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Why do the Scottish want independence? | In addition, I would point out that it's not the Scottish people themselves pushing for independence, but the ruling SNP party - Nearly all public surveys on the subject show the Scottish people are generally in favour of the union: source: _URL_0_ |
Why haven't avocados been bred to have tiny pits? | You can't just "breed" things arbitrarily to have whatver quality you want. You have to find one that naturally mutated that feature, then breed that plant. For example, no one bred seeds out of grapes. They found a grape vine that mutated to grow no seeds, then they grafted that vine over and over until seedless grape... |
If speakers are just magnets, what happens when you blow a speaker from playing audio too loud? | You tear the membrane that the magnet is attached to, a thin surface that is meant to vibrate the air to make sound. [Here are some pics.]', "Usually you've torn the speaker cone, like the other answers say. Sometimes you can damage a speaker by giving it too much power over a period of time, which I assume overheats i... |
When I eat a bunch of sour fruits, for example sour apples or a lemon, why are my cheeks and forehead sweating so much? | I never experienced this myself but was intrigued as to why, so I did some research and found this answer. > In general, sweating is caused by too much heat, even if you're not aware of the heat. This can happen if the bowel moves and so raises the core temperature. Such movement is often accompanied with sweating, and... |
Can someone ELI5 what credit rating agencies are, what they do and why they have so much power? | **What they are and what they do** Credit Rating Agencies try to score corporations and governments on the likelihood those bond issuers will pay back their debts . Three are three big credit rating agencies : Standard & Poor's, Moddy's, and Fitch. Credit bureaus look at the same thing but for individuals . Credit Rati... |
Why do we jump our clocks forward on the 13th? Why not on the vernal equinox instead? | Hour changes are generally planned for the early hours of a Sunday morning, so that not many people are up and getting confused when the clocks change. You go to bed in one time zone, and when you wake up it's another, rather than having to skip an hour completely or, worse still, have extreme confusion at two consecut... |
What happens to dust particles that get in to the eyes and lungs? | If they truly get deep into your lungs, they may become trapped there, but that's a relatively hard place to reach. Most are caught before then in mucus lining your airways. Tiny moving cilia work in concert to gradually move this mucus towards your throat, where you either swallow it or cough it out. Dust in your eyes... |
How do insurance companies deal with huge disasters, like hurricane Harvey or Katrina? | "Reinsurance". Basically insurance for insurance companies to insure against getting hit with too many claimsYou have a bunch of people who pay a premium and never or rarely have a claim that you hope balances out those who do. If you set the premiums right, you cover the claims you have to pay out, make a bit of profi... |
Why do so few smartphone companies use stock Android? | Custom UI means the users get used to that one experience. Companies hope that users will keep buying their products for that experience . Differences are mostly selection of default apps and UI when we are talking about traditional phone companies like Samsung, HTC, LG etc. OnePlus for example changes a lot more 'unde... |
why is everything Windows (or at least not Mac) referred to as PC when PC is a general term for Personal Computers? | It isn't a general term. Pc is a platform. It was originally an IBM trademark. Computers nowadays are PC clones. |
How come we see large bodies of Water as blue? | Well, this is the thing. Large amounts of water appear blue right? Oceans, lakes, icebergs, swimming pools, even a white bath full of water will look slightly blue-ish. Of course it's because water *is* slightly blue. You just need a decent amount of it before that can be seen. A glass of water doesn't have nearly enou... |
How do you become ambidextrous as a child? | I just am. No training or trying whatsoever. I do most fine motor skills with the left and most strength based stuff on the right. I can easily switch if needed but it can also make me very klutzy because I do not automatically hold anything the way it is intended. Can't play golf at all for example. |
Why does water increase grip for fingers on pages etc? | Okay, imagine you just spilled some coffee on a book. You know how it sort of spreads out from where it originally hit the page and winds up being like twice the size of the original stain? This is because of how water interacts with paper--it's called "hydrogen bonding", but all you need to know about that is that it'... |
What is the best way this Ukraine/Russia hullabaloo can end? What is the worst? What is most likely at this point? | Putin will get what he wants in exchange for some token concessions and everybody will relax. Soon after that, he'll do it again with another area. Same thing will follow. Then he'll get over confident and really step in it and a real conflict will erupt. |
