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How does a device communicate with another device behind a router? | The process is called NAT, for Network Address Translation. NAT is a way to map an entire network to a single IP address. NAT is necessary when the number of IP addresses assigned to you by your Internet Service Provider is less than the total number of computers that you wish to provide Internet access for. As traffic... |
Why are players from South Korea so dominant in video games? | There are many reasons: - the country is small but densely populated. Servers placed in Seoul can often provide players with pings < 10ms - essentially the same as in a LAN. For MOBAs this means that pro players get to practice EVERY DAY in the very environment they will play on stage in tournaments. At this level of p... |
Why does pressing "=" twice on a calculator perform the last operation twice? | Because you might want to know all the ones in between, such as 37, 74, 111, 148, not just 37*4 = 148. If you want to know what the monthly totals are going to be, not just what you'll have at year end. It also helps to get values for tables and can be used to construct graphs with predictable zeros and the like. |
Why are red states, states where the majority of the population advocate a smaller federal government, more dependent on federal funding? | Because they're rural; farm subsidies are a big source of federal income for said states, and rural states are more spread out, which obviously makes everything more inefficient. This is basically proven by states like Vermont and Maine and Texas and Georgia . The two exceptions I can think of offhand are Nebraska and ... |
If weight gain/loss is just a matter of calories in and out, why is it so hard to keep weight off? | When you lose weight, the amount of energy your body needs also decreases, as you have a smaller body. A person weighing 300lb/150kg needs more energy to maintain basic body functions than a person weighing 150lb/75kg. So you have to adjust your basic caloric intake to your smaller energy need.When you change your diet... |
How did caterpillars evolve the process of metamorphosing into butterflies? | The opposite happened. Insects used to hatch from eggs in their adult form , and later evolved the larval stage. When developing in the egg, the insect goes through the larval stage - the evolutionary step was hatching at this point instead of staying in the egg throughout the development process. The driving factor is... |
how computers can produce such rich variety of output through only "on"/"off" ? | Because it's not "only" on/off. It's **billions** of different on/off states , and they're all changing **billions** of times a second. It's kind of similar to how we can produce such a rich variety of images with just red, blue, and green. A single pixel is just one color, but **billions** of pixels can form almost an... |
Why do we grunt/scream when doing strenuous exercise? | Everybody uses their tummy muscles. But sometimes, when you squeeze really hard while you poop, you squeeze some air out! Same thing if you are lifting heavy ass weights. You're squeezing air out. Even though you are A. Trying to keep it in or B. Go for an extra bit of power by forcing all the air out and really *reall... |
How do 'off the menu' items work at restaurants? Are they created to build exclusivity? | Off menu items are generally 1) Thing made from components of other menu items. 2) Delivery mistakes that either send the wrong item, or send too much of an item. 3) An experiment that they are testing to see if it should be on the menu.I worked at a place where the chef was also the general manager. Sometimes he would... |
Why don't Americans incinerate more of our garbage? Wouldn't it create energy and eliminate waste? | There are a lot of Americans who incinerate garbage, especially in rural areas. It doesn't happen in populated areas, because it pollutes the air. Incineration doesn't magically destroy crap, it turns crap into airborne crap. When you're one family living on six acres, you can incinerate and be fine. When you have half... |
What is the reasoning behind giving a prisoner multiple life sentences when you could just give them one without the posibility of parole? | Search for [multiple life sentences] and you'll find about 13 threads answering the same question. ----------------- A brief explanation: 1 It punishes the criminal for each criminal act that he or she committed. 1.5 Each victim gets justice. 2 Charging someone with multiple crimes means that even if they're found inno... |
Why are we able to see heat distorting an image?. | One thing we 've learned about light, is that it travels differently through different kinds of materials. This is why, for example, you get that famous [pen in a glass of water] effect: the light travels differently in the water, so it makes it look like the pen is in a slightly different place, compared to the part o... |
Why is it that somebody with ADHD or another similar disorder is much more likely to be incredibly good at certain things. Such as music or art? | I think creativity means doing something really new, so that it's only the unusual brain which can truly very creative. I think the most commonly disorder linked to creativity is bipolar disorder, though, not ADHD. |
why do phone batteries last longer in the cold, but suffer no battery loss in heat? | If batteries last longer cold then wouldn't then suffer batter loss while hot by definition? I mean if the batter lasts X minutes cold then it would last something less than X while warm. That is battery loss |
