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How do spiders avoid getting stuck in their own webs? | Some spiders produce oil that makes their legs more slippery while at the same time they have small hairs that get smaller at the ends to allow for less surface adhesion. Other spiders it is still unknown. Technically, they do get stuck to their web but they can get unstuck kind of easy.Not sure if true but I heard the... |
ELI: The current debate in the UK about the EU. | [This] excellent post by /u/loudribs over at /r/unitedkingdom gives a good overview of the pros and cons. |
Why is it that in the dark when staring at something in your peripheral vision it is easier to make out then directly staring at it? | There are two types of receptors in your eye. Rods are good at detecting contrast and movement. Cones are good for color and detailed information. There are more cones in the center of your retina and rods in the peripheral. Night vision relies a lot more on contrast, thus your peripheral is better at itDuring the day ... |
Why does the fiscal year not line up with the calendar year? | A fiscal year can start whenever because a company can start whenever. Your first 365 days of operation are your first fiscal year. If you don't start your business on January 1, it won't line up with the calendar year.Businesses close their books at the end of the fiscal year. Without getting into too much detail, clo... |
Why the Mexican Drug Cartel is so violent? | Every time a new president in Mexico comes along, I think the drug dealers bribe the president a large amount of money to let them sell their drugs in peace. Our last president Felipe Calderón, didn't accept this "bribe" and instead tried to put a stop to drug dealers and all that stuff. Well for the past six years, th... |
Why don't public schools teach personal finance and nutrition? | I finished high school last year. They do, extensively. I honestly don't understand why this question is CONSTANTLY asked, because it's always the same answer |
What is happening when i'm 'hot' in a sport such as basketball and keep making shots | The real answer, from my understanding, is your mental state, which can affect your physical reactions and movements. You make one basket. You are happy. Pumped. You are now in a good mood. When you go to make that second basket your body is actually making small adjustments, based on your state, that help to make more... |
How come the bridge on a large cargo ship is located at the back of the ship, but the bridge on a cruise liner is located at the front? | Cargo / tankers have controls aft because that's where the engines/propulsion are, and it keeps the controls from being in the way of cargo. The engine in the rear makes it slightly harder to operate , but the extra cargo room and reduced complexity makes up for the inconvenience. Cruise ships keep their bridge in the ... |
why do carrots bend outwards when cut along their length? | There are three things going on here: 1. Over time, a vegetable will dry out from being in contact with dry air, even in your Fridge's crisper drawer. 2. When a vegetable dries, it shrinks. 3. The outside will dry faster than the inside since it is in contact with the air. All of those together, we see that the outside... |
Can the brain achieve full silence, or is a 'full silence' simply learning to ignore arising thoughts? | I believe the only time the brain achieves full silence is when its dead.Everyone's brain eventually achieved full silence. It's when you die. Your goal shouldn't be to achieve full silence, your goal should be to achieve a perfect awareness and acceptance of what is going on around you, without focusing on any of it. ... |
Why is the Russian Ruble collapsing? | Most of it is a collection of fairly simple supply-demand issues. In no particular order: 1. Russian companies owe a lot of dollars in loans to foreign banks. They have to pay off these loans in dollars, around $100bn in 2015 alone. Normally they would just refinance/burrow more dollars overseas, but now that they can'... |
Why do websites push us to use their app? | Your mobile phone can expose your name, number, current location, contacts and call history, etc. This information in extremely valuable in today's business and political world for many reasons. Advertisers purchase this kind of information to better keep track of what products you are interested in, and government int... |
Why do medical professions always seem to work long consecutive hours? | > it seems needlessly tiring, and maybe dangerous. I'd agree with you there. According to a friend of mine who's just about to finish up nursing school, at least for hospitals, the idea is that you want the same person treating a patient for a longer length of time, so there are fewer change overs and thus fewer opport... |
What exactly is happening when your skin is getting tanned? | Your body is receiving a bunch of UV light and responds to this potentially damaging circumstance by producing melanin, a dark pigment that's really, really good at absorbing UV light before it can damage your tissues. The more sun you get, the more melanin your body produces . People who's ancestors lived in tropical ... |
How can cable send hundreds of HD channels at the same time but my internet is slow? | It's the difference between using a megaphone to talk to 100 people, and using 100 telephones to talk to 100 people. There is no two-way communication with cable , and you are only handling 1 signal instead of a separate signal for each person. |