How does sucking in your gut work? | Your organs mainly go up. Between your tummy and your chest, there's a muscle called the diaphragm. It is normally used to breathe but you can also use it to suck your gut in . You may also notice that, when you suck your gut in, not only your tummy goes in but your chest goes out, which enhances the illusion that your... |
Do fish die going over large waterfalls like Niagara? | Actually most fish tend to avoid waterfalls. That said, because of their small size they fall with less force than a human, meaning their terminal velocity is generally quite low. Most fish will survive a long drop into the water, and the smallest ones will even survive hitting the rocks. |
Why defaults have less mods than subreddits with fewer subscribers. | It depends on what the mods want and how strictly the subreddit is regulated. In some cases, it's just a matter of the mods having their own opinions on how much work they need to do and how much work each of them is able to put in. Often, it's a matter of how tightly regulated the subreddit is. For example, in /r/vide... |
What causes the brown parts of a banana and should I eat it? | It's fine to eat, it's just because of a natural process caused by ethylene which is a natural compound released by almost all fruit during the ripening process. High amounts of ethylene cause the yellow pigments in bananas to decay into those characteristic brown spots in a process called enzymatic browning. |
Why do we get bags under our eyes? | There are multiple reasons - **Aging** With the aging process, the ligaments underneath your eyes that hold back fatty tissue begin to weaken, and the tissue can fall forward to form under eye bags. **Tiredness or Sleepy Eyes** Fluid accumulates into the skin under the eyes as gravity drags it downward whilst you are u... |
Despite living in famine stricken countries where food and medicine is in such short supply, why do people still have children when there's such high risk of child mortality? | In many countries children are your retirement plan. If a country lacks the social safety net to protect the elderly then people tend to have large families so that their children can support them later in life. They invest time and resources into their children with the assumption that they will be paid back later. Th... |
Why, when writing formal (letters), are (married) women sometimes referred to as Mr. (female's full name)? | If you know it's a woman, Mr. would be an error. Some women see this mistake, I have a friend called Gene Smith, her real name is Genevieve. She pronounces Gene like gene . She gets a lot of mail to Mr. Gene Smith, because if you google "gene smith" you get images of a bunch of guys. In workplace writing Ms. is the saf... |
Rather than have two separate sexes, why are not all species hermaphroditic? | Organisms that exchange genes change more per generation than organisms that don't. As such, sexual organisms tend to evolve a lot faster relative to generation length than asexual ones. Not only does this allow them to more rapidly exploit ecological niches and adapt to change , but it allows them to be *more differen... |
Why is it that when I'm not hungry but I eat something anyways, I instantly become hungry? | The human body has a mechanism to ignore hunger if it goes on without food for a certain period of time so now that you got food it says, "Oi mate, that's my part, you need more food." On a more technical side the brain [stops releasing the leptin and ghrelin] so you don't feel it and are able to focusing on getting fo... |
What is a subsidy? | Very simply, a subsidy is when the government offers money to a group, usually corporations, to achieve various results. This can range from lower prices for the consumer, to help researching new technologies, to an effort to stabilize prices. A great example in the US is farming. As we all know, farming is largely dep... |
Apache (The software) | Apache is a web server. When you make a website it is a collection of files on a computer somewhere. When somebody wants to see your web page, they type in your address and a request goes to your computer. The web server software gets that request and sends you the correct files, including any needed processing, script... |
Why is it so hard to make realistic water/liquids in video games? | Water is made of lots of tiny particles, and these particles are constantly moving, colliding, and changing velocity. Solids have lots of particles, but they don't move, and you don't have to calculate their speed, or how they change position. It's harder for a CPU to calculate how to display water since there's so man... |
Why is way harder to find species where females have to impress males for matting? | Because growing a baby intrinsically requires more resources than providing sperm, therefore more care must be taken in selecting a mate. Waste a bit of sperm on a bad genetic partner? No big deal. Waste a pregnancy on one? Big deal1 male can impregnate many females. 1 female can only be impregnated by 1 male. For the ... |
Why do some flavor combinations taste so well together (Peanut butter & Jelly, pork chops & apples, Lamb & mint, etc)? | Contrasting flavors are often a successful combination because they balance each other; this prevents you from feeling that a given flavor becomes excessive. So considering the 3 examples you give, we have salty/savoury flavors of peanut butter, pork chops, and lamb, which are combined with tart/fruity flavors of jelly... |
