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How do submarines communicate with anyone above ground? | They use ELF to give them messages, it's very slow and requires very large transmitters , it's about 1MW transmit power. It's very covert because the sub never transmits on it and they can get simple orders like attack bob. If they need something complicated they go to periscope depth and use a mast with a bunch of ant... |
Why can most super cars barely break 200 mph yet land speed records back in the 1930s are over 300 mph? | because cars designed to break land speed records are purpose built for doing just that and only that i.e. go down the bonneville salt flats in a straight line. Supercars today are designed to go around tracks, keep the driver air conditioned, alive in the event of a crash, conserve fuel and be driven on regular street... |
How did O.J. Simpson get acquitted of the criminal trial but lose the civil case? | Criminal trial has a higher legal burden of proof. You have to be **guilty beyond reasonable doubt** to be found guilty in a criminal trial. To lose a civil case you simply need to have the **preponderanc of evidence** be against you. Basically, this means to be guilty in a criminal trial there has to be no doubt, to l... |
If all humans disappeared tomorrow, how long would it take before all evidence of the human race disappeared from the surface of the earth? | ASAP Science actually covered this if you want to check out their channel. I believe the video is titled, "What if humans disappeared?" |
Why MMORPG games are so popular? | You might look into any other genre and find that it has a massive amount of player base as well, but MMOs have big populations for several reasons. 1. They can cater to both casual and hardcore players. You can play with friends at your leisure not worrying about your build doing easy content, or you can become a perf... |
What keeps the actions of the President of the USA in check? | This is a pretty good question, considering. I'll give it my best. The president, as head of the executive branch, is given broad authority to execute the laws passed by congress. Congress can't be expected to pass a law, for example, to quickly prevent travel to a country based on an outbreak of a disease. Thus, a law... |
why are so many tests and other metrics not done "out of 100?" (ie, SAT are out of 800 or 2400) | The reason they do it for the SATs is because it allows for minor corrections in the scaling. The difference between getting a 2100 and a 2400 on the SAT is 2 percentiles but its 300 "points". It allows for a bigger gap to be shown even as the percentile difference from score-to-score becomes smaller and smaller at opp... |
How come bag pipe playing Scotsmen manage to get into every parade that occurs on the planet | Er that might be a slight exaggeration. But there's a couple reasons why they're often seen in widespread geographies. First, they're a highly recognizable visual and audible spectacle. The kilt, the sporran , the plaids, the hat and the bagpipe itself all lend a "wow that guy is either amazingly cool and self confiden... |
why does flicking the top of a shaken up pop can stop it from spraying everywhere? | flicking the top or side of the can causes some of the nucleation sites that have built up gas bubbles to release before you open the can. This causes a gas pocket to form at the top of the can and reduces the potential for the soda to spew out violently as the gas has already moved. When it does spew that is due to th... |
Why does our mind seem to work against itself in cases such as anxiety and depression? | One theory is that these simply represent a defect, something that's a bit broken. Another theory is that the human brain is not good at coping with the conditions of modern civilized life. Another theory is that these are actually *helpful* emotions to keep you alive in a situation that's really threatening. |
Why can we not see our FICO scores but comapnies can? | FICO is actually a business called Fair, Isaac, and Company. They invented the formula that is used to calculate your score. They hold this formula in secret but for a price they will calculate a person's score. You can see yours any time you want, but you likely have to pay for it. The companies that can see your FICO... |
why does college tuition keep gong up? | This is often a controversial standpoint, but student loans make tuition more expensive. You've probably read a bunch of threads about how today's college students get annoyed when they hear stories about how their parents were able to afford to completely pay for college in the 70's with a part time job at a hardware ... |
Why do some armed forces wear Mechanix gloves? | Availability, durability, price, etc. I wore them because they were cheap enough that I didn't care if I lost them, but versatile enough to protect my hands when I needed them. Also, my unit purchased a shit load, so I got a bunch of pairs for free.Think about what makes a good glove for a mechanic. You want some prote... |
How is it decided which states are put on the back of quarters when being made? | They were made in chronological order from when the state became part of the USThey were released in the order that they joined the UnionThe states were minted in 10 week periods in the order they were admitted to the union beginning in 1999 with Delaware and ending in 2009 with Hawaii. This worked out to 5 per year fo... |