how does a computer start executing commands when its powered on? | A assume the answer the BIOS starts executing is not sufficient. Because this rises another question. How does the BIOS start? In reality there is a circuit in the board of the computer that detects that the power went from off to an. After a few miliseconds that the power has stabilized this circuit issues a pulse to ... |
How universal is Modern Standard Arabic as a spoken language? Would a fluent speaker understand and be understood verbally as their geography changed, or would knowledge of dialects become vital? | I'm not sure if you understand what Modern Standard Arabic is. It's not a real language, it's an artificially created standardized version of Arabic. It was created in the early 20th century on the basis of classical Arabic and contains many elements common to all Arabic dialects. So it's used in the media, in schools,... |
How did Gold become the universal currency? | [Here] is a good NPR article answering that exact question. ----------------------------------- To start, we need something for a currency. Life is way easier with something for a currency. So what do we use? We need: * Something rare but not too rare* Something that's not a gas* Something that won't explode* Something... |
How does the nicotine in cigarettes make you addicted? | Nicotine is addictive much like caffeine, but it's not just the nicotine that causes addiction. There's hundreds of "ingredients" in a cigarette. When you light it on fire, the combustion turns those hundreds into thousands. You eventually become addicted to several of those chemicals. I don't know which ones specifica... |
How come objects that are much smaller than they usually are, appear "cute" to us? | Cuteness is tied with vulnerability, and things smaller than ourselves are more often than not vulnerable.A small version of a human adult is a baby, and babies are cute . Small things make us think of babies. |
Why movies obviously photoshop the faces of the cast on "family" pictures that they could of easily just taken pictures of? | Well you can pay some low level photoshop monkey $15/hour to do the work on this in like just an hour, or pay for an entire photo shoot, actors, photographers, make up people, lighting and such, which can easily be in the tens of thousands of dollars and take a whole day. Or just pay that guy $15 and have it done in an... |
Why has the English language changed over the years so that words which are written the same aren't pronounced the same, yet phonetic languages haven't. | It has happened in other languages as well, but probably English seems more like a mess because there's no organisation to actually sit and decide how language is regulated. In that time, English was still trying to get used to the changes by the [Great Vowel shift] which later on, kept merging and changing pronunciati... |
Instead of remembering dozens of complicated passwords, why don't we use just use fingerprint or retina scanners for everything like bank accounts, emails, online accounts etc? | If your password is compromised, you can change it. But if someone gets a copy of your fingerprint, well, you only have ten fingers. In general, security is considered to be some combination of three things: 1. Something you are. This includes biometric data like fingerprints and iris scans, and should be treated more ... |
How IBM's Watson was programmed, what it can do for us now, and what it can lead to in the future | The version they show on Jeopardy is essentially a search engine that scans a lot of data from the internet. There's business applications for it that boils down to analyzing huge amounts of data and coming up with some type of conclusion/recommendation. Go to _URL_0_ |
The third law of thermodynamics | Think of water. When it is hot, it is in a gas form and the molecules can move freely . As it cools, it changes to it's liquid form . The molecules can still move, but not as freely as in the gas form . As it cools further, it changes to it's solid form . The molecules movement has been reduced greatly. Now going back ... |
How human bodies will not recognize or ignore pain during physical altercations and injuries. | Your nervous system floods your body with chemicals that amp you up to fight, which in turn also releases endorphins that block pain so that you can continue to fight and possibly live in a life or death situation. It’s survival. |
Why is it legal and considered okay for Native American tribes to hunt whales, but when the Japanese hunt whales it is considered an animal rights issue? | small scale food and resources compared to large scale industrial whalingThe tribal peoples who do it do it to survive, and they kill maybe a few a year per tribe. The Japanese have an industry built around it and could decimate the species for money. Culture is more important than a few animal lives, but keeping the s... |
How does the massive amount of internet shaming and negative media coverage affect companies like Comcast? | Comcast specifically? It doesn't. Comcast has a monopoly in a lot of areas, they have no reason to improve. |
