query stringlengths 8 249 | answer stringlengths 45 7.8k |
|---|---|
Why couldn't a perpetual motion machine based around magnets work? | Magnets require an equal force to pull away from an attractive object as they do to draw it close. Magnets also wear out so it cannot technically be deemed 'perpetual' just the same way that any other moving machine that uses a degrading material to function cannot be.Because you can't gain something from nothing. Let ... |
Why fish isn't concidered as a meat. | Not all of them do. IIRC, it's from the belief that fish aren't as developed as mammals or birds and aren't capible of suffering much from being farmed. OR because fish is so much better for you than cow/pork.Vegetarians do not eat fish. That is a Pescatarian. But as to what is or is not considered meat, it depends on ... |
Why do graphics in older movies look so shoddy years later, when there was a point the graphics seemed realistic? | They never looked realistic. They just looked the best anyone had seen at the time, and people were willing to suspend their belief for the sake of it. It's just like how 8 bit games at the time were thought to be amazing, but compared to AAA titles today like Skyrim or whatever, they look trash. |
How are herbivorous animals, for example cows, able to grow so big eating only grass? | Three things: First, grass has zero calories *for humans*. Our digestive systems evolved for fruit, nuts, insects, and occasionally meat. All of those things are fairly easy to digest. Plant matter, especially tough grass, has a lot of cellulose in it. Cellulose is just a *very* long chain of sugars, so if you can brea... |
why, at airport security screenings, do electronics need to be put in a separate tray? Can't scanners see through a bag/luggage? | Security theater. It doesn't make it any easier to spot a bomb, but it makes people feel like something is being done. Since the explosion of TSA regulation following 9/11, more terrorist attacks have been stopped on the plane than in the airport, because vigilant civilians see something off. The logic of making you re... |
If you draw on a foggy mirror or window, why does the image appear again the next time that it fogs up? | Your skin is leaving oils on the mirror. The condensation interacts differently with the oil layer than with the glass. Since the coating is thin and transparent, it's not especially obvious in circumstances without condensation. |
Why do Hard Drives need to be defragmented? | These days, they don't, really. Modern filesystems like EXTFS, XFS, HFS+ don't need to be defragmented except in extreme cases, because they will avoid file fragmentation in the first place and intelligently re-place files as needed. NTFS can go without defragmentation for a decent length of time but will eventually be... |
Why can some animals like horses learn to walk immediately after birth but for babies it takes up to a year or more for them to walk? | In addition to what everyone else said, horses can't carry their babies. Note that cats, dogs, apes etc. take longer to learn to walk than horses do. |
What is the principle of least action? | On first glance, it looks like if something can go wrong it will go wrong is fought by the idea that it takes more actions, therefore more effort, for something to go wrong. In other words, more steps. Just how I interpret it. Someone who paid to study this will give you a better answer. Or won't. We'll see which law o... |
How can credit card companies afford to give away so many travel points? | Easy.. Every time you use that card the business that takes it is charged a % of every sale. That money then goes back to rewarding customers at a LOSS to the customer. After all, the card company is in it to make money for themselves. Suppose you buy $100 worth of stuff at store X. If you use your credit card they cha... |
How does water spontaneously evaporate? | The state of matter is essentially the arrangement of molecules. If the molecules are close together, it's solid, if they're further apart, its liquid. If they're even further apart its gas. These molecules keep colliding with each other. So you've got water and air molecules that just keep bumping into each other all ... |
Why aren't all humans ambidextrous? | it's important to understand that things have a biological cost. venom is the typical example. a venomous snake has to build and maintain a system that constructs highly specialized chemical compounds, and then also the systems that keep those compounds from killing it. your body spends a lot of resources on having fin... |
The existence of sovereign nations with-in the USA. | Whether or not a nation is sovereign is primarily dependent on whether other nations recognize them as sovereign. A big reason why the natives of north America never stood a chance is there were over 500 different tribes. If they had banded together they would have stood a chance but they fought each other almost as mu... |
why/how does cold or rainy weather affect bad joints? | Seeing as pressure has already been addressed, I'll say something about the cold. Since cold causes your surface blood vessels to constrict and your knee joint for example is very close the surface of your skin, cooling it down reduces blood and fluid flow in/around it. This means that when the joint is still, the lubr... |
