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How does EZPass prevent theft? | Saying 'can't someone just tag it' simplifies it WAY more than it would actually be. Depending on what state you're in, you'd need hardware that could read either a barcode or a microchip. You'd need to know how to interpret what's ON the barcode/microchip into more than just a string of random numbers. You'd need acce... |
If water is more dense than air, then why does sound travel faster in water? | Think of it this way, You have a bunch of people standing next to each other. In one group you have people tight together holding hands. The other group you have people standing a few feet away from each other and not able to hold hands. In the first group they have to send a hand squeeze down the line as in when one p... |
Where did the ?? Profit come from? | South Park, an American animated tv show, ran an episode featuring the "underpants gnomes", a race of gnomes who obsessively collect underpants. They work in unison to complete their plan: 1. Collect underpants2. ???3. Profit! Unfortunately, none of them knows what the second step is; they just assume that there must b... |
Is there any chance of finding substances on other planets that are completely new colours that we haven't experienced before, and would our eyes be able to recognise it? | There aren't going to be frequencies of light that are completely outside of our well understood physics, no. There are all sorts of colours we can't see, but that's not the same thing. Ultraviolet, radio waves, infrared, microwaves, etc: all 'colours' of light that we can't currently see.Yes and no. All colours we can... |
Why when I have a bruise or cut causing discomfort do I feel the need to constantly mess with it causing more discomfort? | It's a stress reaction. Medicine is a relatively recent development versus millions of years of being alive and being injured. Animals tend to 'fuss over' injuries, cuts and wounds. It lets us keep constant watch on them and decide if there is a course of action that may give us a better chance of survival. Additionall... |
Why do we excrete water? | Actually, the amount of urine we need to flush away waste, coupled with our ability to sweat, are two strong indicators that humans evolved in an area with plenty of water available. Our kidneys never needed to evolve to conserve water, so they don't. Compare that with cats, for example. Cat urine is extremely concentr... |
why "pink" was listed as a possible eye color on my DMV form | Well technically they don't have pink eyes, that would imply that the pigment on their iris is pink or red. Albinism is a pigment defect, so their iris is actually nearly clear, but it looks pink or red since you're seeing ~~their retina~~ the light refracting off of the blood vessels on their retina. Edit: clarificati... |
Why do animals scatter away from humans but allow other creatures to hang around or pass through? | They aren't reacting to you as a human. They are reacting to you as a threat. Animals, especially herd animals have what are called fixed reaction patterns and react to movement that is too slow, as stalking, or too fast, as charging. As animals not native to most habitats, human activities will be perceived as too fas... |
How did FDR serve as the president between 1933 until 1945 if you can only run for 2 4 year terms as president in the US? | 2 terms was a tradition set by George Washington but not the law prior to FDR. It was only after his death did it become the 22nd amendmentThat restriction was added by [a constitutional amendment] after FDR, precisely to stop an FDR-like streak from happening again. |
The war in afghanistan. | There is a good answer in one of the previous times this was asked: _URL_0_ You can post here if you have additional questions after reading that though. |
In nature documentaries, how do they get the sound of the animals being chased from so far away, while not getting any sound from the helicopter they're filming from? | It's often edited in using sound effects. When it's done well, you can't notice. When it's done badly it's cringe-worthy and annoying.A lot of what you hear in documentaries has been dubbed with sound effects.It's edited. The BBC have been accused of using audio samples for documentaries. There are many scenarios in wh... |
How does emotional association work? | Essentially, your brain grows in response to your experience. TS;WM Your brain is made up of cells. Some of these cells are called neurons. Neurons are cells that fire a jolt of electricity in chemical form through the axon, which is a long, thing tube-like structure. These chemicals have charges, which is what allows ... |
Why wasn't Obamacare passed as a single-payer system? | It had to do with Congress. In order to get this passed through congress, Senate Majority Leader Harry Reid took Single Payer and Public Option off the table in early negotiations. This was more to appease the conservative Democrats who felt they would not be re-elected if they passed "socialism" like this . This left ... |