What happens in our brain, when we forget what we wanted to do while starting to do the action? | Our brain reinforces pathways we take more than once. Often what happens when we forget what we wanted to do while starting to do something is that a more reinforced brain pathway is triggered when we start the action, causing us to forget the rest once it leaves short term memory. Sort of like the challenge of patting... |
If you live where there is a plentiful and constantly-replenished source of fresh water, why is it a bad thing to use as much water as you like? | It's not too bad. Even if there is plentiful water, it takes energy to purify, pump, etc. So if you are "wasting" water, you are wasting a little bit of energy too. So you are probably contributing in a very small way to global climate change. It has no bearing on areas that are in a drought, unless they are close enou... |
What would happen if global warming was reversed, and the Earth was dropping in temperature? | Uh, what is the opposite of hot? Go watch the kids movie Ice Age There's your ELI5 |
Why are birds and bees associated with talking to kids about sex? | Usually the first thing you learn about procreation is that of plants . The German expression is, appropriately, “Bienen und Blümchen”, which translates to “bees and flowers”. There are male and female plants, and the pollen is the equivalent to sperm, while the blossom is the equivalent to the female parts, leading th... |
How did different countries determine which side of the road they drove on. | Arbitrarily mostly. Napoleon had a lot to do with right hand driving. He conquered so much of Europe and he preferred traffic on the right side so most of Europe, and areas influenced by that just stuck with it when cars came along. He never conquered Britain so as a result the English and it's empire such as India and... |
How much of the "Iceberg" Deep Web diagram is true? | It's complete bullshit. Yes, those sites are real, but they make up a tiny fraction of the internet. Most of the data on the internet *is* "deep Web," but all that means is that you can't find it on Google. People's files, stuff that is behind a username/password , private sites for businesses and schools and such stuf... |
Why can't we draw what we picture in our minds? | If someone gave you a pencil and asked you to sketch their face, you could probably get the outline, and some of the facial features somewhat okay, but doing shading or using darker/lighter and broader/skinnier lines, or using blank space to simulate highlights is more advanced and not something a regular person would ... |
Why do you sign the back of credit cards? Aren't you showing a thief how to forge it? | The thief can also order a new card in your name and swipe away. The signature on the back proves that you ordered and authorized the cardThe idea is that when you receive the card, you sign it with your signature. When you make a payment, you repeat that signature and the seller compares the two signatures and goes "y... |
Why do our hands and feet get wrinkly after being exposed to water for a long time? | For a long time we thought, that **taking in water into the lower regions of the skin causes a swelling**. **This is wrong** It actually is an **autonomous nervous reaction** of our body to a wet enviroment.Certain **blood vessels under the skin** in our hands and feet **constrict** and cause the skin above them to wri... |
Why/How do some medications cause such extreme weight loss? (Chemically) | It depends on the medication. Typically, most medications cause a loss of appetite, but other medications work thermogenically. They speed up metabolism by causing you to build up slightly more heat, so you're literally burning calories. These are usually illegal, since, if abused, they can cause death. An example of a... |
When people are cremated and their families receive an urn full of their ashes, how much of that ash is actually the dead person and how much is other stuff like the coffin etc? | It's hard to give a percentage because it varies greatly depending on the type of cremation container that is used. i.e., a standard alternative cremation container will yield much less ash than a hardwood cremation casket. After a body is cremated, you are essentially left with brittle skeletal remains that are then p... |
Why do mountains become lighter in shade the farther away they are? | My guess is from the haze in the sky overlaying the mountain tops. The further away, the more air for the haze to occupy.atmospheric perspective .. particulate in the air blocks the full intensity of the view. the further away you look, the more atmosphere you're looking through, the paler the view will appear. |
what actually makes things slippery? Like slime etc? | It can form a thin film between the two objects so they never actually physically touch. Engine oil does this for example, in rotating parts, the two bits of metal don't touch but ride on a very thin film of oil between them.Something odd though, is that scientists can't fully agree on why ice is slippy. |
Why do we only have 1 spleen if we are bilaterally symmetrical? | We are bilaterally symmetrical on the outside because it facilitates locomotion. I did my undergrad thesis on this and can share my paper if you are interested, or you can get the basic argument from this paper. _URL_0_ |
Why does drinking alcohol during pregnancy possibly cause birth defects? | Alcohol isn’t per definition bad for you, the problem is that it is transformed by your liver to a toxic molecule called Acetaldehyde. That’s also one of the many reasons that causes the hangover. That molecule’s toxicity is bad for the child. The child shares the same blood with his mother. The toxic compound is in th... |