Why dont babies rip out their umbilical cords in the womb? | Some animals, like sharks are born ready to go. As soon as a shark is born, it's a fully formed shark. Meanwhile, humans are born half baked. Their muscles are too weak to exert significant force, and their brains aren't well developed enough to know how to coordinate their muscles. Plus, umbilical cord tissue is tough... |
Are bodyguards really expected to take a bullet for their client? | I'm military, known a few guys in close protection. Some of these guys do actually wanna be heroes. Like, they would think it'd be epic to be that guy to save someone. A lot of them think they are kinda invincible so there's that too. They are trained to put themselves between client and threat, and in a lot of stressf... |
Why is the Arctic melting so much faster than the Antarctic? | Antarctica is actual land with snow and ice on top, whereas the Arctic is just ice. I think that answers the question? I'm not sure. |
Why should I let my car run in cold weather? | If you were being chased by a chainsaw wielding maniac, hopped in your car and gunned the engine cold, you'd get away just fine. Nothing will explode. By and large modern engines with modern fluids can handle it. Doing it everyday however will significantly shorten the life of your engine. Your car has all sorts of flu... |
What does it mean to invest in distressed loans? | Hopefully someone will correct me if I'm wrong but let's say I asked a bank for a loan that I can not pay now. Someone can buy the rights of that loan for less than the entire value. So if he/she can make me pay the entire loan the will have a profit of they can not they will lose money. |
Is there a good, logical, or historical reason why some password setup fields severely limit the field length or disallow particular characters? | Oftentimes it's because the pretty website that you're using has to interact with some ancient mainframe system on the backend. The code was originally written in the 1980's and can't be overhauled without breaking everything. Back then memory space was a serious concern and storing more than 8 characters would actuall... |
why does chapstick make my lips feel more chapped and cracked than they were before I used any? | . there are basically two parts to skin moisture, water in the skin, and a layer of oils or waxes on top to help protect and keep it there. lotion usually has both, part of why it's so weird. chapstick is heavy on the oils and waxes without much moisture, which if your lips are already dry and low on moisture means a w... |
Why does perpetual machine never works? | The way science works is that we watch the universe and then write rules for how we think it behaves. The way we see the universe working is not consistent with perpetual motion machines existing. Physists will tell you that it breaks certain laws. Its basically like saying that gravity pulls things down because thats ... |
If friction causes heat, why does moving air create a cooling sensation against skin? | Two reasons. First, it moves heat generated by your body away faster, creating a cooling effect. And second, the air is cooler than your body so it actually is helping your skin cool. On the second point, hot air blowing against your skin, like a hair dryer, does not feel cool. But no matter the temperature of the air,... |
Why does pushing down on a sharp blade not cut you, but a slicing motion does? | Also depends on the knife. I wouldn't trust this notion that you're safe to stop a blade of a well sharpened knife |
Was the nuking of Japan in WWII a war crime? | No. There were only a few international treaties regulating warfare in 1945, and those contained only a small number of protections for civilians. None prohibited the targeting of civilian population centers. What's more, because Japan refused to ratify those treaties, the US was not bound by them, in accordance with t... |
How does phone memory actually work? | Your filesystem loses you a bit, on top of manufacturers using 1000s instead of 1024s for GBs So that puts you a few short Your apps and files take up some, Then there's hidden files and folders your device manager wouldn't likely have access to for cache, thumbnails, temp files, etc. It works the same as storage for a... |
Why can you sense people staring at you? | As well as the wide visual field, people's breathing sounds differently when they are looking at you than when they are looking away. Try it one day in a silent room with someone else, turn your head to them when they are not looking and it's likely they might sense something, or when they turn to you, you can notice. ... |
Why we find nature much more beautiful than manmade objects | I don't think there could be an exact ELI5 for this. Maybe I'm wrong. Everyone's interpretation of beauty is different. But the fact that nature isn't as clinical as man made objects, not filled with straight lines and perfect edges. The fact that nature is living and breathing and provides life. Maybe that has some be... |
How do soccer channels add those editing effects on players and on the ball so fast (between the halves) ? Isn't it a complicated process that takes time and rendering? | It's a rendering software that places everything over it like a greenscreen. The tech itself was made by a small team, and after a bunch of tries, they got a job doing it for the NHL by highlighting the puck on the screen, but it faced numerous issues. They later got picked up to do it for the NFL, which is where it be... |