why does blood pressure raise abnormally when getting angry or stressed out? | When you get stressed your body released more of a hormone called cortisol from your adrenal glands. This hormone among other things increases blood pressure. The point of a stress hormone like cortisol is to help when you're distress . The problem is the benefits of cortisol are short term, but long term exposure can ... |
Is there any reason broken pieces of technology start working again after you stop using them for a while? | Bad solder joints. They don't connect completely. As humidity/temperature/etc change, the solder expands or contracts and the connection returns. A good whack can often have the same effect.If the reason a device stopped working was due to a thermal shutdown then yes, it cooled down. But otherwise I have no idea what y... |
Why are even numbers easier to deal with than odd numbers when doing simple math in my head? | _URL_0_ tldr; Odd numbers are asymmetrical and unattractive because we're hard wired from a young age to find even numbers appealing and relate-able. |
Can the average human brain create/imagine a unique human face or is it all based on faces already seen/remembered? | There really isn't any way to answer this question scientifically. But the human imagination is actually not that great at coming up with entirely new creations. Almost anything that you can possibly imagine is a combination of other things that you've seen before. That's why it's impossible to imagine a new color. |
Why are some color matches pleasing to our eye and why are some not? | Not sure just making a guess: Most of the time matching colors are complimentary I'm assuming our eyes like the variation of color because it is a break from the monotony of say red and orange. |
How does a disease effect a country's economy? | A heard a good example using AIDS in Africa. If 5 million people in a country are suffering from AIDS, they're going to need another 5 million people to care for them. That's 10 million people who are out of the workforce, which is going to hurt the economy. That's a super-simplified point of view, of course, but shoul... |
What is the next step that we need to take to create AI? What obstacles are holding us back? | Two things. A lack of computing power, which is slowly being eroded. A lack of proper definitions. The easiest example is object recognition. It's easy to explain to a computer what 1+1 is, but trying to explain to a computer what a banana is under every possible condition is borderline impossible. Humans have clever i... |
Why can I vividly picture a person in my mind, but not "see" the details if I were to draw them? | It's a learned skill. My art teacher in college could draw faces he saw to almost exact proportions. You just need to practice doing it. |
Can someone please explain Supply Side economics to me like I'm 5. | Supply Side Economics is a philosophy that the economy runs best when there are the fewest restrictions on the corporations that produce goods, hire people, etcetera. This means less regulation and less taxation. Is it legit? Hard to say. The trouble with economics is that you could put 10 economists in a room, ask the... |
Why is it painful when my legs "reawaken" after falling asleep? | When your limbs are falling asleep it is actually your body adjusting for the constant sensory input and assumes that since all past sensory impulses were similar it can ignore those and even shut down some nerves. When you introduce new impulses to awaken your limbs it is a sort of sensory overload as these actions we... |
What is happening when I blur my vision at will without crossing, squinting, or moving my eyes? | You're focusing at a distance where there is nothing, so everything goes out of focus.I can do it too! . As FriendlyCraig said you're using the lens muscles. If we do it the same way, then it's the opposite of what FX114 wrote: you're actually forcing a close focus, so if you hold your index finger at about 20 cm from ... |
Is a global universal currency a good idea? Why/why not? | Probably not, but let's examine the effects and let you decide for yourself. One effect is that you wouldn't need to trade currency anymore. This would make tourism easier, since you don't have to exchange currency at the border . The downside is that people that work at currency trading would be out of a job. Another ... |
In the USA, why should I vote in a presidential election if the electoral college chooses the victor? | The electoral college almost always votes the way the popular vote does. The issue is that in most states all the electoral college votes go to the popular vote winner. So for instance, if 51% of the people in a state vote for Candidate A, he gets 100% of the electoral college votes from that state, rather than getting... |
Why is farting more embarrassing than belching? | As explained *by* my five year old "Because it comes from your butt! Ha ha ha!"Generally an anus is less socially acceptable than a mouth.Some points i thought up:1) fart = stink, burp = not as stink2) burps are quite easy to suppress, so if one burps in public it's assumed it's on purpose so you can't be embarrassed, ... |
How can dogs and other animals sense things like earthquakes? | It's either 1) [not entirely true] or 2) PFM . In other words, we haven't been able to reproduce it, so there's no way to study it. |
Why dont all planes have an aircraft recovery system thats built to only track airplane locations 24/7 | You might have to expand on what you mean by your tracking system. All aircraft in controlled airspace are tracked from the ground by air traffic control. Plus all commercial airliners, at the very least, contain a tracking device onboard, which revords things like position, bearing and even the cockpit conversations. ... |