Why do singers sound in tune when played at high volumes through a phone speaker or with headphones but out of tune when played at a low volume through phone speakers? | I'm a bit of an audiophile. What you are describing is frequency response. I 'd have to get a bit into music theory to describe that. When you're hearing a pitch like say High "C" from an analog instrument like a human voice, you're actually hearing several pitches that come together to make the pitch you hear as domin... |
Why has Australia had 3 different prime ministers in the past four months? | The Labor Party won the election in 2007, their leader at the time was Kevin Rudd and so he became Prime Minister. In 2010, following disatisfaction within the party, there was a leadership election which Julia Gillard won. Rudd therefore stood down as PM and Gillard became Prime Minister. Two months later the federal ... |
Why can't cyber criminals hack the bank's systems? | Because the reward isn't worth the effort and the risk. Even if you had access, you couldn't just add 10,000 to your account and then go to the ATM and cash out. They would know who you are and arrest you. Bank systems are very secure. Even once hacked, the accounts are hard tied to transactional data. It doesn't just ... |
If the stars and planets are light-years away, are we seeing the planets that many years back? | Yes. Everything we see in the sky is from the light it generated/reflected in the past. Even the sun is several light minutes away, so we are always seeing it as it was a few minutes ago. A star 10 light years away, we will see the light that is now 10 years old. The further an object is away, the further in the past o... |
What exactly is your role as a lawyer when you're representing someone like Saipov (who quite clearly deliberately killed a pile of people and is pleased with himself for doing so)? | The lawyer's mandate here is to ensure that the government doesn't break its own rules -- for example, introducing evidence obtained illegally, or accusing the person of the wrong crime, or failing to take into account mental illness, or not holding a fair trial. |
The current situation between Syria and Israel | The "current" sitation simplified, Short version : Isis and Alqueda Millitants from iraq took over the arab spring free syrian army attemt to remove assad from power, Israel at first supported the free syrian army, but now its basicly meaningless and powerless as ISIS has taken over most of the anti assad forces. Now S... |
Why is having an overbite a problem? | My understanding is that a person with a pronounced overbite will have issues with teeth growing incorrectly and or accelerated wear i.e. grinding', "Not an overbite here, but an underbite. I was set to have corrective surgery, but didn't for reasons. The surgeon explained that if I didn't have my bite fixed, later in ... |
Why does my legs or feet fall asleep every time I'm in the bathroom with the same position for a long period of time? How can I prevent this? | 1. Add fiber to your diet. Seriously. 2. Move your legs some. You are cutting off circulation to your extremities. Without blood the tissue doesn't get oxygen. Move.The toilet bowl rim can put pressure on your sciatic nerve, which runs underneath your pelvic bone in the buttocks region. This nerve supplies almost the e... |
How do terrorist groups like ISIS convince young girls in western countries that life is better in Iraq/Syria? | Generally, they have luck with any group because of outsider politics. Plenty of people feel marginalized and useless in Western society. Groups like ISIS preach a very well-defined set of social rules, in which these marginalized people imagine their life can matter. While objectively, people seem to be giving up a wi... |
Why do small paper cuts sting more than larger ones? | when you cut your skin nerve endings are exposed and your body interprets the sensation of the nerve-endings being exposed to air as "pain" - with a slightly deeper cut, you'll bleed and the blood will serve as a buffer between the air and the nerve-ending. source: a guy with no medical backgroundI saw a TIL about this... |
How come 90% of Windows' problems can be solved by restarting? | 90% of computer problems are caused by the user, not the computer. If you accuse a user of missing out step 1 of a three step process they will invariably swear blind that they didn't. When you reset a computer you also reset the user, in that they have to start from the beginning. Also, don't ask someone if something ... |
How were the first operating systems/programms made if they didn't have any programms to code them on? | The *first* ones were hardcoded by wiring a circuit together that did specifically what you needed it to do, and no more. Imagine you have two light switches controlling a single light. How does a switch know that sometimes flipping it up turns on the light, but if the light is already on, then flipping it up turns off... |
why do computers use a RGB system for colors but the real world art uses CMY/RYB color systems | in a computer, colors are mixed by adding light of different wavelenghts. in the real world, they're mixed by adding paints/pigments which absorb diffrent wavelengths, so it's actually "subtracting" |