Is there anything the US government can do about companies moving their wealth offshore to avoid taxes? | Of course there are things the US government could do. A first step would be concluding multilateral agreements with other OECD countries. The OECD is an organisation of industrialized countries that facilitates economic cooperation. Another platform would be the G7 or G20 . What are the obstacles?1. Lobbying: big corp... |
How it would be cheaper for socialized Medicare in america vs paying for health insurance. | It would be cheaper because there would not need to be any profit. A private business, no matter the industry, must turn a certain amount of profit every year in addition to compensating for their costs. If the government were to directly fund the hospitals instead of paying off insurance companies, the hospital would ... |
Why do companies need to make more every year? | Hopefully a company is making a profit from its efforts which it can either distribute as dividends or reinvest in itself. Often the idea of reinvestment is desirable both for tax reasons and because doing otherwise would imply the company isn't a good investment. |
how zipping a file can reduce its size. | Kinda like vacuum sealing food or clothing. It's compressing data or squishing it. Lossless compression removes redundant stuff. So aaaaaaaaaabbbbb would become a10b5 Lossy compression means reducing quality so imagine a .png file becoming a .gif, you're actually losing data here", 'Zipping compresses files by removing... |
If education is so important for kids, why do teachers--especially charter ones--have crappy pay and salary caps? | Limited resources, whether tax revenue or tuition funds. Residents are only willing to see their property taxes go so high, and school tuition can only be a certain level before nobody can afford it. Teachers can make high salaries in certain districts with the funds to do so . It's also important to factor in things l... |
How can something as small as a buggy website/script cause the rest of the computer to totally freeze? | Imagine that you have a classroom full of children. You want them to do some coloring, so you put some pencils on a table in the middle.As long as everyone behaves, everything goes smoothly, each child will only take a few at a time, and put back what they don't need. If one of them starts to hoard the pencils, the oth... |
How do planes just go missing in todays high tech world? | In large part, through crashing into the ocean and sinking. The ocean is very big, and can be quite deep. This can make it difficult to find wreckage, and can be a barrier to both visual inspection and signals you might use to locate the craft. Even if you know exactly where it contacted the surface , its unlikely to h... |
How does water pressure affect you when you're INSIDE a Submarine? | It doesnt. The internal air pressure is the only thing affecting you while in a sub. They usually keep it about what it is on surface, but there will be slight pressure changes as you go up and down |
Does all light work for photosynthesis? | Yes pretty much all visible light can be used for photosynthesis although specific wavelengths are more efficient for the plant and some plant can better take advantage of wavelengths that others cant use as much due to accessory pigments and other structures. Some algae are even able to use near IR light for photosynt... |
What happens to a mutual fund from market open to close? | Securities are bought and sold during the market day due to the fund's strategy, cash flows in or out of the fund, and for other reasons. At the end of the day, the fund accountant adds up all the ending market values of the securities held at close minus expenses etc and strikes the Net Asset Value of the fund. If you... |
How do Olympic athletes make money? | Someone from my high school made it onto an olympic team and had to turn to GoFundMe. A lot of them may have day jobs. Coaching obviously but for winter sports you might have a lot of people working at the ski resort working on their athletic skills in their off time. It can become its own mini economic sytsem in some ... |
How do states like Texas, Florida and Nevada have no state income taxes and survive ? | Texas is actually prohibited by their state constitution to have personal income tax -- but don't worry, they simply increase the sales tax and property tax to compensate! Florida has a high sales tax and property tax as well. Personal income taxes were eliminated there long ago , but like Texas, the other taxes make u... |
The difference between 66 and 72 degrees outside isn't entirely noticeable, but the difference between these temperatures inside during winter seem gigantic. Why is this? | The perception of difference is due in no small part to the relative humidity. During the summer month's, the air holds more water. The higher the relative humidity, the lower your perception of the temperature variance. If you were to go to an arid climate in summer, the difference between 66 and 72 would be noticeabl... |