Why does the USA have a separate healthcare system for veterans? | > Why not just to give veterans fully paid health insurance to use in the regular healthcare system? This very idea was partly implemented through [Veterans Access, Choice and Accountability Act of 2014] in the wake of the backlog scandal. There are a several reasons why VA had its own health system in the first place.... |
If unemployment is such a big problem, why is accepting so many unskilled immigrants a good idea? | Unemployment is not an extremely accurate/precise metric. Someone with a Master's degree who just got laid off will most likely not be interested in a job picking fruit, but he will most certainly be on the unemployed list. Unemployment solely measures the number of people who are out of work, but want to work; it does... |
How Does Water Get To The Colon? | Digestion requires that the food be fairly liquid and easy to pipe through the intestines which absorb most of the nutrients, but just dumping it out in that form would waste a bunch of water which your body needs. In order to be more efficient the colon removes much of the water before it is expelled from the body. If... |
Why can some people eat whatever they want without working out in their early 20s, but then become obese really quickly once they get into their 30s? | When we're in our 20s our bodies need more energy to fuel growth processes, but after 25 our body is done growing and begins to slowly waste away, this requires less energy, as a result generally we keep eating the same amount of food but don't need it as much, which causes the weight to become fat, which makes us obes... |
what is the difference between the names for groups of animals? (I.e. Pride, pack, murder, gaggle, school, etc) | It's not a scientific difference, just linguistic. We give different names to different things--and a group of one animals is not the same as a group of another. Usually the terms have a traditional origin, though a number were coined in the 15th century. |
Why are places of worship, exempt from income tax? | They are primarily non-profits and like most non-profits qualify for tax exemptions. They do not have an owner or investors who get the money that they collect. Those who work for the organization if they are paid for that work will pay taxes on that income.Because those organizations are organized as and have filed fo... |
Why in some older buildings when you flush the toilet while taking a shower the water becomes blistering hot? | there's two things here. the first ispressure and the second is the pipe layout. if the shower is on the circuit after the toilet and you live in an area with low pressure then when the flush activates the cistern fill, this divertscold water, sometimes most ofit. |
Do household appliances (toaster, coffee maker, lamps, whatever) use any electricity when plugged in but turned off/not in use? | Some rules of thumb: * If the device doesn't have a computer in it, then it probably doesn't use power when off.* If the device turns on and off with a physical switch on the device , and it turns on and off instantly, then it probably doesn't use power when off.* If you can use a remote to turn the device on, it uses ... |
Why does 12 hour time exist? | It's related to why circles have 360 degrees. Back in the day, people thought the earth took 360 days to revolve around the sun. So one degree equals one day. From there it was natural to have smaller units of time which play nicely with 360, and 12 works better than 24. As for why it's not 6 hours a day or 60, or 360,... |
Hayfever: How come, even with all my doors and windows closed, I still wake up in the morning with hayfever? | Do you have air conditioning? Did you seal the bottom of your doors? Are you running a positive pressure internal system? Your house is not air-tight by any means. If you do have A/C, get new filters. Might also consider a large room HEPA filter for wherever you spend most of your time. Also might consider seeing an al... |
Why does cold water taste better than room temperature water? | The temperature of what we eat or drink, has an effect on our "taste receptors". When warmer, certain taste receptors will send a stronger electrical signal to our brain. When colder, certain *aspects* of its taste won't be noticed as easy. With water, when it's colder, we just taste less of it. It's like ice cream. Wh... |
Where does the Ebola virus come from? | > Is it an animal virus like chicken pox or swine flu? Probably, but they haven't identified the specific animal reservoir yet. It's commonly believed to be one or more species of bat though, for various reasons. |
Why can't we naturally regrow tooth enamel? | We do, actually. Your saliva contains dissolved minerals that can 'patch' little bits of wear and tear on your teeth. But it's a very slow process, is usually outpaced by decay, and can't fix anything more than minor damage. The reason we can't regenerate whole teeth is that the cells that produce your teeth die and mi... |
When I'm playing Xbox, why do I feel like I'm falling when my character falls from a great height? | Because your brain sees what's happening on screen and it equates it to falling, and it activates the same receptors that are active when you get that "falling" feeling on a roller coaster. |
What does it mean to "draw heat from a burn?" | It's pseudoscientific bullshit. The only thing you ought to do with regard to cooling burns is literally to run them under cool water for a little bit immediately after the burn to actually physically cool it down. You know what the remedy for a burn is? Put some petroleum jelly or aloe on it if you want to, and cover ... |