What is universal basic income and what are the prons/cons? | The idea is to give every adult a monthly income of X amount of money, typically in the form of a check from the state or federal government. The amount that everyone gets is equal, and doesn't hinge on annual income or net worth. Most propositions that I've seen set the income at $1000 a month. With approximately 242 ... |
Why do the backseat windows in so many cars only go down 3/4 of the way? | Look at the door and its placement in regards to the rear wheels. Many times, there just isn't enough room for the window to roll down all the way. It can also be a safety feature to reduce the likelihood of a child climbing out of the car.Depends on the car. The window usually ends where the fender starts and it might... |
Why don't cats meow at each other? | It is not actually a natural behavior in cats past their infancy. It is the cat equivalent of a baby crying, and it also happens to be similar/imitate the sound of a human baby crying. We are biologically wired to respond to a human infant crying, and since a cats meow is similar it triggers that same response in most ... |
What is the draw to Scientology? | You should try viewing the recent documentary: "Going Clear: Scientology and the Prison of Belief." In it, they describe a process by which people are promised the solution to their anxieties and personal flaws BUT they must donate more and more money to the church in order to progress along and access the deeper myste... |
Where does the money for the local police force come from (in the US)? | State, county and local taxes along with some federal funds pay for the various police departments serving at a village, county and state level. The department is there to protect and enforce but does not have a social service role per se. Some have social workers who will help a person connect with social service agen... |
How does a chicken go from egg to my supermarket shelf for less than $5? | Google 'economics of scale'. Basically the more you make of something, the cheaper it becomes. There's also a great youtube vid of a guy making an egg sandwich frim scratch and it costs like $600 or something. |
What are the students in Quebec rallying against? What anti-austerity measures are they trying to fight? | They are fighting against the political ideology that austerity is, which englobes way much more than only tuition fees. In 2012 , there was a precise goal, it is harder to define one now which may be why many people don't understand that students are fighting for themsleves, but also our whole society. In 2015, to und... |
Does the size of your brain affect memory, emotions? Etc. Or does it just make you more smart ;) ? | Size doesn't matter. What matters is the number of neural connections. Your brain is made up of brain cells. The size of the cells and the number of cells doesn't really matter very much. What matters is how many connections there are between the cells. The more connections there are, the "smarter" the brain is. |
Why do we have to put dogs or cats down? | Dogs and cats are put down to end their suffering. It is considered humane rather than allowing them to suffer to the natural end. It also gives a bit of closure. The reason you don't see it done with humans is because there's laws against it. For two reasons. One, someone might fake another's suicide, when it was real... |
What's happening inside your brain/body when you get that feeling where your 'heart drops'? | That's a great question!! So basically, whenever your heart drops, it is usually because you're excited, afraid, or suddenly aroused. The **amydgala** is a part of the brain that is responsible for releasing adrenaline to allow you to feel excited, fearful, or aroused. The amydgala is also connected very closely with t... |
How do CEO and high ranking people work for $0 pay or $1 with minimum wage laws? | Wage laws are for hourly workers, salaried workers are exempt**ELI5:** Some people who run the country in Washington, DC have rules describing what is considered "fair play" between businesses and employees. People that own businesses do not have to follow these rules when paying themselves. **A less-ELI5 answer:** Fed... |
What happens if you jump in water, while covered in a hydrophobic material? | Nothing special. The only difference would be that you wouldn't be wet when you leave the water, since the water molecules cannot stick to your hydrophobic surface. While you are in the water, you really wouldn't detect any major differences, aside from decreased friction I guess. |
How does arsenic cause cancer? | It is chemically similar to Nitrogen, which is very important in protiens and DNA, but doesn't react *exactly* like nitrogen, and throws off all the connected chains of reactions involved in cellular division. |
Is actually possible to lucid dream? If so what is going on in the body when somebody is lucid dreaming? | I can't tell you what goes on in the body while lucid dreaming, but I have reached it before. It took a few weeks of focusing on it outside of my sleep, then in a dream I thought, "Hmm, this might be a dream." So i walked u[ to the wall in my house and noticed it was different and the texture was not solid. Realized I ... |
The IRA and the Irish Troubles. | Imagine you have an island . Now someone near by comes in and attacks you, takes some of your island, and there are big cultural differences between your people. Fast forward a couple hundred years, the people who took over some of your island still have a bit, and the people who moved to that bit have lived their so l... |