why does stormy weather affect power/internet for only a couple of moments instead of completely cutting it? | The breakers at a substation have a 15 second reset that will turn it back on ~3 times depending on the manufacturer. This is so if a branch, animal, ext. Hit the lines and short them out but don't damage them power can go back on quickly with out any human interaction.To add to the other two posts, even if a a permane... |
Why do kids hate naps while adults seem to love them? | I'm an adult, and I think I'd hate it if someone kept telling me I *have to* take a nap, *right now*, every day. |
What actually is the sine, cosine, and tangent of a triangle? | Definitions aside, I find it more interesting to think of sine and cosine in terms of circles than triangles. Say you have a circle of radius 1 centered at 0,0. Choose some point on that circle. What are the x, y coordinates of that point? Draw a line between the center and your point. It makes an angle with the positi... |
Difference between a container and a Virtual machine | If a machine is like a car. then a virtual server is like a car carrier with 8 cars on it and the cars are the virtual machines because although they appear to be driving along the road its the truck that's doing the driving. Containers are more like a train with separate compartments they are all in the same vehicle p... |
My drain cleaner says "Drink water if swallowed. DO NOT induce vomiting" | I would imagine that vomiting it up could cause damage to the oesophagus. To my knowledge drain cleaner is usually basic so it will react with the acid in your stomach to decrease the pH it a bit. If it's an acidic drain cleaner, your stomach already holds acid. So the best thing to do is to just dilute the acid by dri... |
Why does Martin Luther King Jr get all the glory and Malcolm X gets left in the dust? | I don't know the answer to your question, but I'm also kind of amazed that Malcom isn't embraced and studied more. There are so many aspects of his life, his yearning, and his evolution that are tragic > laudable. He is an Everyman. He should be the patron saint of all who are shit on, hate the world for it, then learn... |
Why is it more likely that one partner's bad habits will rub off onto the other rather than the partner with good habits rubbing off onto the other? | It's not true actually. Generally the habit of the dominant one stays. The dominance maybe subtle but it effects the lifestyle. It can also happen that one partner's dominance is seen in few lifestyles while the other dominates in other areas of life. |
Why does Earth hardly ever get hit by meteors? | Because most of the matter of the solar system has coalesced into the Sun and its planets. If you take a look at the timeline of the solar system, all started around 4.6 billion years ago when a huge molecular dust cloud collapsed into itself and a star, the Sun, formed in its center . The planets formed very soon afte... |
Why are Congressional officials paid during shutdowns, but not blue collar government workers? | Different sections of the government are funded with different bills. Congress and the defense department are all funded now. That's why it's qualified as a partial government shutdown Edit: courts aren't funded now |
Why does aspect ratio affect whether a letter is machinable by USPS? | They have all sorts of automatic sorting machines that use belts to move envelopes, and those belts sorta shoot the envelopes out, so if they're long and skinny they fly through the air nicely without flipping around, but if it's like a square it will want to flip and won't be properly sorted. It's this sort of thing: ... |
Why won’t Instagram change back to chronological order for posts when its users have been overwhelmingly clear it’s what they want? | It's not what advertisers want. They pay the money, so they get what they want. If ads couldn't displace the content you want, you could visit once a week without missing anything. That would be **very bad for ad views**, so it's bad for the company.Everything everyone else is saying, plus it is MUCH easier to "hide" p... |
How does someone die instantly from a bullet wound? | Temporary cavitation, as IsthatTacoPie describes, is highly debated in as far as its ability to kill. Internal organs tend to be very stretchy and pliable and most of them survive temporary cavitation with just bruising. The fragmentation of the lungs and larger exit wounds than entry wounds are usually caused by bone ... |
What is g force and how does it kill a person if there's too much? Is there really negative g force too? | Gs is just a way of measuring an acceleration in terms of the weight/g force of earth. Hence 1g is an acceleration equal to that caused by the force of gravity, 2g is double that and so on. Negative g-force is basically just an acceleration in the opposite direction in your frame of reference, so it's not really someth... |
Home Owners Associations. What? Why? Why all the horror stories? | Ours hasn't been bad at all. Always swore I'd never live in one but we really loved the house and neighborhood. We pay around $400 a year, have access to two pools, 3 parks, 3 stocked fishing ponds, and they maintain all the medians etc etc. Haven't had a run in with them yet and haven't heard much complaining from the... |