Do deaf people think in sign languages? If so, do they see hands making signs in their head? | Have you ever seen a TV program with a sign language interpreter in a bubble in the bottom corner? When I asked once how a Deaf friend thought, that is what he said it was like. Another friend said she just saw hands. A friend who is Deaf and signs, but also knows English really well, said she thinks in either, dependi... |
Why do police officers get away with breaking the law even when there is documented PROOF of their CORRUPTION? | Because it's not what you know, it's what you can prove. A lot of the time, the "proof" against the officer is not actually damning enough to guarantee a win in court. Without an open and shut case, prosecutors are sometimes hesitant to press charges let alone take a case to trial and face the rather powerful Union law... |
Why do multi-packs on Amazon often cost more than buying multiple of an individual product? | Could be an issue with the packaging. Depending on the weight of the goods they might have calculated their shipping cost on a bundle to be more since they might have to use a larger box or a different shipping service. |
Why do some foods take 5 minutes to make in the microwave but take much longer to make in the oven? | Microwaves generate heat by vibrating water molecules so quickly that they heat up. The radiation penetrates the food and hits all of it at once. Ovens heat by surrounding the food with hot air, so the inside of the food is heated by the outside of the food being heated by the hot air. In the oven it takes longer for t... |
How did the pilots in World War II confirmed shooting down, while during all that chaos in the sky it was easy to cheat? | There would often be witnesses from other squadron members in the action. Air fights at that time usually involved formations of at least four planes. There might also be tie-ins to crashed enemy planes an ground observers if the action took place over territory under your control. Nobody would want to be known to stea... |
What exactly is a "crash" a while after drinking stimulants such as coffee or an energy drink? | The 'tired' feeling is essentially molecules called adenosine that are produced in your body. They connect to a receptor in the brain that makes you 'feel' them. Caffeine blocks the adenosine receptors in the brain, kind of like a condom per say. So you don't 'feel tired' since the feeling can't exist because the recep... |
Why are private jet passengers exempt from being searched by the TSA? | TSA is there to protect the public. As these jets are private, they don't really search you for weapons and other things that could harm other people cause well, the people on your jet are people you know and usually don't want to kill.Flights in the U.S. operate under a few different federal regulations. For small pri... |
Why is it so difficult to not think about something. Is there a way around this mental fight? | because it'd be impractical in a natural situation to do anything else. if you're able to communicate something as complex as 'the lions are coming', it's beneficial for the tribe to all be thinking 'omg omg a lion is coming', rather than 'I wonder what's for dinner'. the best way around the fight is to avoid the fight... |
how do clouds hold rain and hailstone? | A cloud is water vapor, plain and simple. It's a puff of mist that floats in the air, and nothing more. No other particles besides little droplets of water held up by wind and heat. Rain forms and falls from a cloud when these droplets clump together, usually converging on a speck of dust, and then become too heavy to ... |
Why is it that when you close your eyes in direct sunlight everything looks blue afterward? | When you put a bright white light in front of your finger, you will see your finger glow red. White light contains all the visible wavelengths of light. However, your finger absorbs most of the colors but lets red light penetrate through which is why you see the red glow. The same thing happens with your eyelids. The w... |
Why can you only record a certain amount of shows on TV at one time? | Usually because the signal for each is encoded onto a carrier signal, and before storing it must be decoded by a "tuner". Your DVR only has a fixed number of tuners. Storing the modulated signal would require a *lot* more data to be saved. There's also the issue of bandwidth. Whatever is storing the shows must have cir... |
I've often heard that during George W.'s presidency, Cheney was the one "running the country". Can anyone ELI5? | Many people have the opinion that George Bush was a kind of bumbling idiot who only got into the Whitehouse because he was the son of a previous President, and people around him knew how to get him there and wanted him there. He probably wasn't all that stupid. But it's also likely that there was an element of truth to... |
The main differences between Baptist and Pentecostal beliefs | There are several. Here's three of the big ones, by doctrine: 1. Baptists believe you're saved, then get baptised. Pentacostals believe baptism is a prerequisite for salvation. 2. Pentacostals believe glossolalia is evidence of baptism, while Baptists do not. 3. Baptists believe that once you are saved, you're saved fo... |