what is that feeling when someone is watching you. | You didn't. You just tend not to remember the million other times you thought somebody was watching you and you were wrong, because why would you particularly note something like that? What stands out is when you're right that somebody is watching you. This is a classic example of confirmation bias. |
Why have major countries not taken to teaching Esperanto in classrooms to allow people to communicate internationally? | Because English largely fills this role, albeit incompletely. In general it's far more practical to get everyone to speak a language that at least some people already speak. It's at least incrementally harder to get people to speak a language that essentially _no one_ speaks. As for why we aren't "all in" on this, it's... |
Why if I have both my earbuds in at a rather loud volume it's 'fine' but if I take one out and leave one in it's unbearably loud? | The brain controls how we hear the world around us. If a sound is too loud, the brain can attenuate it . If a sound is too soft, the brain can amplify it . So when you plug both ears with high volume sound sources, the brain actually attenuates those sounds . Once the brain starts picking up a lower sound signal in one... |
Why do I lose my hearing when I yawn? | The reply above is mostly nonsense. When you yawn, a reflex that often accompanies is the flexing of the tensor tympani muscle. This tightens the tympanic membrane and as a result dampens sound/vibrations being conducted through the mechanical parts of your ear. This creates the muffled and quietened sound that you mig... |
If I weigh 99 pounds and I eat 1 pound of nachos will I be 1% nachos or not? | No. When you think of the inside of your stomach, you need to remember it's technically the outside of your body. If you were to stretch a person out from the mouth and anus, they would be the same shape as a donut. So the food in your stomach isn't part of you yet, it's basically the same as holding the nachos in your... |
How did the negative connotations of drivers of certain car brands begin? | I think it goes off of two things:1. Target demographic2. Popularity For example: Here in Australia, Both the Ford Falcon and the Holden Commodore are known as ' Bogan ' cars.Particularity older models as they are some of Australias most popular cars and as with their popularity, they are incredibly cheap to buy second... |
Why do we use greenscreens? Why not redscreens or bluescreens? | Blue is often used as well. They use colors that are often not going to be worn by actors or used in props so you don't get holes through to your projected background. So green Lantern gets a blue screen and superman gets a green screen |
Since cellphones are here to stay and commercial flight is here to stay, why haven't they figured out how to make it so we can keep our phones on. | You *can* have them on. You can't use them as a phone. _URL_0_ One, cell towers aren't designed for phones 30,000 feet in the air that can hit multiple towers. Two, on a long flight having people babbling on phones would cause some passengers to politely invite others to step outside.They have. I recently heard in Amer... |
When fasting to promote Autophagy; how does the body know that they should go for the damaged and senescent cells first instead of healthy cells? | Healthy human cells have a protein called MHC 1 on their outer surface. When they are damaged, they tend to lose this protein. Your immune system uses natural killer cells to destroy this type of cell, and activates when your body needs to reclaim materials. Ntcs are active always, but increase activity when called. Th... |
The differences between salts used in food/cooking. | Table salt is a small crystal salt that contains an iodine additive for your health, because its something we don't get easily from other places. Kosher salt contains no iodine, and has larger crystals. They taste almost the same except for a slight iodine taste. You can use them interchangeably, except in baking where... |
What's the point of a silent letter? | These usually come up because pronunciation changes faster than spelling. Furthermore, it's possible for a language to adopt the spelling of a word from one parent language, but the pronunciation from another - this is the case with the word "colonel," which came up recently here on reddit. So, the point of silent lett... |
The relationship between passing laws and court rulings | They could, but the general way it gets resolved is to move the question to a higher court. In the US, the legislative, judicial, and executive branches have equal power, but different roles. The Constitution is supposed to be the ultimate authority. Laws passed by the legislative branches must not contradict the Const... |
Origin of modern ghetto culture. | Culture's an ever-flowing thing, there aren't really start points. It's like a series of streams shaped by events that merge with other streams, flow into dry riverbeds carved out by extinct streams, or divide and form two "new" streams. There's no sea that they flow out to, just a giant MC Escher loop of streams, endl... |
How could self-confessed heroin addict Philip Seymour Hoffman get away using illegal drugs without getting arrested? Same with other celebrities who obviously use drugs? | Simply saying you do something isn't prove you do. I can say I'm Jeasus but that dosn't mean I am. So without prove it's hearsay or speculation and our legal system needs evidence, witneses, intent to harm etc. |
The concepts of "proof" and "theorem" in mathematics. | Theorems are usually important results which show how to make concepts solve problems or give major insights into the workings of the subject. They often have involved and deep proofs. Propositions give smaller results, often relating different definitions to each other or giving alternate forms of the definition. Proo... |