It seems that HIV is more prevalent among African Americans. Is there any reasoning for this? Correct me if I'm wrong. | I seriously think it's heavily related to African Americans just using less protection. While someone saying that it's because they're poor isn't really wrong, it's more specific that they just use less protection. African Americans have a higher occurrence of other std's like HSV. While the numbers are there it's cert... |
Why do remakes of games take longer to release compared to a new game entirely? | I don't think this is generally true, it's just two particular games that are taking a long time to develop. In FFVII's case, the original was a big game. By the standards of the day it wasn't that hard to make a game that big. The graphics were simple, so it didn't take that much time and money to make lots of enemy t... |
Why electronics stop working at low temperatures assuming it's not running on batteries? | I have a College Diploma in Electronics Engineering so I guess this is my field. The simple answer is that the electronic components behave differently when they are outside of their acceptable temperature ranges. For a more complex answer you need to realize that a typical electronic circuit is mainly made up of wires... |
Why is it more acceptable to eat under-cooked beef than other meats? | because the bloood is manly. and people eat fish raw. no one eats pork/chicken raw b/c of increased risk of bacteria. |
- Why do old people smell bad/different? | Less bathing. Many have difficulty getting into a non accessible tub or just fear slipping in the shower. I did an energy audit at an elderly housing facility once and like half of the showers/tubs were used for growing plants or storage meaning the occupants of those units literally never bathed. Building water use wa... |
Why do gruesome videos/pictures give us such a rush and make us unable to look away? | Well I think it naturally causes adrenaline to pump in our bodies from seeing such gruesome things. Not necessarily that we are terrible people but that our bodies understand what death is at a subconscious level even if we don't purposefully think about our own demise. |
Why is it so hard to legalize medical/recreational cannabis? | It's hard to legalize medical cannabis because the evidence for medical cannabis is mediocre at best. Even if it did show promise, it definitely wouldn't be given out as dried for smoking purposes, the would isolate and purify the active ingredients and precisely dose them in either pills or a liquid. As for why it's h... |
What is airplane de-icer made of and how does it work? | It's mostly propylene glycol or ethylene glycol, the same stuff found in car antifreeze. It lowers the freezing temperature of water. Same concept as salting the roads to keep them from freezing over.It is typically propylene glycol, very similar to the ethylene glycol mixture you may have in the windsheild fluid of yo... |
Why do native Spanish speakers often type in all caps? | A better question I have is why ~10,000 people are watching that and and why there are 2-4 comments every second. As for why many are using caps, so do a lot of English speakers like "OMG CHLOE, DEREK JUST ASKED ME TO PROM!", it's a way to show excitement, going above just an exclamation mark, as that is also used when... |
Why are we publicly shaming Dr. Walter Palmer rather than the tour guides that lead him to kill this lion? | Because the guides were Nigerian and publicly shaming them in the US would have very little effect. They are also being charged with serious crimes, whereas Dr. Palmer so far has not had to face the legal consequences of his crime.Because first of all they have already been caught and are going to have a trial, and sec... |
What happens to the old pavement when a road gets repaved? | The term you are looking for is asphalt recovery. Google has lots of very detailed information but in a nutshell yes there are machines and processes for recovering parts of asphalt roads. There are also asphalt and concrete recycling facilitiesSometimes they just grind it. At my job they replaced the road and gave us ... |
In some film credits why is the actor as playing their character(as themselves)??! | In the IMDB, you mean? That's because sometimes an actor may use more than one name, or it may have been spelled wrong/differently. So an entry will read, for example, John Actorname - Joe Character . |
How do companies find music and software pirates? | Torrents let you see who else is using the torrent. Companies hire people to connect to torrents and collect the IPs of the other people sharing that torrent. |
Why am I more sensitive to pain when it's cold? | Take a grain of salt with this, but I think it's because your body is busy sending blood to warm its core. Injuries that demand blood are more likely to stimulate pain-detecting nerves in the time it takes for your body to treat the injured part. I'm not into anatomy though. Source: me", 'your not, you just notice the ... |
Why does medical school/law school cost so much while PhD programs usually grant stipends? | With many PhD programs, the student is both learning the science and producing research. Professors are often paid both with salaries and with money from their outside funding . To keep outside funding, professors have to produce research, and they can only do this if they have students or if they pay someone to do it.... |