Freud's Theory of Penis Envy. | Copy-pasted from Wikipedia: Soon after the libidinal shift to the penis, the child develops her first sexual impulses towards her mother. The girl realizes that she is not physically equipped to have a heterosexual relationship with her mother, since she does not have a penis. She desires a penis, and the power that it... |
How are coding languages developed? | There are two main classes of programming languages: interpreted and compiled. With an interpreted programming language you have some program in the background that reads in the program and carries out the instructions. This interpreter needs to be written in some other language. With a compiled language you have a sim... |
I'm confused about the whole concept of Effective Altruism. Please give examples! | Effective Altruism just means that you should hold your efforts to a standard that actually improves lives. Non-Profits have a history of doing things because they 'feel right' and are able to raise money for the cause, instead of a cause that will actually change people's lives for the better. A good example would be ... |
How are Jehovah witnesses considered a cult? | One man's mythology is another man's religion. One man's cult is another man's religious belief. One man's religion is another man's heresy. It's rather subjective.[The difference between cults & religions comes up a lot]. There's two different meanings of "cult" that can cause confusion. One is devoid of a value judge... |
If distilled water is just evaporated and then re-condensed, why isn't rain pure water? | Because distilled water is theoretically distilled in a controlled environment. There is dust and pollen and smoke and shit in the air and clouds which contaminate rain.Because there's stuff other than water in the clouds, some air bourne bacteria can float around in clouds and there is a lot of dust up there too. Basi... |
Why does pouring vinegar or peeing on jellyfish stings make them feel better? | These cures are fictional. Vinegar may help, but it's more likely it won't. Jellyfish stings are a particularly nasty sort of attack, because it leaves behind its venomous cells to harm you. If you try to cleanse it with freshwater or likely even vinegar, the cells react to this change by pumping out MORE venom to stin... |
Why a lot of Americans become so passionate/aggressive about whether they are democrats or republicans. | Lots of people in America are like that too. There's a reason that even our biggest elections have voter turnouts of about 50%. That said, especially at the national level, the two major political parties offer very different packages. While you do have a lot of people who are roughly in the middle, who pick and choose... |
shouldn't the US Federal Govnernment break up Comcast in away to avoid monopoly? | Let's think of Comcast, Charter, and Time Warners as brothers. The Federal Goverment is their daddy. Daddy: "Comcast, son, it's been brought to my attention that you are selling your services for too high a price." Comcast: "Daaaaad, that's not fair. Charter and Time Warner are selling their service for the same price.... |
How do racing pit stops work in terms of position in the race? | You lose your position, and have to regain it - but of course, the same is true of the other teams as well, so it evens out. Now - if you can get by with one fewer than everyone else, you may have a considerable advantage.Do you mean what happens if you're ahead and need to pit stop? The other cars keep going. Thats wh... |
When does a puppy become a dog? | When his destruction is no longer adorable. When you have a Puppy: "Aw he knocked over the flower pot, Ill just have to move it higher so he can't reach it." When it's a Dog: "G 'dammit you knocked over the fucking flower pot again, it's right there! do you not see it right in fucking front of you. Go on get out!"When ... |
why are a venomous snake's pupils football shaped, while a nonvenomous snake's pupils are round? | They aren't. Cobras and night adders have round pupils, some non poisonous snakes have slit pupils. Pupil shape is probably more correlated to what time of day they are most active at, with vertical pupils being more associated with nocturnal activity. They may also have links to camouflage. [Source] |
Why are allergies only negative? For example, why doesn't peanut butter act as an antibiotic for some people? | Instead of allergies, let's think of a parallel, like clotting in your blood. Your blood has chemicals in it that cause it to clot. This is usually good, and for most people the system is in balance, so your blood clots when it is supposed to and stops clotting when it is supposed to but otherwise flows normally. For s... |
Why don't we have driver's seats in the middle of the car? | To do so you either eliminate the ability to have a front seat passenger or you make the vehicles much much wider to have two front seat passengers ', "[This post] does a pretty good job explaining why we only put driver's seats on the left or right side. |
Why is there no plans to end gerrymandering? | Because very often the same people who'd be in charge of implementing such a plan benefit the most from the gerrymandering. That being said, it is possible. California, for example, now has their districts drawn up by a committee designed to be neutral. How such a system could be implemented in other states varies depe... |
Why do the normal bacteria in our mouth attack out teeth and gums,but those in other parts of the body do not attack those parts? | The bacteria in your mouth are like junkyard dogs. They are there because they are good at breaking down things that are coming into your body, but they are also aggressive and not well-trained. They'll stop someone from stealing stuff from you, but they might also bite your friend they've never met before. Also, there... |