. Why can't we create a wireless network using our existing mobile phones as the transmitters? | You could. It's called a "mesh network". If I remember correctly, it was done in some places during the Arab spring to get around government clampdown of networks.There are a couple of issues with this. Mostly, it's because you would lose half of the available bandwidth on retransmission unless you were using two wirel... |
Why does a large portion of Africa seem to be so corrupt, and underdeveloped compared to the rest of the world despite continued globalization and humanitarian effort? | I am hardly a specialist on the subject, but IMO it's because of most countries helping Africa are busy pouring money into the country, without putting enough personnel to teach the local population the proper ways and procedures. For example, take a project to build a hospital. Even without taking corruption into acco... |
Why are there so many conflicting views on taking large amounts of fat soluble vitamins? | To be hones I am not aware of any "conflicting" views on this topic. Large amounts of soluble vitamins ARE unhealthy, as they lead to overdose. In medical terms this is called "hypervitaminosis".Overdosing on fat soluble vitamins is possible, because your body naturally stores fat and therefore it stores those vitamins... |
In what ways can diversity training be counterproductive? | The reason 'diversity training' exists is liability. No matter how 'diverse' your corporation is, you're going to get sued at some point. It's merely a fact of life that if you're sitting on a pile of money, people send their lawyers after that money. When the corporation goes to fight those inevitable lawsuits, the ar... |
Why are the number of Jews in the world so low compared to other monotheist religions? | Muslims and Christians both launched huge campaigns to spread their religion. Gathering new followers is one of the many aspects of their religions. Judaism actually makes it hard to join their religion. Seriously. Go to a Synagog and tell the Rabbi you want to convert. It's not easy. |
Why does Universal Studios have Marvel character rides? | Marvel made tons of deals to monetize and sell off rights of their characters before Disney bought Marvel. All of the deals still stand until they expire, regardless of who owns Marvel now. Disney bought Marvel with those contracts in place and they don't just get overturned because of an ownership change. For example,... |
how and why did neo nazi / white nationalist mentality get to become so mainstream? | Neo-Nazism and White nationalism are NOT mainstream by any means. It is simply not true that more and more people are getting whipped into a frenzy over the existence of racial or sexual minorities. The racists and sexists were racist and sexist long before Donald Trump and will continue to be racist and sexist long af... |
Why can't we digest corn? | You can digest corn, specifically the juicy part that is inside the yellow husk. As /u/kw3lyk says, there is a high concentration of soluble fiber, which means the yellow husk fills with fecal matter making it appear as though nothing has happened to it. So basically, by the time it comes out of your body the inside ha... |
Is animal "intelligence" comparable to that of a humans? | Not really, no. Firstly, only some animal species have neuronal axons which are myelinated. Myelination helps improve the speed at which action potentials can propagate across the axon to, for instance, trigger action potentials in other connected neurons. Without myelination the brain would be far too slow and ineffic... |
How do plants go extinct? | Plants are actually susceptible to many of the same issues animals are. For example, Venus fly traps are only native to a very small area of North Carolina and if that region became a large metropolis like New York City it could easily become extinct. Some plants rely on animals to spread their seeds, and so things tha... |
Can you use an apostrophe s with someone's name to make it a contraction? | That's absolutely fine - you take whether it's intended to be possessive or not from the context - if the thing that follows it is an action , then nobody would ever think that Jim is in possession of sleeping, so it wouldn't be likely to cause confusion. |
what are real silencers for? | The biggest reason is to lessen the likelihood of hearing damage. Most handguns exceed the 140db sound level that means even momentary exposure causes hearing damage. Suppressors generally bring them below that levelIf you lived next door to an out door gun range you would be pleased if everyone started to use them all... |
Why are the majority of rocket launches performed close to sea level? | Several reasons. You don't want to launch over populated areas .so near ocean sea level! You want to be closer to the equator if possible Southern areas of Northern hemisphere continents have a lot of oceans. You want a large flat area so you don't have to move heavy things up or down .more common at sea level than in ... |
What is Repo Rate ? | TL;DR: it can be thought of as the interest rate paid on a type of loan or deposit used by banks and large financial organizations Longer explanation In order to understand what a Repo Rate is, first you must learn what a Repo is. Repo is short for Repurchase Agreement, a transaction where one party sells securities to... |