Why does scratching my balls feel so much better than scratching any other part of my body? | Here's a tip for all holy ball scratchers: Go to the drug store and get an exfoliating glove. So much easier for scratching, the best. You're welcome.Because it has a lot of nerve endings? It also feels good when having sex so based on that logic it will also feel good outside sex. |
Why my car won't start when it's cold out | Your battery uses a chemical reaction to produce the electricity needed to run your car. When it's cold out this reaction slows down, decreasing power output. Your engine oil also gets thick when cold. It's harder to move engine parts through thick oil. |
How are we able to see through glass and other solid transparent objects? | Some materials don't interact with light at certain wavelength ranges. Those materials that don't interact with light between 390-700nm we humans call transparent because our eyes see that range. However water is not transparent at other wavelength ranges, it blocks. other wavelength of light, like radio waves, are blo... |
If perspiration is a natural process that our bodies' go through to remain cool, are we not harming our person when we apply antiperspirants? | Slightly, but the truth is our body is very good at regulating temperature; if the heat can't leave through our armpits, it just finds another outlet . To give you come perspective, there's a really interesting surgery they can do for people who sweat too much from their upper body . It's called an endoscopic thoracic ... |
Sociologically, in an abusive relationship, why doesn't the abused partner leave? | I don't know if this explanation is *sociological*, but one thing to bear in mind is that abusive people aren't usually happy, healthy, well-adjusted people who have a bad habit of beating their wife. They're usually in a lot of pain and they don't have the tools to manage it correctly. A lot of times you know exactly ... |
Why is the UN in New York instead of a neutral country like Switzerland ? | There's two parts to the answer. It's in the United States because a vote was taken on where it should be, and the United States won. > When a vote on the location of the headquarters was taken in London in 1945, the United Kingdom, France, the Netherlands, and Canada voted for a European headquarters. As Mires writes,... |
What is stopping new life from being "created"? | Several options to potentially answer this concern, any or none of which may be right - we just don't know for certain. 1. Extreme improbability: Life is unbelievably improbable - the processes required for the development of single autonomous cells, let along multi-cellular organisms, to arise are incredibly complex, ... |
Why do TV's use red, blue, and green for their pixels, but red, blue, and yellow are the primary colors? | Red blue and yellow are the primary colors for paint and the such, red blue and green are the primary colors of light.Edit: I suppose technically magenta cyan and yellowRGB are additive, they sum together to produce colours, RBY are subtractive, they remove colours to produce other colours. _URL_0_ |
Do Diet soft drinks prevent you from weight lose? | the most rational argument I have heard for this is that by consuming fake sugar, you will crave real sugar. And by rule, you will cheat. Not sure how legit that is if theres science to sugar flavors causing sugar cravings None that I have ever seen. I dont put much stock in it myself. Or atleast knowing the risk shoul... |
The IS/LM Model in macroeconomics (cross-posted in r/Economics) | When interest rates go down, the cost of borrowing money goes down, so people borrow more. When people borrow more they have more cash to spend, therefore the amount of things people buy depends on the interest rate. Thats the IS part. As interest rates decreases, output increases in the goods market. It slopes downwar... |
- why do US voters have a say in the candidate for president but no say in who is chosen as their Vice Presidential running mate? | In the early days of the republic, whoever came in second in the electoral college became vice president. This wasn't ideal, as it resulted in political rivals being in those two spots and prevented them from working closely together. As a result, it was decided that the electors would vote separately for president and... |
Why are some words pluralized with an "i"? | Those are words of Latin origin of male gender ending in -us. The ~~declination~~ declension of those words demands an -i in the plural. See [here] for a full list of all forms of the second ~~declination~~ declension in LatinThey are words that came into English from other languages. Here are some common examples: | S... |
how does gaslighting work? | Rather dark personal example-Had a girlfriend convince me I was abusive at one point in time & used it as justification for her being psychotic, ALWAYS pissed at me with a hair trigger, telling me she hated me more than anything else, hated my style, hated my hair, my friends, and basically forced me to be what she wan... |