How does getting haircuts make your hair grow better if hair grows from the root | It doesn't really make your hair grow but it removes all the older & damaged hair at the end of the shaft. A split end can spread down the length of the hair & ruin the whole thing. |
Why do old-timey movies and films always look sped up with jerky movements? | Very old films were shot at a variety of frame rates ranging from 16 to 24 frames per second and shown at differing frame rates. When sound was introduced, everyone realized that a standard was needed . So 24 FPS was chosen as the standard for films. So when older movies shot 16 FPS were archived at 24 FPS, and their m... |
I've read that in the Japanese Parliament, the lower House of Representatives is more powerful than the upper House of Councillors. How so? | Mostly because the House of Councilors is historically the equivalent to the House of Lords in the English system. As in literally when the upper house was created it was directly modeled on the House of Lords. The House of Peers was created originally out of the Imperial court and feudal daimyo under the Meiji Constit... |
When speaking to someone on a cell phone and you hear your own voice echoing back to you, what is causing that? | On the other end, sound emitted from the person's phone is sent through their receiver . This is why if you put two phones really close together and put them on speakerphone, you get a nasty feedback. The initial sound is cycled through both phones, amplifying each time . The mumbling thing is completely normal. Look u... |
Why didn't all the heavier molecules, like gold and lead, sink to the center of the Earth when it was in its molten state? | If the Earth was allowed to sit without cooling for long enough then yes, denser liquids would fall to the core. However, consider orange juice. If left long enough the solid will settle on the bottom, but will disperse in the juice if it is shaken, and doesn't separate quickly either. Also consider oil and water, they... |
why is 'Head and Shoulders' shampoo "For men"? | For most 'drugstore' brands of toiletries like shampoo, soap, and deoderant, the only significant differences between the mens and womens versions of products are: Scent: since most men don't want to smell like tahitian vanilla and most women don't want to smell like whatever-it-is axe smells like Price: you can see th... |
the "such doge" meme | Funny/cute animal coupled with improper English. Same tired formula in a slightly different packageStoned people influence more than you might think. It doesn't take much for a forced meme to take hold. Soon you'll see "doge ^ " shirts at Hot Topic. Within a year you'll see "So wow!" stationary at walmart. |
Why do people have power 'go to their head' when it is suddenly given to them? | People have been trying to answer this question since the beginning of history, it's one of the central topics of Plato's Republic and Aristotle's Politics, and it's been explored by countless psychologists and philosophers since, and as far as I know, there's no solution or explanation. You might be able to get more f... |
Why do aeroplanes retract their wheels immediately after take off but put them back down so far in advance? | As an aircraft is taking off you want to gain speed. Air is particles, and atoms which create drag and slow any object down. They retract their landing gears because you make the aircraft more streamline and allow it to come to speed faster, due to the less drag. It also saves fuel. If something is more aerodynamic it ... |
What happens if I rack up lots of credit card debt before moving country? | You will be paying off a lot of credit card debt while living in a different country.Also, credit or collections companies can go after anyone you listed as a co owner/user or beneficiary on financial accounts. Moving won't save you, and it will also potentially screw over others. |
If I use my phone to take a picture of something on my computer monitor, why does it come out looking weird? | Because your phone's camera has trouble seeing the three-part RGB pixels of the monitor as one uniform color like we do and produces weird rainbow "lines" all over the screen. This might not be all of it though . |
Why do I feel sick/nauseous when on my phone or reading in the car? | You naturally want to keep your balance. This is a natural instinct you will always have, unless intoxicated, but we'll get to that. You have a few ways of doing this, such as eyesight, inner ear balance organs and nerves in your muscles. Normally your eyes will view the sky as up and ground as down, as that is how we ... |
So if wi-fi is a radio wave, why do radio signals (music stations) travel farther than WiFi? Or are they completely different? | If you somehow managed to connect your router to a big enough antenna you could theoretically make your wifi reach the next gas station.However, your router does not have an antenna that powerful because you simply don't need to broadcast your wifi that far. |
Why is it instinctual for people to move their legs like they're running when falling from heights? | Pretty universal? You've seen lots of people falling from heights? What you're describing is a person flailing around to try and orient themselves in the air. As humans we're not very good at it. |
