions. Liquids and gases will be on the respective other side . Pumping from above or from below is different for the heart. Some organs might have to work uphill. |
anyone know how to calculate how much force a car exerts on a human body when hitting a running pedestrian? | Short answer, it is very difficult - there are lots and lots of variables at play, that you would have to model mathematically. This is one of the reasons that they still use crash test dummies and physical tests in the automotive industry. For collisions in general, the procedure usually relies in "conservation of mom... |
Why do spaces turn into %20 when typing websites into the browser address bar? | URLs are not allowed to contain spaces. Trust me - it makes life a million times easier for programmers. If you want to access a resource that has spaces in it's proper name you need to use an *escape sequence* to put it in there. The standard used for escaping characters in URLs is to start with a % character and then... |
Why are models of our solar system always shown with the planets rotating the sun in a 2D plane? | For the most part they do rotate in an almost 2D plane. I think Uranus's orbit is slightly skewed from the rest of the planets, but for the most part it's the most stable orientation. It's kind of like how Saturn's rings are all settled in a single plane as they orbit around the planet, due to the gravity of the debris... |
What companies like Goldman Sachs do? | They are brokerage houses, they enable consumers to buy and sell stocks, mutual funds, bonds, etc. Goldman in particular caters almost exclusively to high end customers, a few million and up. |
What happens in your body when you instantly sober up after witnessing something traumatic if all the alcohol is still there? | It’s all about the adrenaline. You’re not actually sober but adrenaline causes you to be more alert and have extra energy giving you the sense of being sober. |
How are gamers able to find glitches to do speed runs? | brute force. Tons of people playing the same game for hundreds of hours, things will be found. A lot of the ways, they can tell how the physics in a game work and can think to themselves "oh, how would this bit of physics work here", and then they break the game through that. Other times, its pure luck |
What makes a person's voice sound so weak and "shaky" when they're old? | As you grow older the organs in your body become less efficient and it compromises their performance. The same holds true for your vocal chords. You can see this in singers as they get older. Their voices mature and start deteriorating past a certain point. Cigarettes and alcohol also speed up this decline . _URL_0_ Ed... |
How do radio stations get traffic reports? | * Call in tips * Live Cameras on some roads * Communication with the police / transportation authority for accidents, incidents and construction. * Google maps * Airplanes and helicopters These are the main ones and aside from google most have been in use for decades. |
Why are the effects and graphics in animations (Avengers, Matrix, Tangled etc) are expensive? Is it the software, effort, materials or talent fees of the graphic artists? | Former Digital FX Supervisor and 18-year veteran of the visual effects business here. Hopefully this doesn't get lost in the depths here The biggest expense in the visual effects business is people's time. ~80% of a budget for a VFX company goes towards paying salaries. Making movies full of things that don't exist is ... |
If rain is a result of the water cycle, why do we have more rain in the autumn and winter when evaporation is presumably lower? | First: This is not true for a lot of places ) Second: For it to rain you do need water in the air - but you also need that water to condensate. There are certain things that will make it more likely to rain, that means favour condensation of water vapour into liquid water . * the amount of humidity - more the better* t... |
Why are stores and restaurants on the east and west coasts of the US so different? | It can be difficult for a store to expand into a new market if already dominated by competitors. For example Wal-Mart is also notably weak in Minnesota, because it's the home of Target who already dominated the department store market. Some chains have a huge following in their home region but haven't expanded like In ... |
why isn't happy hour one single hour? | Because it is hard to drink enough in one hour to wash the smell and taste of Corporate America off of you.The term happy hour goes back a long way, and no one is really sure where the term comes from as applied to drinking. It was a term for an hour of exercise, used by Navy sailors in the 1920s and has been used as f... |
Why do they call it FAPing? | "Fap" is internet short hand for masturbation. It is an onomatopoeic reference to the sound of a man masturbating . Since many of the leaked photos were nudes or otherwise sexual in nature it is assumed they were used for masturbationThe terms "fap" and "shlick" both originated with the highly NSFW web comic [Sexy Lose... |
What's preventing world peace? | Lack of education, stupid politics, religions, greed, natural resources. Hard to tell. People are assholes. |
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