do people with strokes become limited or can they just not talk? | A stroke is damage to the brain and it can affect any part of the brain, or multiple parts of the brain. This can disrupt or eliminate motor function, language, cognitive ability, memory, language, sight, hearing, taste, smell, or many other things.A stroke can damage any part of the brain and impair whatever function ... |
Where did "Have your cake and eat it too" come from? Why wouldn't you eat the cake you have? | > Why wouldn't you eat the cake you have? The phrase means "you can't have it both ways". If you have some cake, you *can* eat it - but then you don't have it anymore. If you want to still have it, then you can't eat it. You can have your cake. Or you can eat it. But not both. There're some more details in [the Wikiped... |
From an evolutionary stance, why are humans bereft of basic defenses:claws, canines, thick hide..And instead runs with diverse body types, no fur, and exposed vital organs? | A common misconception about evolution is that it should "improve things". In reality, though, it doesn't care where our organs are, or what defences we have. It simply favours animals that *learn to survive*. We have evolved from an ancestor of the Great Apes, for which this body structure was well-suited. Humans have... |
what do vacuum tubes do | Most either act as an amplifier, using a small voltage to control the flow of larger current, or as a rectifier, allowing current flow only in one direction. It's the same thing transistors and diodes do now.[Is google broken again?] Short answer: They were transistors before transistors existed. |
Why do schools measure ability based on a student's average grade instead of a student's median grade? | What if a student wasn't that strong in a specific aspect of their subject. Say there were 5 tests in a physics class. Kinematics, thermodynamics, Astronomy, Relativity, and Electricity. If the kid got 100, 99, 98, 60, 20 on his test scores, his grade would reflect a 98, indicating he was doing very well in the class w... |
Why do NFL teams have a draft and not just buy whatever players like they want like in soccer? | Because they want to avoid a situation where the team with the most money always wins the championship. There is a scene in the NFL that all teams should be equal, so steps are taken to level the scales. Part of that is that there's a salary cap in the NFL . In addition the draft allows them to essentially give the bes... |
Why is encryption illegal in certain countries? | Good encryption is effectively uncrackable today, which means that any and all data that is encrypted can not be decrypted by the government. Governments don't like that, as it could help you commit crimes or undermine the government without their knowledge. Since they can't beat the encryption, they just make encrypti... |
Why do so many articles of women's clothing require that you lay them flat to dry when similar articles of men's clothing do not? | Doubt that they're the same. Spandex, something found in a lot of women's clothes, cannot be put in the dryer. It stretches and deforms the elastic quality. There's only about 3-5% in most pieces, but its there. Wool, cashmere, other things like that, will shrink in the dryer. |
Why does radiation cause mutation, such as the recent daisies in Fukushima? | So there's 2 types of radiation: ionizing and non-ionizing radiation. Ionizing radiation is the dangerous stuff that causes these weird mutations. What happens is that an energetic particle whizzes through the air and hits the flower. Now these particles are small enough that sometimes they hit the flower's DNA. And wh... |
When are those little interviews in every competitive show recorded? | Welcome to the illusion of television. Do not ask how the sausage is made. Pay no attention to the man behind the curtain. I once was a crowd extra for a football game taping for a once-popular show called Friday Night Lights. You may be interested to know: 1. The shots are all done on one-quarter of the field, with th... |
. What is actually happening to the surface of your tongue and tastebuds when you lightly burn it with scaldinf liquid.. Like hot tea or cocoa? | Cells on your tongue died. Takes a day or so to heal, depending on how bad you burnt it. Burn it bad enough and they don't come back. But your mouth is capable of handling pretty extreme temperatures and recovering, more so than your skin. Don't quote me on the last part, been awhile since I took anatomy. |
What/Who determines what becomes a hit song on the radio? | [Payola] Managements groups determine which songs should be strategically promoted to best influence the consumption of an album, and funnel payments into radio stations to influence what those stations play. |
Why do fan blades appear to spin in the opposite direction at a certain speed? | It only works in artificial light. Alternating current makes light bulbs flicker - they blink on and off about 60 times per second. Too fast for our eyes to really be able to detect. But if you have a fan spinning at the right speed, 60 RPM divided by the number of blades, it will look like the fan is not moving at all... |
Cumulative Distribution Function... please! | Let's take a specific case: how long does a person like you live? If you had a cumulative distribution function, you would plug in a number of years , and get back the probability that a person like you will live at most 49 years. ", 'It would help if you posted a clearer question, but for a random variable X, the CDF ... |