Why is tap water a free resource and will this change in the future? | Tap water isn't free for most people, they pay a water bill through a utility. In some heavy aquifer areas, like Florida, water may be cheap or free, but then sewage and plumbing yo have to pay for to cover water processing. |
How does social media figure out how to advertise something for me even if it’s something I’ve never looked up before? | There's much speculation that these companies are listening to your conversations but no hard evidence yet that I am aware of. The glasses store could be explained by you going there and your wife's phones location tracking not being disabled, then marketing to you by association. The scuba gear scenario is a conundrum... |
Why are "fake news" and "alternative facts" not just called "lies"? | The same reason people call killing people of a particular racial group "ethnic cleansing" rather than "genocide". Euphemism is a tool which can, in the hands of evil people, be used to legitimize very bad things. |
How does the yellow push tape work in American buses? | The tape basically has a wire down the spine and a metal backplane. Pressing anywhere on the tape causes the wire to touch the backplane closing the switch. Vandalism is a bigger problem than wear. The number of pushes on any small section of the tape is quite small , the plastic is harder than skin and the deformation... |
If the combined intestine length is approx. 25ft in length. How does what I eat, affect my bowel movements within hours? | If you eat something that your body doesn't agree with like a bad burrito or something. Your body wants to get it out as fast as possible so it skips most of the digestion and just focuses on getting it out of your body.Simple answer: The front of your guts talk to the back of your guts. Your body says, "We have more f... |
Why cars depreciate and houses are variable? | As silly as it seems, once you buy a car, it is no longer a new car. The market for the car has immediately shrunk dramatically; people who want a new car won't consider it, and dealers can get the same car much closer to wholesale price than you paid for it. There's more to it. Cars improve incrementally each year; th... |
What is the history of the troubles in Russia's Caucasus (Chechnya) | Chechnya lies in the Caucasus area of central Asia. The Russians conquered the area in the 19th century and the Chechens have been very reluctant Russian citizens ever since. When the Germans invaded the Soviet Union in 1941 the Chechens seized their chance to break away from Russia, but after the war Stalin took a ter... |
Why do Africans and South Asians have black skin, while Europeans and North Asians have light skin? | [Evolution of skin colour]: When humans first evolved in Africa about 200,000 years ago we would have all been dark skinned individuals resembling modern African peoples. "About 100,000–70,000 years ago, some anatomically modern humans began to migrate away from the tropics to the north where they were exposed to less ... |
Why are we still making pennies when it costs 2 cents to make one? | A penny does cost more than one cent to make but it is used more than once, so it that way it has a much greater value to the economy than its one cent face value.For the same reason the US tries to bring out a dollar coin every ten years or so, even though a paper dollar is much cheaper to make. The coin stays in circ... |
If women can now hold combat positions in the US military, why are they not also required to sign up for selective service at the age of 18? | The case is very complex and rumbled under political self-interest On April 4, the National Coalition of Men filed a lawsuit asking that young women be included in all Selective Service obligations, the case got thrown on July 29 because the administrative plans to force women into infantry are not yet in place. The ba... |
What causes those crazy light shows when you press on your eyes? | As a side note, I kinda already understand what causes the big green blob - the pressure on the optical nerve. But the actual patterns whooshing past is the big ELI5 here - how the hell does my brain end up interpreting it like that?! There's actual PATTERNS. Moving lights! |
How do inhalers work to solve pulmonary issues? | Asthma: You can't breathe, because your airways are blocked. Inhaler has medication that helps muscles to relax and they stop being swollen", 'There are 3 main types of drugs in inhalers. Steroids, which reduce inflammation in the airways, those generally work over long periods, as do muscarinic agonists which relax th... |
What are the most important auto insurance categories to have high coverage? | It really depends on a variety of factors. If you have a loan or lease on your car then you are required to have physical damage coverage aka comprehensive and collision which pays to repair your vehicle in the event of an accident. The decision to be made here is how high of a deductible to get. The higher the deducti... |
Can two cuttings of the same plant reproduce? If so, are the resulting seedlings exactly the same as their parents? | Commonly. Plants don't get to choose a reproduction partner. Whosever pollen lands on your stamen, that's it. It doesn't even have to be cuttings. Cucumber flowers commonly fertilize themselves. |
how the formula: E=mc^2 works and the experiment which demonstrated this. | As someone said, its not the full equation. However when you plug in p = 0 , it reduced down to E=mc^2. Ultimately it means the quantity we call mass IS the energy of the system when it is at rest. In fact if we use unita in which c = 1, you simply have E = mWhere there is mass, there is energy, and where there is ener... |