Why is japanese porn censored? NSFW | Porn was first seriously restricted in Japan in the Meiji Era, when materials deemed “injurious to public morals” were banned [thanks to the introduction of Victorian morals from the West]. After Japan’s defeat in WW2, American occupation authorities changed many of Japan’s laws to guarantee freedom of speech and expre... |
How long will ball bounce in vacuum | All other things being equal, the one in the vacuum would bounce longer as no air resistance is slowing it down. |
Weakly dominant vs Strictly dominant in game theory. | Weakly dominant theory means that a player will get *at least* as much positive value as any other player regardless of their choice. Strictly dominant means they must get the *most* positive value of any other player with their choice. Weakly Dominant: Choose A and everyone gets $0, Choose B and you get $100, Choose C... |
Why does bread get tough when left outside a bag/box for some time, but crackers get soft in the same situation? | Bread has a lot of moisture . So, leaving it out leads to the liquid evaporating out and drying out the bread. Crackers have very little moisture, that's why they can last much longer than bread. So, when you leave them out, they absorb the moisture from the surrounding environment. |
What did Obama do to deserve the Nobel Peace Prize? | He didn't deserve it. Even Obama acknowledges that. It's been said that it's sometimes given as a form of "pro-active shame" on somebody who might be a war monger. As a way to encourage them to be peacefulThe Nobel Peace Prize 2009 was awarded to Barack H. Obama "for his extraordinary efforts to strengthen internationa... |
why do they always the need to change up the UI of a big social media app? | It’s so they can tell their shareholders/stockholders that they are adding value and keeping their product “relevant” |
Why is it that normal pencils will rub off with an eraser, but color pencils won't? | Color pencil pigment is carried by wax, which only smears around when it's written on something and then erased. You're essentially writing with a form of grease that carries a coloring agent, and like rubbing your finger across a greasy frying pan, doesn't remove it that well without some other form of chemical help .... |
What is happening when the internet stops working, and then somehow working after i replug/restart it? | I assume you mean the router/wifi. A router takes internet traffic from all the devices in your house with internet and funnels it out to your provider. Then all the returning traffic has to be sent out to the right device. It's sort of like working in a mailroom, but at very high speeds. Doing this is complicated and ... |
Why light travels at that precise speed in vaccuum (and not higher)? | _URL_0_ Check out the top comment. Doesn't exactly answer your question but should help wrap your mind around why that speed is significant.Typically the speed of light is thought of as simply THE maximum speed. We then use this fundemental speed to define other properties. However, we could chose to define some other ... |
Why does your body's immunity tank with sleep deprivation? | When you don't get enough sleep there is a decrease in the number of T cells and an increase in the factors that cause inflammation. Inflammation without reason can lead to tissue damage, which also makes it easier for pathogens to start an infection because part of your immune system will be concerned with damage and ... |
On most microphones there is a metal grate that you sing or speak into, why does this not distort or muffle the voice? | The short answer is that the openings in the grate are wide enough to as to avoid any major impact. It *probably* does make a tiny difference, but it's an acceptable trade-off for the sake of the microphone element's protection.The metal grill's purpose on microphone models like the most common live vocal mic, the SM58... |
Why do people lose weight during sleep? | You body is taking in oxygen, and breathing out oxygen plus hydrogen and oxygen + carbon . That is basically how *all* long term weight is lost, and over the course of 8 hours, it adds up. Also, you perspire while you sleep, and that contributes too. In addition, bathroom scales are not terribly accurate, and differenc... |
Why do most men get a feeling of regret right after finishing jerking off? | Woah, that can't be right. Masturbation is one of mankind's best tools. When I was single and thought I liked a girl I would spank it before calling her. If I still wanted to talk after getting off that was a good sign. I have never felt guilty about masturbation btw.Here are you getting this assumption? By saying most... |
Why do our bodies feel so cold when we're sick? | It's going to blow your mind, but you're not actually cold when that happens. Chances are you actually have a high fever. This most commonly occurs as a fever "breaks:, or reaches it's maximum. The chills are not actually the result of you feeling cold, they're the result of muscle contractions your body is doing to ra... |
What is actually happening in a person's body when they build up a tolerance to a drug or alcohol? | "Reward" or "pleasure" comes from your Nucleus Accumbens in the brain, which is partly mediated by the Ventral Tegmental Area. Along with other structures, the VTA stimulates the Nucleus Accumbens with neurotransmitters, most commonly dopamine. Drugs alter the effectiveness of this stimulation. After awhile, your body ... |