If a star in its red giant phase absorbed a star similar to our sun would it refuel the red giant and make it go back into its main sequence stage? | Probably multiple scenarios here depending on all the different factors. What phase of the lifecycle is each star, what angle/speed is the approach of the two stars, what are the differences in mass, etc. & #x200B; My guess is that the more dense star will stay more intact as they approach while the lower density red g... |
Why can’t humans see all wavelengths, and what causes them to be harmful? | Probably most importantly, the sun emits a lot of visible light, and our atmosphere is mostly transparent to it. So it's around to make use of, instead of blocked in space or lacking in quantity. And solid objects are mostly *not* transparent to it, so it lets you discern objects, whereas something like x-rays, if they... |
What is the difference in Propaganda and Fake News | There isn't a hard line between the two notions. However, propaganda is normally construed to be centrally directed to sell a narrative. Pravda was propaganda because it was the official mouthpiece of the Soviet Communist Party - all of its 'news' stories were written primarily with an eye towards presenting the party ... |
How do government shut downs hurt the economy and who are the ones who lose their money? | The primary way it hurts the economy is the fact that 800,000 people aren't getting paid. That's 800,000 paychecks that aren't getting spent. People are buying less because they don't know when they'll get paid next. This has ripple effects on the entire economy. |
Is there a reason to why our body temperature is 37°C? | The hotter you run, the more energy you expend, but at the same time, the hotter you run, the less effective microorganisms are at killing you . As far as I know, 37C is just around the sweet spot where a lot of common infections are prevented while still conserving as much energy as possible.The human body houses many... |
how does dyslexia work? are you dyslexic in all languages? | People with dyslexia tend to find letters similar, like d and b, p and q, I and l. So, it doesn't matter which language is written, dyslexia will still kick in when reading a text. Comic Sans, a universally hated font, proven to be easier to understand by dyslexic people, as their letters are fairly different from one ... |
what is the noise you hear when squeezing your eyes closed as tight as you can? | This is an ear thing isn't it? Closing just your eyes doesn't make a noise! Not for me at least. There's a sub all about this. Some people can do it, some can't.Vibration of muscles around your eyes causes vibrations of your skull which vibrates your auditory systemI have litterally never hear a noise doing this wtf?? ... |
what does the bag that doesn’t inflate on airplane oxygen masks actually do? | It's just an additional reservoir for air. You should be able to inflate by pressing on the one way valve you would normally breathe from |
How can the weather forcast be wildly different depending on which provider you check it with? | There are a number of competing forecast models. Different models will give different results. Some models are more accurate than others. In the US, most weather data comes from the National Weather Service. This data is free to access, although it can be used by a service and sold to consumers - this is what AccuWeath... |
how come older video games have fewer glitches | If you watch speedrunners of older games, you'll learn very quickly that older games have just as many glitches. & #x200B; We just didn't have the internet at the time to hash them out as quickly. If you look at Mario Bros speedrun, they us a good number of glitches. And a lot of speedruns need a glitchless category be... |
Why can low budget media sites detect and require you to turn off adblockers, but YouTube cannot? | Youtube can but ad blockers will develop a bypass and youtube will patch the bypass but ad blockers will develop a bypass ect. If there's a large enough demand for an adblock developer to fight a website then they will. |
How does an astrophysicists day look? does a "boss" give them work for the day? the month? Do they have free reign on what they work on? | I'm an astronomer. Mostly we only do our own stuff. We have meetings to discuss what we are doing, discuss the science behind it and give each other tips. Sometimes the boss comes and says stuff like, we should really look into this, or we need a poster for the next big meeting, stuff like that. Then we also have teach... |
the difference between a computer's BIOS and Hardware Abstraction Layer. | BIOS is the lowest level software that's pre installed on the motherboard. The BIOS checks that all the hardware is dandy and then boots up the OS. At this point the OS takes control of the hardware. Different hardware use different instructions in order to directly control devices in the computer. Because OS's need to... |
How do 2D animators keep characters and elements consistent? | > animators - who have to draw thousands of versions That's half your answer, practice. The other half is best practices like reference images, or simply as a result of key framing. |