Why do many jet streams and oceanic currents go west-to-east? | It is caused by The Coriolis effect. As the earth rotates it tries to pull the air and water with it but their inertia wants to keep them in place. This creates a spinning effect on the atmosphere and oceans as the air and water closer to the surface is pulled faster than in the higher altitude. It's spins west to east... |
In the skydiving meteorite video, why is the meteor falling like it was dropped from a plane? Wouldn't it be moving very fast and be very hot? | It sure would! But as it rubs against the atmosphere making it hot, it is also slowing down. Eventually it slows down enough that the friction is no longer heating it up to the point that it glows in visible light. Think of it like you jumping into the deep end of the pool, at first you sink very fast, but the water sl... |
Why does my son's stutter go away when he talks in an accent? | It's the same reason that James Earl Jones doesn't have one. Singing, and well . . . accents. They both use the same part of the brain, that regulates speech patterns and rhythm. Because he isn't using the part of the brain that natural wants to be used while speaking, he sort of "bypasses" the stutter. And allows him ... |
What is proper gym etiquette? | First and foremost. Clean the fucking machine after you're done. There is nothing more disgusting than some lunks ball sweat all over a bench because he was too big of a douche to clean it. |
How did the light bulb become an international sign of someone having an idea? | light has always been associated with knowledge. the light-bulb switching on is no doubt a representation of the sudden occurrence of an idea, that 'eureka!' moment in which something is illuminated |
How do people find out about complex or hidden game easter eggs? Do players stumble on them naturally, or do they get leaked? | Any and all of the above. Some Easter eggs are run into accidentally. Some are leaked by the devs for fun to capture the community for karma points. Others are found by users digging around in the binary code or other assets in the programIf it is a new IP, it is usually just an accident or a semi-educated guess relate... |
How does the GDP work and how is it calculated? | GDP is calculated as Consumption plus investment plus all government spending plus the trade balance This is abbreviated GDP = C + I + G + EX - IM All of this over a year's time. The government collects the data by sending out surveys to the appropriate sample size of US citizens. It is quite complicated when it comes ... |
Why can I get an auto loan for 1.69%, but there doesn't seem to be a way to reduce the interest on my student loans? | Two reasons: * For your auto loan there is collateral - if you don't pay them back, they'll take back the car, sell it, and make back their money. For your degree there is no collateral - if you don't pay them back, they can't take back your degree, then sell it to someone else. * 1.69% must be a rate from a car dealer... |
Why did Teachers in the past focused so much on Cursive? | People don't really understand how deeply cursive was ingrained in the culture. Writing cursive was a fundamental part of basic literacy. It wasn't a weird fancy form of writing, it *was* writing. Print was only used in books, newspapers, and some signs , which is why it is called "print". When you had a pen and were t... |
1960s vs 2010s houses, what's the difference? | I own a house built in 1964. Everything in a house has a normal life span. A roof lasts 15 years, a furnace 10, etc. A lot of the house will have been replaced with more modern stuff. Big things you get with a new home: - Things aren't about to wear out. The cycle of replacing everything in the house won't start for ye... |
Why aren't pyramid schemes sustainable? Why are they illegal? | Because somewhen you run out of people ', "Eventually they always collapse because sooner or later there are not enough new people willing to join the scheme to support everyone above them. It's just a math function - if you double the number of participants with each level, you **will** eventually run out of humans. .... |
Why do people sometimes expand emails when typed. | It's intended to prevent their email address from being picked up by bots looking for email addresses to spam. If a poorly written program is looking for "X@Y.com" it won't recognize "X [at] Y [dot] com" and they'll get less spam.It's just a trick to evade spambots. When Spamming became a thing, spammers realized that ... |
Why do stove tops (and other cooking equipment) have numbers 1-6 rather than temperatures? | Stoves heat a pan which in turn heats the pans contents. Even if you know the temperature of the heating element you don't necessarily know the temperature of the item you're cooking. Ambient temperature and the component of your pan will affect heat transfer. It also doesn't matter much for most foods. "Hot" and "real... |
How the US justice system handle rape accusations? | Well it depends. If you are a politician, then the accuser has their life turned upside down and is often accused of being a slut . Or if you are a beloved famous personality then you are simply ignored unless enough people complain that it can reach a "news media critical mass" and start to stick. If you are a college... |