Why do some people move a lot in their sleep whilst others stay still? | I've always kind of wondered this. One time when I was little I had a dream that I fell off a cliff. I woke up the next morning on the floor and couldn't remember how I got there. |
How is currency/money in banks and other financial institutions safe-guarded from computer-based attacks? | Insane amounts of backups. The record keeping is highly regulated and by law the banks/financial institutions must follow the rules of having the information secured, AND backed up in a number of ways. Worst case scenario, they would have to stop all transactions and fix their databases. Source: I build these systems.T... |
When a live sports replay is "brought to you by Home Depot" and other oddities, how is this effective marketing? | It's known as brand building. They are trying to make you remember their brand name on a deep, visceral level. Their name just becomes part of the language. So, the next time you think about needing a tool or building material the first name that springs to mind is Home Depot. They're hoping that this association is en... |
With almost everything having a generic version these days, and all of the competition in the furniture business, why isn't there a Sleep Number clone on the market? | If there's no competition for a product, it could mean a few things: * The company making them holds a bunch of patents which prevent a competitor from legally making clones* The start-up cost is really high to start producing clones* The inventing company has so much name-recognition that it's impossible to compete ag... |
How does karma, reincarnation and all that work in Hinduism? | An incarnation is like a character that the soul plays in a play or a game. Each character has a "right way of doing things" . In the case of humans, each caste has its own right way of doing things. Behaving according to this way improves your *karma*, and behaving against it degrades it . When a character dies, the a... |
Can somebody tell me how Tobin Taxes work? | When you think of buying something, what you are usually doing is trading your dollars for candy, or movie tickets, or whatever you're buying. If lots of people want to buy candy, the candy salesmen can raise the prices and make more money. This is called demand. Of course, if you're buying candy in, say, Germany, you ... |
Why have a European Union and not just massive country? | Forming a big "country" comparable to the United States would mean the creation of something like the USA's federal government. This means that the individual states would have to give up some power and control over their own rules/people to this government. This is a tough sell. The European Union grants them a lot of... |
Why are electrical lines slack between poles? | Because if they were pulled taut, then a strong wind could bend the poles away from each other and snap the lines, loosing high energy power lines onto the ground below which can be extremely dangerous. A little bit of slack is just fine.There are a few reasons. First, they're metal. Metals expand and contract with hea... |
What happens to a text message when the receiving phone is turned off? | > And also, once the receiving phone is turned on, how does the text message service detect that? When your phone connects to the network, it performs what's evocatively known as a "handshake." This process of establishing the connection informs the network where to direct a call that will terminate on your handset, so... |
Whats so bad about the Koch Brothers | Specific political agendas and corporate greed aside They symbolize the dying of democracy. Basically, we vote based on the familiarity and likability of our candidates. When someone gives millions of dollars to a candidate then they have an advantage over other candidates that increases their ability to get elected. M... |
Whatever happened to all those 1-900 psychic / astrology lines from the 1990's and early 2000's? Why isn't that a thing anymore? | They moved online, hotline number s like that just changed with the time as More people got intratnetI had a couple of friends who worked as phone psychics in the \'90s. It was a rather slow decline; they went from working in offices at large cubicles for a few years to working at home with a company-installed line. Th... |
What's with getting goosebumps when you have the craps? | Probably the diarrhea is due to your body detecting some poison or pathogen attacking your body. One way to help fight it off is to increase the temperature in your body, and the hypothalamus turns up the normal temperature your body tries to maintain. Your body then recognizes that it is colder than it thinks it shoul... |
Why are western countries not investing more heavily in renewable energy when they're spending £Billions on foreign oil | Because they honestly. Don't want to. The places that are trying, are doing relatively well with it, but honestly it all ties into capitalism and the lack of want to try new things. Until we actually run 100% out of any source of petroleum product, be it cornmade biodiesel, used vegetable oil, etc, only then will we pr... |
Why are firearm designs so old, specifically handguns? | Because they are reliable. And there is a small reason for making a new design when the old one is still making money. Hope that helps :)Simplicity and reliability. Firearms use very basic mechanics. An explosion of gasses pushes out a projectile. When dealing with basic mechanics the simplest designs usually work best... |