How do online redeemable cards know what is and isn't available? | Because there is 15 characters afaik. Which means there is 437 893 890 400 000 000 possible combinations. Chances of you getting one that is printed and set as redeemable and then not already redeemed is insanely low. You'll more likely win a lottery and then be able to purchase the gift card. |
What's the deal with Dennis Rodman and North Korea? | He thinks he's making a difference by trying to play the role of a benevolent basketball ambassador. I have no doubt that Kim Jong-Un would imprison or ban him from the country if he steps out of line. |
why don't window blinds have one pull string instead of two to prevent uneven blinds? | There has to be a string on each side because trying to pull them up by the center would mean flopping to one side. To have them controlled by one string, you'd have to tie the side strings together. It'd be impossible to ensure they'd stay exactly the same length because the strings stretch a bit. |
How do addictions work? | Drugs generally alter brain chemistry. When you take a drug for an extended period of time, your brain compensates for this by increasing and/or decreasing certain chemicals so your brain can func |
How does Shutterfly make profit when it gives away so many discounts and free things? | Hi, I'm going to offer you this pen! It's originally $100 but I'll give you a 90% discount. It's yours for the low, low price of $10!", 'It's a combination of higher markup than the discounted price and/or using the discounts as loss-leaders. A loss-leader is selling something at a loss and relying on people's impulsiv... |
what is Coulomb's force? | Yer not alone in askin', and kind strangers have explained: 1. [ELI5: Coulomb's Law ] ^1. [ElI5 Coulombs law ] ^1. [ELI5: Coulomb’s Law] ^1. [ELI5: Explain Coulombs law ] ^ |
What process has happened over the years that makes things I found as a child hilarious to me then but now not finding them as humorous. | You've developed more sophisticated tastes. Maybe not much more sophisticated, but still, at least a little. You've seen things that are far funnier than simple rude jokes or silly cartoons, and you've also seen so many rude jokes that the idea has gotten old. |
Why are motorbike gears arranged the way they are? | It's a safety feature. It makes it so the rider doesn't have to worry about finding first gear. If you had to shift up into first gear, you may forget which gear you are in and accidentally shift all the way down into neutral, causing you to fall in a tight corner. |
why are ER vets so much more expensive than your regular vet? | For the same reason a 15 minute ambulance ride can cost $1000. You aren't paying for the service as much as your are paying a bunch of highly trained people with expensive equipment to sit around and do nothing until you need them. |
Why was the bible followed more than any other book at the time? | There are two parts- old and new testament. Broadly speaking, Old Testament was followed because the Jews killed everyone else and managed themselves to survive till Roman Times - this is recorded mostly in Genesis, Exodus and then the prophets. The New Testament spread as much as it did because Paul the apostle moved ... |
Why is it common for women to get a UTI after sex if they don't pee after, even though their vagina and urethra are separate? | They are separate but close enough together that fluids can get in there and the motion can irritate the urethra. Also the urethra some women have is very short making them more prone to infection; peeing helps get stuff out.Edit: I don't word well. |
Why can't we just "seal" active volcano craters to stop them? | Volcanoes don't burn because they are on fire, they burn because they are hot. 'Sealing' an active volcano would go down about as well as putting a lid on a saucepan of water without taking it off the heat. |
Why a girl's period synchronises with other girls when they hang out. | They don't. It's been proven to not be true. Women's cycles are varied from girl to girl . It's inevitable in such a short cycle that they'll synch up from time to time and the combination of that chance and confirmation bias led to this myth. |
Why do our bodies ache when we have a fever? | When you have a fever, it means your body is fighting off an infection or some disease. It does this by going through an "inflammatory reaction," so you feel your forehead get hot. This reaction is occurring all throughout your body, though, which is why you get aches everywhere else while your body is fighting a war i... |
how did they resuscitate people before CPR? | Basically, CPR is just a standardized form of a procedure that has been done for a long time - in 1740 the Paris Academy of scientists officially recommended mouth to mouth resuscitation for drowning victims. People knew that giving breaths would save people, but when they discovered that chest compressions could save ... |