Why do jets leave white trails in the sky and why do conspiracy theorists go crazy over this? | There is water vapour in the air, when it goes through a jet engine it gets compressed and turned into mist - a contrail. Because the air is not at the same pressure as the engine, this effect is temporary and the contrail dissapates after a few minutes. Occasionaly when the air pressure and moisture content are just r... |
How submarine missiles launched underwater "never actually touch" water. | The missiles are ejected from their tubes by gas pressure created by a "gas generator", a solid-fuel rocket motor attached to the bottom of the missile tube which heats a pool of water creating steam. After the missile leaves the tube and rises through the water over the submarine, the first stage motor ignites, the ae... |
Why do all smartphones (at least in the EU) have a common micro-USB charger but iPhones don't comply with this? | The other end of the iPhone's cable plugs into any USB port or USB charger, so this is a non-issue. |
How does producers prevent their barcodes from overlapping with every single other barcode? | There is actually a non-profit organization, GS1, which maintains the UPC listings for every product. Initially, when barcodes were first being developed, manufacturers and retailers put together a number of standards, and over time, the regulatory groups evolved into the organization we have today. If I have a new pro... |
Why do people in different parts of the world have different accents? | I assume you mean when speaking the same language, say English. One of the main reasons is that whatever their native language is probably has a different phonemic inventory to English, which is to say their language is made up of different sounds than in English, although there might a overlap. When this happens peopl... |
Why does your hand look choppy when it's moving quickly under certain lights? Why do car lights sometimes flicker when recorded? | The "certain lights" and car lights aren't producing continuous light. They're strobing, but the strobe is too fast for you to see. If an object moves very quickly under a strobe, you'll start to notice the effect because each strobe is providing considerably different information to the brain than the previous strobe.... |
Why do foreign objects (ie a stray eyelash) feel 100 x bigger when it is in your eye? | Eyes and tongue are highly delicate and specialized organs. Humans heavily rely on sight and taste for their awarenes and survival. These organs must be priority number one. So any object that happens to be in the eye or in the mouth is deliberately exagarated and the sensation is uncomfortable because one must remove ... |
A lot of gasoline producers claim that their gas is somehow better than that of other companies; is this ever a legitimate claim? | High quality gas has detergents in it that can improve performance and engine lifespan. Low quality gas has poorer quality control and can lead to poor performance. Whether advertiser's claims match up to these, that's anyone's guess. But it is not impossible for one brand of gasoline to be better than another. |
Why can we move all of our fingers independently of each other minus our ring finger? | It's all about training. Your brain takes as many shortcuts as possible when it's learning how to move all of your limbs and is happy to lose ability if you don't use it. This is why physical therapy is so important after an accident or surgery: your brain can develop shortcuts that make things easier in the short run,... |
How did the first computer programmes know what one second is, or any unit of time for that matter when mankind invented the units of time? | Well mankind invented computers too, so of course we built them to use the units of time we invented. Computers generally keep time with a quartz crystal. When current is applied to them they oscillate at a predicable frequency. By counting the oscillations the computer can work out if a second has passedIn the *very* ... |
how skin tags are formed and how can they be prevented | The one I had wasn’t at all that large. Didn’t bleed when it came off, just sort of fell off in my hand one day with a little spot under neath that didn’t require a bandaid or anything. Moles are a different story. That should be looked at by a dermatologist and will probably require a stitch or two if they remove it. ... |
If I collect and recycle my own pee and sweat, will I be able to keep myself hydrated indefinitely? | This doesn't take into consideration evaporation. Also, sodium you're taking in through your food is coming out in your urine , so unless you 've stopped eating and you're in an environment below the dew point, you will become more dehydrated over time ', "This is essentially what happens in the ISS Assuming you could ... |
why do flies and bees etc wings sound so loud when they fly? | Your ears are vibration sensors; sound is the air vibrating. Insects have to flap their wings hundreds of times per second to stay in the air. The flapping motion of their wings causes the air to vibrate back and forth hundreds of times per second also, which your ears then detect and call a buzz. |
Why did the US spy on Germany if they are one of our closest allies? | This is simple, do you trust everything your own politicians are saying? Then why should foreign governments? Even allies. The primary job of the intelligence community is to get to the bottom of what countries actual intentions are and how that affects their countries interests. This is true whether it's the US, UK, C... |
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