Why is turning it off and on again so effective? | Think of it as priming a pump. If there are bubbles in the piping, a pump won't be able to push through. But drain and then refill the water, which will most likely have no bubbles and the pump will work fine. There are problems like this in electronics as well - where they can reach a problem that is stable , but coul... |
Why does very famous and well-known companies like Coca-Cola keep spending millions on advertisements? | Simply put, new buyers are being born every minute, and they have to be marketed to or they will go to whoever is marketing to them instead of you. Does Coca-Cola or other huge names benefit from a massive momentum due to market share? Yes. But this would drift down steadily if they did not keep marketing to people. Ke... |
What does it mean when a drug addict has "collapsed veins"? Why do they have to keep looking for different veins over their bodies? | Because when a vein is injured, as it is normal with the rest of our body, it starts an acute inflamatory response. The idea of an inflamatory response is to repair the tissue to what it was before. When a tissue is repeatedly injured in the same place over and over again, the inflamatory response turns to a chronic on... |
What the proposed Tory social care reforms are, and why some people are calling it the "dementia tax". | There's multiple components to it. David Cameron worked to put into legislation a cap of 72,000 pounds sterling on social care bills to be introduced in 2020. The idea was that middle class retirees with long-term care conditions such as dementia wouldn't have to sacrifice everything they owned to pay for that care. Ma... |
Does the ban on news outlets from the White House press briefing violate freedom of the press? | No. Those outlets remain free to report whatever they want to report. The 1st Amendment does not guarantee anyone access to White House press conferencesCan someone explain honestly why they got banned? |
Why is it when it rains in a baseball game the game gets postponed til further notice but in American football the players play through any weather? | I was a house league umpire for a few years. For us, we would play in the rain until we had puddles forming. Most baseball diamonds are made with very rough dirt that can not only get extremely muddy, but can cause some nasty infections if you end up slipping in/on a puddle and cutting yourself on the rough dirt . Furt... |
Why isn't it good to have a lot of vitamins at once? | The difference between a thing being healthy, and a thing being unhealthy, is quantity. Vitamins are necessary for human survival, but you can also overdose on them. Overdosing on vitamins can have various dangerous effects, depending on the particular vitamin. That being said, even if you don't eat enough to suffer co... |
What would happen if you took off your helmet in space ? | You definitely wouldn't explode or anything dramatic like that. There have been a few astronauts who were exposed to vacuum or near vacuum and were successfully revived. IIRC less than 45s or a minute is survivable. |
Why does Soda become flat(uncarbonated) when you shake it? | Left alone, CO2 dissolved in the soda will come out of solution and go into the air. Shaking it provides way more opportunities for an individual CO2 molecule to be exposed to the air and in a position to leave the solution, so the rate of CO2 leaving the solution increases. |
What causes differences in the appearance of ice (ex. see-through vs. white)? | It's the purity of your water. I saw it on Nat geo on a show called "going deep with David Reese" the purer the water the clearer it is', "I believe that it's mostly the air in the ice. Supposedly if you boil water and freeze it after, it should be clear. |
What exactly happens when you look at an eclipse without eye protection? Is it the same as looking directly at the sun on a normal day? | You really should do a search before posting, but since you're here, and since I know the answer, I'll respond. Looking at a solar eclipse without eye protection is just as dangerous as looking at the sun on a normal day, and possibly even more so. You see, on a normal day, with the sun shining brightly, you may find i... |
During a divorce why isn't custody entirely up to the child? If they're old enough to properly understand and make decisions? | Until a child is 18, they aren't considered developed enough to be making legal decisions. They can testify and favor a parent, but it doesn't make a definitive choice. Once that child hits 18, they're allowed to live with whoever they want.As a society we like to pretend we care about "the children" but we give childr... |
What exactly are dogs trying to find when they sniff around looking for a place to go to the bathroom? | I think they're looking to see if other dogs/animals have left their scents around. Once they 've figured that out, they leave their own mark signifying their claim on this territory: "I know you peed here earlier but this is my land now."Looks like science has an answer: Dogs use Earth’s magnetic field to decide where... |
Top people on Instagram likes | It's a formula that is, as you've stated, based on your interaction. You like their stuff, they like your stuff, Instagram realises this and makes you see more of each other. Facebook does this too and so will almost every social media site. |