Why was Obama so adamant about fast tracking TPP trade bill? | Obama believes that the TPP is in our long-term strategic interest to ensure strong ties with SE Asia while undercutting China , and that it is not realistic to negotiate such a large and complex deal without fast-track authority. Basically, no one doubts that if the discussion is about the TPP's effects on "the US eco... |
How are icicles formed? | The air is cold but the roofs are just warm enough to melt the snow. Water drips down and part of it freezes along the way and you get an icicle |
Where do all the massive amounts of bones and skulls come from in major catacombs such as the ones in France and why did people use these catacombs instead of conventional graves? | They didnt get put in the catacombs right at death. They'd get buried first, but graveyard space was limited and when people were buried, it wasn't for forever. After a few years, those people were dug up and their bones were put into the catacombs for long term storage. So when you see the massive numbers of skulls an... |
Why do I never like a song the first time I hear it it, but do after several listens | It's called the "Mere Exposure Effect" Its when repeated exposure to a stimulus, regardless of its effect on you makes you more likely to tolorate, then like the stimulus. This actually works for music, movie genres, tv and just about anything. It's all derived from an evolutionary basis where previously experienced st... |
Why does Java want to make changes to my computer so often? And what are those changes? | Java, like Flash, has the extremely difficult task of "run arbitrary un-trusted commands off of the Internet but don't let it do anything bad" for some nebulous definition of bad. Every time they find something bad that can be done by Java running in your browser, they have to fix it so that it can't do that any more.E... |
why is there so much opposition to ride sharing services i.e. Uber and Lyft ? | Well, obviously the incumbent taxi companies would be opposed. But there's a secondary issue. In regulating the taxi industry we are insisting that they meet certain requirements that private vehicles may not have. Certain forms of insurance, vehicle inspections, safety equipment and things like that are all verified w... |
Okay, so most of our bodies are covered in fine hairs. But why have the tops of our heads, armpits, and genital regions evolved to have more hair? | Armpits and groin hair catch pheromones. We have an unconscious attraction to the scent of the opposite sex. Top of the head is probably just for display. Just like some birds have flashy feathers, we have hair. Considering how much attention a persons hair can get a good question would be which set of hair is more eff... |
Why we have "Shower thoughts" | You're in a box with nothing to look at and nothing to do, so your mind wanders. The only other time you have that is lying in bed, and people do have a lot of interesting thoughts when in bed, but you're usually sleepy. Also sometimes people have those kinds of thoughts while on the toilet, but people often keep a boo... |
What does the process of inventing an entire new language like Klingon or Valyrian look like? | I think you have to start with the sounds . Most authors who created fictional languages, such as Tolkien, found inspiration in languages they liked, which they did not always talk themselves. You also need an alphabet, and it can be more or less cryptic, depending on what you like. If you want it to be relatively easy... |
Why does cold water feel more hydrating than hot - or even room temperature water? | I don't think it necessarily feels hydrating. It may feel refreshing to drink cold water, but it hydrates you just the same. |
Why does our eyes move rapidly during R.E.M. and what purpose does that serve? | So, during REM sleep it's generally believed that you are probably dreaming you just don't remember the vast majority of it). The reason your eyes are moving is that they're one of the muscle groups that aren't paralyzed during REM. If you were to measure someone's muscle activity electrically while they sleep, you 'd ... |
How do diet pills work? what are they made of? | Diet pills typically contain 2 types of ingredients: stimulants and appetite suppressants. Caffeine is the most common stimulant, although they may contain others. Basically, they force your body to use more energy - ie, to burn more calories. Appetite suppressants block your hunger signals, so you're less inclined to ... |
When do I use whom instead of saying who? | _URL_0_ _URL_7_ _URL_1_ _URL_4_ _URL_6_ _URL_5_ _URL_2_ _URL_3_Whom is the object of the sentence and Who is the subject of the sentence. A trick I sometimes use is to replace the gender neutral pronoun with the gendered. "**To whom** did you give the book?" -- "I gave the book to **him**." "**Who** cut the cheese?" --... |
Why is it socially acceptable to make as much noise as possible while riding a motorcycle? | It's not generally acceptable, if a bike is loud it's because the owner made it that way. Some m/c groups like to think its a safety device, but in reality it's because they think it sounds cool. |