Why does it normally hail shortly after really hot weather? | Hail is created by strong updrafts. Updrafts are created by hot weather . Its really cold at the altitude that clouds are at. When precipitation falls, it starts frozen, then melts as it drops into warmer air. This gives us rain. If there is a strong updraft, the falling ice gets blown back up into the clouds before it... |
Why does aluminum foil cool off so fast when you take it out of the oven? | Aluminium is an excellent conductor of heat and the foil is thin, so there is little actual material versus a cookie sheet or baking pan for comparison. When removed from the heat source it dissapates the limited heat very quicklyAluminum in general has a great ability to reject heat. Also, being foil it has a lot of s... |
If cable companies like Xfinity (Comcast), and Time Warner are afraid of Google Fiber; why aren't they trying to use Fiber themselves? | They would have to replace their coax infrastructure to use Fiber. Now to be fair their DOCSIS 3.1 supports a theoretical 10Gb/s downstream and 1Gb/s upstream so the potential to compete with Fiber exists but they also know that Google does not have the money to bring Google Fiber to a majority of America all at once s... |
Why can you see sunlight only so far underneath the oceans surface? | The light is scattered and absorbed as it passes through the water. As it descends, there is less available for your eyes to pick upbecause the water filters out the sunlight, like the air except since it is 300ish times more dense it is filtered out much more quickly |
Why cant we just draw blood to reduce blood pressure? | Just over half of your blood is made up of [plasma], which is the fluid part. If you lose blood through injury or donation, your body will have most of the plasma replaced within 48 hours. So for this method to work, you first would need to bleed out every other day or so. The other problem is that your body has method... |
How do fingernails grow longer while being attached to the skin underneath? | The nail itself can grow because it is not connected to the skin beneath it. You can get a nail cut almost all the way back without any blood at all, but your finger will be sensitive. |
Why is there no cure against the common cold ? | Quote by [u/APRSNerd] from a [different post]: > A lot of diseases mutate very quickly - the flu and colds are great examples of this. They try to guess which flu strains will be common each year, and produce vaccines for those strains, but they are wrong sometimes. The "common" cold changes so fast that they don't eve... |
The password system in Metroid (NES) | 24 characters is *a lot*. Given that each character can be one of 64 options, there are 64^24 different passwords, or 2^. This means that you can encode 144 bits of data in a single password. Most of the options you mentioned are binary options, so you only need 1 bit to represent each of them. [This gamefaqs guide] ex... |
When I uninstall something on my computer, why do I often need to restart my computer? | This is generally required with applications and processes that work with whatever you install/uninstall. A lot of software that works in tandem with other software only checks to see if you have or don't have what you need when it starts. So instead of manually stopping all processes that might be reliant on whatever ... |
Why do dogs seem to be able to nod off whenever they are comfortable? | We also don't have as sensitive senses as dogs do, so we can't wake ourselves up at the slightest sound, touch, smell, change in light or taste. You'll notice that while the dog nods off easily, he'll be awoken by certain things that won't wake us up. Not to mention that they sleep when the need/can, whereas humans usu... |
What is the cause of the word 'cello' being pronounced 'chello'? | This is because it comes from the Italian word violoncello. Basically, the main cause of this is because it's derived from Italian in which the letter \'C\' followed by the letter \'E\' is pronounced "che". This is similar with \'C\' followed by \'I\' (e.g. the word for \'Chinese\' is \'Cinese\' but is pronounced with ... |
Why are we not exploring the universe equally in every direction? | Those dark spots probably correspond to the parts of the universe which are occluded by the bulk of the disk of our galaxy. As we look in that direction, we can't really see past all the gas and dust that comprises the main disk of the milky way.That image is very misleading. We haven't "explored" hardly any of the uni... |
Why are females generally weaker than men? | Biologically, one male can mate with a lot of females at the same time. If you put a group of females together, the males will fight over them. When males fight, often the strongest male wins. The strongest male gets to mate with the most females, and produces the most offspring, which are themselves likely to be stron... |
Why are we told leave a pool during a thunder storm if the pool is grounded? | Yes, the pool is grounded, so lightning will pass through it into the ground. You are mostly water. If you are in the water, some of those 1.21 Gigawatts are going to pass through you was well. |
How high and how low do a nations borders go? | National borders are usually understood to travel all the way to the center of the Earth below. Above they extend to the border of the atmosphere with space which is typically defined as 100km in elevationYou may be interested to know that international law on the equitable division of potentially shared underground wa... |
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