What are cycles in a log-log paper? Why do the scales from one to ten keep on repeating? How does plotting on it is done? | Now that I see your slide rule picture, I will tell you how to multiply with it. Slide the 1 on the C scale over the 2 on the D scale. Now read off under the 3 on the C scale, and you should see a 6 on the D scale, because 2X3=6 Feel free to ask questions if you don't understand anything I posted. |
What is China planning with docking their aircraft carrier in Syria? | The middle east is in a real state of flux at the moment and the Syrian situation means that there is currently a struggle for power. Both the Russians and China are now moving in so that when the time comes, they will have a hand in dictating who comes to power, as it's in their interests to have influence in the midd... |
Why is personal space so exorbitantly big in Nordic countries? | My guess would be that because of the very sparse population most of the inhabitants in the past never had to face city conditions with compact space and large crowds. Personal space gets smaller only with urbanization and Nordic countries haven't had that large urban settlements to really change the perception of pers... |
If principle photography is done AND a teaser trailer is out, why wont the new Star Wars be in theaters until next December? | Post Production. This is when all of the CGI, sound mixing, editing, scoring and much much more is done. Additionally, they're will probably be reshoots. Therefore, the one year gap gives them plenty of cushion time.The majority of the man hours will be done in post production. They have a lot of green screen footage, ... |
ELI11: Historically, why bladed weapons produced in the Middle-East/South Asia tended to be curved (like a scimitar), while in the West, straight (like a broadsword)? | There's a lot of factors, and there are definitely examples of Western curved swords and Eastern straight swords . One factor is the types of armor in common use. Some types of armor protect better against slashes, others against stabbing. Straight swords tend to be thrusting weapons, usually, with a bit of chopping, w... |
If you don't eat meat, you're a vegetarian. But what are you called if you don't eat fish. | No meat, but still fish = pescatarian No meat, but still able to eat eggs and such = vegatarian No meat at all, not even anything that comes from an animal = vegan |
Why is Justin Trudeaus approval rating so low? | He's made some blunders with the Native communities with breaking a few promises. Major promises, even. Adopting the UN policy nited Nations Declaration on the Rights of Indigenous Peoples, going back on giving them the ability to beta development that affects natural resources, lifting a cap on funding for First Natio... |
How do Micro SD cards store information, and what are the advances that make new ones able to store more information than older ones? | All sorts of solid state memory store data in super tiny capacitors. New ones can store more because manufacturing improvements have allowed more storage to be affordable. Companies only make things that people buy.It's mostly the improvements in manufacturing methods that leads to capacity increase. Most notably the a... |
In "older" shows and movies, why are the shots used for cross fades, of lower quality than the rest of the shots. | The short answer is loss of information. EDIT: still same short answer, but I think the 'optical printed dissolves' as the correct answer. Leaving the rest for reference. -- Historically, most video is/was compressed using YUV planes, where the Y plane is the luminance and the UV planes are the chroma . Older color tel... |
Why does nausea seem to come in waves? | It can come in waves as the natural movement is reversed, and involuntary contractions in the walls of the stomach and esophagus force the stomach contents out', "To throw up is generally an unhealthy action. It's normally best to keep whats in your tummy in your tummy. Throwing up is an EXTREME reaction that your body... |
What does it mean to be an American? | Where you are free to have your own thoughts and live your life the way you desire within the limitations of the lawTo be an American you must either be born on American territory, born to an American parent or go through the process to be an American citizen. |
How do game developers secure their code for their game in that way that it simply won't be copied by any other game company/game developer? | Most games are written in C++. When you program something in C++ you run the code through a program called a compiler, which turns it into a form that the computer can run. You can't get back to the code that was originally written from that, too much information is thrown away. It is possible to inspect this compiled ... |
When a town or a city elects a dog or a cat for mayor, how does that end up working? | It is never official. Typically it only occurs in unincorporated towns where they don't have government at anything lower than the county level. Such communities will often elect an unofficial mayor as sort of a spokesman. Since there are no real laws covering this, there is nothing stopping them from getting silly fro... |
Why is an excess of (salty) saliva produced when about to vomit? | The belief is that it's to protect your teeth. Stomach acid is very destructive to tooth enamel. Saliva helps dilute and neutralize the acid. |