why do we forget very common words sometimes when we speak when we clearly know the word? | They may be the wrong words, [but the things themselves are all right. So who cares?]. Anyways, there are a few different theories as to why this happens -- it may be that some are right, or all or right, or only one is right, or even none are right. First, I like the Transmission Deficit model, which states that the s... |
[Physics] How do we know the speed of light is constant? | The speed of light is the speed light travels in a vacuum. So changing the medium doesn't invalidate the constant. |
How does a computer fully work from power on to the pixels on screen? | This is kinda a broad question and probably beyond the scope of a eli5 question, perhaps break down the question a bit more? |
The rubber pencil trick.... | i think this works the same way as if your playing a game and the frames per second drop before 24, st this speed you will notice that the images / video is no longer smooth flowing, i think the pencil works in the way, that if you can get the speed just right, it does this effect, |
How did the Last Supper become the subject of so much obession and analysis despite there being hundreds of other paintings about Christianity | Da Vinci's painting is beautiful, almost unearthly beautiful. He also captured the human emotions of the Apostles right at the moment Christ revealed that one of them would betray him. The chaos, the range of reactions, and Christ's own acceptance and serenity. It depicts one of the most important moments in Christiani... |
Why do streaming players buffer at different speeds even on the same internet connection? | A lot of variables can change the speed in which a player buffers—even on the same internet connection. Even though you may be on the same connection, the speed at which a web site is able to serve you content can be different, the file size can be different, and/or the code used to serve up the buffer is different . E... |
Can you please explain the whole "horse meat in meat" debacle? I've had horse meat and it was yummy. | To me, as a restaurant owner, the biggest issue is what else could have gone wrong. It's one thing for it to be horse. It's another thing if my supplier tells me it's inspected and regulated meat, and somehow, it was Z grade pet food, or chicken mixed in with my burgers cooked medium rare. If my supplier can't track wh... |
Why do birds bob their heads? | It has to do with how they focus on where they're walking. They see something, their head moves towards it, and then their body catches up.I remember hearing that for some birds like pigeons it has to do with depth perception. Not sure if that is true or not. |
Why are girls' pants pockets so small? | Because they are made to show off their curves. Not a bunch of bulges. That was the same reason they got purses.Yeah, it's pretty much because it's expected for women to carry purses, therefore they don't need pockets. We have vestigial pockets. |
What exactly is Google speech parser Parsey McParseface? | Parsey McParseface works by analyzing not just a paragraphs, sentences and words, but how they all relate to one another by segmenting the same sentence and paragraph into multiple ways in order to see how and why the words combine like they do to better understand the intent of the sentence. In a nutshell it allows th... |
Why do diseases/afflictions and the extent of their effects vary greatly from region to region | Their immune systems aren't adapted to both the environment, and are overall weaker. It's a common trait within western countries with improved sanitation and healthcare. All throughout their lives, their bodies have not been exposed to the same pathogens a native of the region would. It's also why allergies, immune sy... |
Pre WW2 why were the Japanese and Chinese such hated adversaries? | How far pre-WWII are you talking? From the Meiji Restoration onward Japan was on a major upswing in power while China was on a major downswing and this occurred in a time period where colonialism was all the rage. Japan saw a chance to replace China as the center Asia and went really hard in that direction. In medieval... |
How is Newt Gingrich a viable candidate after being forced to resign from his position as Speaker of the House? | He's always been a power player in American politics, and you could make a very reasonable argument that it increased since his resignation. His status as a viable candidate is due in part to the ineptitude of most of his competition - he can easily pull the experience card on every single one of the rest of the Republ... |
Why do people receive sexual gratification from non-sexual fetishes (e.g. crush videos) | The human psyche is a complex network of connections. As with all humans we are all stimulated by different things. While something like this is not considered 'normal' it is simply a fact of how some folks are wired. Long story short; Humans have many different triggers for many different things. It is simply how we a... |
Why are stray dogs often found in far worse condition than stray cats? | Cats can get anywhere. They can climb walls into bins, catch mice and have claws to protect themselves. Tgey also have had very little selective breeding so are still like their wild ancestors. Dogs on the other hand have had their instincts bread out of them. They rely on people and are restricted by walls and fences.... |