Why and when do book pages turn yellow, especially at the edges? | Well, paper is essentially made of two substances: cellulose and lignin. These two happen to oxidate over time and when it does, the paper starts to look yellowish. As the outer edges are more exposed to the air, and therefore to oxygen, they turn yellow faster. |
What is the point of using public key cryptography over symmetric cryptography if both are still cracked through reversing the encryption method? | In symmetric cryptography, the same key is used to encrypt and decrypt the message. If Alice wants to send a message to Bob, she first has to send the message to Bob. This presents a problem - if the key is sent in plaintext, an attacker could intercept it and then use it to decrypt the message. If the key is sent encr... |
Why is it incorrect to say "listening that" but not incorrect to say "watching that", "feeling that", "seeing that", etc.? | Because "listening" isn't to hearing as "watching" is to sight. "Listening" corresponds to "looking". As it would be incorrect to say "looking that", it's incorrect to say "listening that". However, "hearing that" *is* correct. Thus, *hearing* corresponds to watching, not "listening". |
Why do hospitals prioritise type specific blood transfusions, when type o works for everyone? | Type O makes up 47% of the world population. But since not near enough people donate blood, there is a limited supply. This means that they want to reserve Type O for people who can't survive long enough to have their type tested. |
why sometimes there will be a spot on my body that when I scratch/poke it will cause a slight pinch elsewhere on my body. | _URL_0_ Nerves from different parts of the body located closely in the brain. We can actually scratch an itch somewhere we can't reach by scratching something located near enough in the brain. That map also shows which nerves are most sensitive. |
How do business calculate the "maximum occupancy" of a room? | It's usually determined by the fire marshal or some kind of similar public safety agency. It's based on the size of the room, the number of doors, the size of the doors, any stairs and any other obstacles that may hinder people from quickly exiting the room/building in an emergency. For example, if the area had been a ... |
How is term life insurance profitable for met life? | Most people with term life insurance don't die during the period they have the insurance. Insurance companies employ hoards of actuaries and statisticians to figure out the likelihood of death happening, and the company prices around it."Term" has a few meanings, one of which is "period of time" like when we talk about... |
How are countries seperated? | At some point in history they 've decided where the borders are. In many cases it follow a natural landmark like a river, but in others it's just a decision on "this is mine, that is yours" or the result of a stalemate in a war. Granted, it doesn't always work perfectly, there's several places where countries disagree ... |
Musical Instruments - Why are some in concert pitch and others in F, Eb etc | Way back in the day, wind instruments could only be built to play in tune in a couple of keys. It had to do with how the tuning system at the time worked for woodwinds, as well as the complexity of adding keys, and the lack of valves for brass instruments. In order to play in a number of different keys, players would h... |
How do hackers gain access to something? | There are many tools available, but in essence they are looking for ways to make a computer behave in unexpected ways by finding problems with the software that is running on the computer. Depending on just what happens and how; when you find one of these 'weaknesses' or problems with the software it can be possible to... |
Why do hard drives copy really fast at first then trickle the rest of the way? | Most large hard drives have a RAM cache which is an order of magnitude faster than the platters. When you copy a bunch of data, it fills the cache, quickly, then once it's full the transfer rate has to slow to the speed the drive can write to the platters. It's very much like pouring liquid into a funnel. You can pour ... |
Why are adult websites so infested with viruses and adware? | Viruses lurk in lots of ads that tempt or trick you into clicking through. Porn is a category like this, where the user isn't thinking clearly and might eagerly click on whatever link promises XXXExactlyYourFetishHD. Your mom clicks anything that looks like a coupon for something she wants. Teenagers download NewSongBy... |
How remixes can isolate the vocal tracks of the remixed song. | There are two ways. Either you have the instrumental, invert the phase and add it to the original . The second way, which is the most common, is the remixer gets the "stems" to the original, which are the isolated tracks to begin with. |
What exactly happens when you trade in your phone to get credit/upgrades with your cellphone company? | They aren't stealing your personal information if thats what you're worried about. One of the first things they do is wipe it. If you're really concerned about it you can wipe it yourself beforehand. They get them repaired/cleaned up to sale condition and then sell them. Even ones that aren't typically stocked for sale... |
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