How exactly does water get "stale" and why does this process occur only at room temperature? | > After about 12 hours tap water starts to go flat as carbon dioxide in the air starts to mix with the water in the glass, lowering its pH and giving it an off taste. But it’s most-likely safe to drink. [source] the article goes on to say, that the glass could have germs on it. especially if it was touched by dirty han... |
Why do computers, phones, laptops etc. get slower as they get older? | That's probably something as simple as you have too many apps installed. I have a Note 4 which was a phone that was announced Q3 2014, so now Q1 2019 it's well on the way to being 5 years old. I've found before it's started to run like crap, slow to respond, crashing, all that kinda thing, and I find if I just go throu... |
Why are most chess champions young? Or if not why does it seem that way | Unless you're into competition chess, you're not going to hear about the 54 year old chess champion, because we expect chess champions to be 54. It only hits the mainstream when a young player wins. |
What is MLM and why is it bad? | It's bad because instead of selling your product to people who want it, you're selling your products to someone for them to sell your products to someone for them to sell your products to someone for them to sell your products to someone that wants them. That's a *lot* of layers of people in the middle who do nothing e... |
Why are Americans allowed to pay bail to get out of jail? | Because when you're in jail you can't work to pay your bills or perform your day-to-day duties. Unless you have someone who can effectively handle your entire life for you, you might lose everything you own and have your entire life ruined, even if you are innocent of the crime that you were accused of. Also because mo... |
Why is there tax on second-hand items at thrift stores? The gov’t has already collected tax on the item the first time | Sales tax is charged on all goods sold by a licensed store regardless of who made it or whatever. It's a town/city thing, not a store thing. |
How did early explorers map out the shape of countries so accurately? One specific example would be Matthew Flinders with Australia. | Surveying has been around for a very long time. All you really need is an accurate measuring tape, and a device called a transit. Basically, a transit is a scope on a base that you can rotate, and it accurately tells you how far off of north the object you're looking at is. Basically you just go out with a rod and a ch... |
Why are some prisoners sentenced to several life sentences or an unreasonable amount of years in prison? | Each crime carries it's own conviction. So if someone commits murder while robbing a store, they may get 10 yrs for robbery, 10 yrs for murder, and the court says they were sentenced to 20 years. Depending on behavior, they can serve the sentences concurrently, meaning they would be out in 10 years, not 20. |
why is 3G and lesser cellular reception often completely unusable, when it used to be a perfectly functional signal strength for using data? | To oversimplify it, when 3G was the pinnacle of cellular data transfer most of the network resources went into making it work to ensure it was the best available. Now it isn't the pinnacle and the new king, 4G, now gets the majority of resources and 3G is just sort of maintained as a lip service to outdated devices tha... |
Statistical Significance vs Effect Size | Statistical significance: is this coin fair? How sure are you that this coin is fair? Very sure? Only very slight hint and thus needs more data? Effect size: how unfair is this coin? Is it head 100% of the time? Only 50.1% towards head? Significant with small effect: after testing 1 trillion flip, we are very sure that... |
why is it that when disarming a bomb, that you dont just cut all the wires at once? | because people can build bombs which go boom if you cut all the wires or even if you move it after it has been armed.there has been an example of a bomb which couldn't be defused by any means and couldn't be moved without being the builder and knowing exactly what to do due to loads of traps and confusion material_URL_... |
How does radiation both cause and kill cancer? | This is going to be a terrible analogy so bear with me If you hit someone over the head with a baseball bat, you might kill them or you might just cause brain damage. Radiation damages the cells DNA. In most cells this will simply kill them, but for some this damage can result in a mutation that causes uncontrolled gro... |
Why do your fingers get al raisin-y when wet? And why does the rest of your body remain normal? | So there are actually nerves that cause this to happen! If you damage those nerves, your fingers and toes don't prune. Wrinkled fingers grip underwater things better. Wrinkled toes may also give better footing when wading in streams. Definitely not ELI5, but a cool case here: _URL_0_. Kid had a nerve injury and they co... |
the cons of taxing the wealthy more | You need to dramatically simplify tax rules to do it effectively, and ideally render offshoring wealth impossible. Theres some suggestion that higher rates of tax remove incentives to work, and at lower incomes this might be true, but the vast majority of the income of the truly wealthy is unearned, so this doesn't hol... |