What went wrong during OJ Simpson's murder trial? Why wasn't he convicted? | Everyone remembers "if it doesn't fit, you must acquit" but few remember the whole summation of the evidence by the defense. Johnny described 20 facts which he told the jury could not be true if the prosecution's version of what happened was also true. He claimed to have found at least 50 but did not have the time to g... |
What is a knight, and what is a dame? Does anything come with this title in modern society besides, well, the title? | A Dame is just a lady Knight. A knighthood is a reward the King or Queen of the United Kingdom of Great Britain and Ireland can give to people who have done lots of good things for the nation. It is one of the highest honours in the UK. Other honours include OBEs and CBEs. If you were being made a Knight or a Dame, you... |
Why does the media never (or very rarely) report suicides? | Suicides are kept out of media because it has been shown that suicide rates tend to spike after highly publicized suicides. This is called the [Werther effect.]', "Like Zebra said, but also, there's not reason to show it. With murders and accidents they need to show that * A) There is a criminal and/or cause of people ... |
How does a turbine generate electricity? | Electricity is made up of a bunch of moving electrons . Because electrons have a charge, they feel the push and pull of magnetic fields. In a turbine, you have a bunch of magnets attached to a wheel and then around that you have a massive coil of stationary wire, wound thousands or even millions of times around the whe... |
Why has the US, instead of any European country, filed charges against FIFA? | This is answered in the megathread but basically the bribery happened inside the US and the money passed through US banks. |
Why are some smells universally accepted as good smelling, and some universally accepted as bad smelling? | Ah, so there's two theories to this: There are certain smells that are nearly universally considered bad, and they're usually associated with the really, really bad: poop, rotting/decaying things, spoiled food, etc. Some people speculate that certain smells are just hardwired into our brain as "DANGER, AVOID NOW" becau... |
How do magic eye puzzles work? | They're called autostereograms, and the [Wikipedia] article does a fantastic job explaining them.Quick link to [how they are made]and to [how the brain understands them]. Here's a tl;dr, but I 'd still suggest skimming through the article, even if only to look at the pictures. The images are made up of vertical strips ... |
The whole situation going on with Donald Trump and Mexico right now. | He suggested, iirc, that America should build a wall between the US and Mexico and shoot anyone who gets too close. The Mexican government is upset because that's fairly racist , and also kind of threatens their sovereignty . Univision, a Spanish language television channel that broadcasts in the US, has cut ties with ... |
Why can it be so hard to fall asleep at night, but come morning, so difficult to wake up and start one's day? | Only partial speculation on my part, but I suffer from an acute sleep phase disorder, so I know the issue very well. Ultimately, it probably has to do with melatonin levels. It's the chemical that makes you feel sleepy. If you don't have enough of it, you're not sleepy . Once your melatonin levels get high enough and y... |
Why is "the floor is lava" so omnipresent amongst children? | all kids play. all kids have floors. Running around on the floor gets boring after a while so you need to get more creative. Then you have to come up with rules and motivation. There is something called multiple discovery theory that basically says that the same thing can be invented by many without any connection base... |
Why we cant tell the subconscious mind what to do? | You're brain does a whole lot of things, too many for you to think about. If you had to think about breathing, sometimes you might forget and die. The subconscious is a little more complicated because it involves feelings as well, not just how to make your stomach digest food. Emotions are very complicated and often ca... |
Why do some places of business lock one side of their double doors? | The doors they use have two locks, one with a key and the other a much cheaper frame lock with pins at the top and bottom. You can't open the second kind without opening the first door with the key. But people in retail are lazy. They don't open the second lock even though it is required by the fire code. Also the loca... |
Why do objects fly more accurately when thrown with rotation? | There are **two** things at play here, and everyone always ignores the second one. The first is simple gyroscopic stability, which is a little bit of witchcraft that works in our universe because it works. It's hard to explain the stabilizing effect that spinning has, but it all comes down to angular momentum. In short... |