Why have Christianity and Islam been so successful? | They are both religions that place a heavy emphasis on evangelizing and spreading the word, and were both adopted by peoples who were highly mobile, both as traders and invadersChristanity was a slave/servant religion with many of the early converts filling this role in addition to former Jews filling the ranks. Acts o... |
How E. Coli bacteria contaminates vegetables. | Poop from cows, chickens, etc., is used to fertilize vegetables. Sometimes, that poop contains bacteria like e. coli which gets on the outside of the vegetables. If the vegetables aren't cleaned before people eat it, then people can get sick. The easiest way to keep yourself safe is to always wash your vegetables befor... |
How did they get the carriages into the Glasgow underground? | There is an above ground depot at govan with tracks leading between the depot and the main lines. The depot was built in the 70s, prior to that the cars were craned in through a hole |
Why do most countries limit work/travel visas to 30 years age or less? | I think the type of working holiday visas that allow people to stay for a year and work a while doing so, is usually restricted to age 18-30, because it is primarily intended for students who take a year abroad. There tend to be plenty of other visa types that don't limit the age of the applicant like this.Would it not... |
how does the tab on the rear-view mirror work? Dimming bright lights but still letting you see out the back window | There is a piece of glass in front of the mirror that is angled away from you when the tab is in its normal position. In the normal position you are looking at the reflection from the mirror and not the glass. When you flip the tab the mirror becomes tilted so it no longer reflects the light toward your eyes, but the g... |
how does urinating after sex prevent a UTI if the urethra and vagina are not connected? | Penis goes in and out. Penis rubs vagina juice against urethra at every stroke. Pee to cleanse out Vagina juice from Urethra. The endThe urinary tract is the tube that connects the bladder to the exterior and where the urine flows. Peeing flushes away anything that may have entered the urinary tract.The simple answer i... |
Why does the United States still choose to retain Imperial units? | It's a legacy system thats been in place for hundreds of years and covers over 300 million people across 3.8 million square miles . It's not something you just flip a switch on. It would be like suggesting that countries switch what side of the road they are driving on. Logistically it's just not worth it. Many things ... |
When I'm sick, why do my nostrils take turns in being blocked/stuffy? | Even when you aren't sick your nostrils go through a cycle ) where one becomes partially blocked and the other does all the work. You just notice it more when you are sick. |
What is holding us back from making a space elevator right now? | we don't have a material strong enough to make the elevator shaft. all materials we have today would simply snap from its own weight if we make it 250 miles long and tried to dangle it like a string.No material currently exists with the required properties for the elevator. First we need to invent something strong enou... |
When driving and getting tired to the point where falling asleep is a real concern, why does simply pulling over and getting out of the car for a minute re-energize you so much? | Like the other comment said, you're getting your blood flowing. In addition, switching up the task you are performing keeps your brain engaged. If you're driving in a downtown area where you have to watch other drivers, check for pedestrians, switch lanes often, etc. you are probably not falling asleep because there ar... |
What are the heights of mountains measured against on planets without seas? | The Datum. Simply put, imagine running a bulldozer over the surface, smoothing down everything that sticks up, and using that stuff to fill in all the troughs and holes. The resulting surface is the referenceIt is based off of a specific atmospheric pressure. The earth has 29.92 inches of HG at "sea level." It depends ... |
if rain falls down when clouds are fully condensed, why does it sometimes drizzle, and other times it rains heavily? | Drizzle happens when there isn't a strong updraft to keep the water in the clouds. When there is a stronger upward air current, the water can keep combining with other water droplets and grow larger. The stronger the upward current, the bigger the drops. Oh, I forgot to add that drizzle comes from lower Stratus clouds ... |
Why don’t airports and air travel companies update from the staticky ATC systems to something that is able to be more clearly heard and understood. | Your cellphone also loses signal if it goes into a tunnel. Your cellphone is fm radio, pretty, nice, but weak signal. Plans are on lower frequencies, AM radio. Shittier quality but a much stronger signal strength.The static is a result of the Amplitude Modulation used in the ATC system. AM varies the radio output direc... |
why would an international football team have a goalie that's never saved a penalty in his career? | Firstly, he's young for an international keeper so will have faced less penalties skewing the statistic. Secondly, saving penalties is a tiny fraction of what a goalie has to do. |
Why is it so annoying to touch something fuzzy right after I clip my fingernails? | Because your nails snag the fuzzy thing. I can't stand it, so I file my nails after clipping them. |
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