why I get tired of eating same foods but not tired of same drinks? | People on liquid diets eventually get tired of the same drink, so this question is flawed. But if you're not on a liquid diet, mostly likely you're not drinking a drink often enough or in large enough quantities to get tired of it. |
How do doctors figure out if babies need glasses and if they do how do they find their prescription without the regular test they usually give, | Dude this question is asked way to often. Just search it on here and you'll find the answer |
Why can't normal transition lenses change their shade when inside a car? | I've been told before that it's because car windows tend to block UV light which is what makes the lenses darken |
Why excercise or stress in our muscles make them grow and strengthen? | As you use your muscles more and more, you notice that you feel an aching right? This is caused by the hundreds of micro-tears that have formed in your muscles. When these tears are repaired, your body wants to ensure these tears do not happen again, so it builds the muscle back better than before. Doing this continuou... |
What exactly is a fuel injected engine and how does it differ from other engines? | Fuel injection is the introduction of fuel in an internal combustion engine, most commonly automotive engines, by the means of an injector. All diesel engines use fuel injection by design. Gas engines can use gasoline direct injection, where the fuel is directly delivered into the combustion chamber, or indirect inject... |
Can humans safely eat raw meat? | The meat we buy from stores isn't fresh. Bacteria has had time to grow in it, which is why eating raw meat is dangerous. If you ate freshly killed meat, the biggest danger would be parasites. [Past ELI5 questions with more info] |
Why can the developers and programmers of the world's best chess supercomputers such as Deep Blue not be chess masters as well? | They dont encode much actually related to chess from what I understand. They code a learning mechanism and have it play games and lose until it learns the best possible outcomes of any pieces positioning on the board.The developers don't actually learn how to play chess well. They teach the program how to evaluate how ... |
why people like and dislike each Republican nominee. | **Romney's pros**: Mature, smart, accomplished. He debates well. He has an extremely strong business background, and a strong governor background. He has frequently been mentioned by folks in the media as the only candidate that appears presidential . He adapts quickly. **Cons:** He's wooden. Very reserved. More modera... |
Why do we say "persons" when talking legally/financially but "people" everywhere else? | You use persons when you want to emphasize that each individual has certain rights and responsibilities. People is used as reference to the whole group with less emphasis on the individuals that make up the group. |
EVE Online and why so much money was destroyed | EVE Online is a mmorpg that has an in-game currency that has a transfer rate to real cash. When anything that you bought with real cash is destroyed or used in game-you're technically destroying and/or using real money. For example, the currents exchange rate is: 1 USD = 32,681,651.13 ISK According to _URL_0_I've heard... |
Why does putting cold water in a hot glass make it shatter? | Those two things aren't really similar. Glass has two very important properties that cause this particular phenomenon: it is a poor heat conductor and it is very brittle. When cold water goes into a hot glass, it cools the inside of the glass which makes it shrink. Since glass is such a poor conductor, the inside ends ... |
-Why do medical professionals wear their scrubs outside of work? | They are work clothes. I'm sure they probably have different ones they wear when they need to be in a sterile environment. Do you wait until you get to work to put on your work clothes? |
How can I be sitting in a chair and have full bars on my phone and 3G service then the next minute have only 1 or 2 bars without me moving? | it's not only on 3G but can also be found on 2G due to multipath fading ,which is simply saying that your phone receives signal from many path that have bounced from many objects like windows, cars, walls. If the object that the signal bounce from moves , this may affect the total signal strength that reaches your phon... |
how were programing languages created? | Once you have a programmable computer with a keyboard and a console, the next bit is easy. With your programmable computer, you write something which reads from the keyboard, matches keywords, then outputs programmable-computer-instructions. Now you have the beginnings of a language, add keywords for reading from the k... |
Why is the suicide rate in the Army so much higher than the suicide rate in the other military branches? | This is my guess - a far higher proportion of the Army experience horror and gore up close. You know, going through the aftermath of kids being shot and blown up, dead bodies, getting ambushed, etc. I understand the Navy and the Air Force do have ground units, but from what I understand this is only a small proportion ... |
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