Why is there such a huge repeated number of same instruments in orchestras? | Violins in particular produce weaker sound than other instruments in an orchestra. So when every instrument is playing at once, you need more violins than any other instrument to make sure they're loud enough to be heard. This is important because violins are important in the sound of an orchestra. Violins usually get ... |
Why do our bodies not ache after sleeping for several hours vs. when awake in a stilled position for several hours? | As others have noted, your muscles are not relaxed while sitting or standing but they are while sleeping. However, I don't see others mentioning that you aren't lying still all night. If you were to lay still for several hours, you would almost certainly wake up sore and may even develop a DVT blood clot.Cuz your under... |
What are the pros to nuclear energy? Is the storage of waste still a problem? What roadblocks are stopping it from being viable? | Pros are less carbon emissions. Coal is just plain horrible for the environment in every aspect: mining, shipping, burning and waste are all disasterous. Natural gas is hard to recover without damaging the environment. Oil nearly as bad and getting worse all the time as we have to look harder and harder to get it. Stor... |
If employees can legally end an employment contract at anytime by giving 1 months notice, what is the purpose of 2 year and 5 year contracts? | Typically the employer can't end such a contract early without a good reason. That is the purpose of having a contract for a longer time. You know you don't have to look for a new job in a month unless you violate the rules in the contract or there is another reason to end it early. |
How can the rubiks cube be solved with simple algorythms, from any starting point? | I just do cubes for fun, not at all competitively or anything, but the simple answer is that in my memorized sequence, each step moves only one or two cubes into where I need them while leaving all of my previous work alone. So no matter how the initial cube state is, I start with getting cubes 1, 2, 3, and 4 into posi... |
How can data be protected from hdd failure without having to write every single bit in 2 separate places? | There are different levels of raid Some levels give you speed and increased capacity, some give you data redundancy and others give a blend of improved read and/or write speed. With out knowing what type of raid system they are using, we can only guess. You'd have to call them and ask them. At the basic level there's m... |
Why do the signs say not to use a mobile phone at the petrol station, even though everyone does and nothing happens? | A while back there was a myth that a phone could cause a spark between the contacts and cause an explosion. Braniac disproved it. However, since the whole 'exploding Samsung phone' thing has happened, it is plausible for a defective phone to produce sparks and that's not really what you want in an area full of flammabl... |
Why are points and naming in tennis rather weird, it is it counted 0, 15, 40 and not 45, and why 0 is called 'love? | I think it's worth mentioning that no-ad scoring uses numbers and functions well in that regard, but using the standard scoring with no advantage would feel strange. For those that are unaware of no-ad scoring, you never have deuce, so whoever gets 4 points wins the game. 15 = 130 = 240 = 34 = game So when it's tied at... |
How can you explain the concept of Laplace and Fourier Transform using analogies to a kid? | I think 3blue1brown does a fairly good job at this. Some elements aren't 100% ELI5, but most of it is still pretty intuitive. _URL_0_", 'All sounds are made up of smaller units called "pitches". Each "pitch" has a different frequency and sound. If you were to feed a sound/signal into a fourier transform, it would tell ... |
When does a doctor decide to amputate rather than save limbs? | For amputation limbs can be categorised into i)Dead limb ii)Dying limbiii) Deadly limbiv) Damn limb |
Is it a good idea if the UK would leave Northern Ireland. | The people of Northern Ireland don't want to leave the UK. Are you going to deport everyone that wishes to retain their citizenship? |
What is it that draws pigeons specifically to parks and plazas? Why not other birds as often? | Pigeons like large fields and don't mind nesting in cities, that also don't mind eating french fries and such. Many of the birds, or even most, just don't like that type of environment and won't nest near it, you won't find hummingbirds in an open park, they eat nectar and stay near flowers, you won't find goldfinches,... |
Why is the audio mix on movies/TV so much quieter than YouTube/online video? | There are different loudness targets for different mediums. This is so you don't get your eardrums blown out when the next song comes on your Spotify playlist. The targets are measured in units called LUFS . So when you mix for TV in the US, the audio should reach only -24 LUFS . Streaming is -14 LUFS, significantly lo... |
Why is carbonated/seltzer water made with carbon dioxide and not oxygen? | CO2 breaks down in water and forms carbonic acid. It takes quite a bit of CO2 to saturate the water to the point where it cannot hold any more CO2; the same does not happen with oxygen and water. Plants inhale CO2 through their leaves not their roots. It's like asking why can't you just shove a ham and cheese sandwich ... |
Why do all fluids seem to get thicker as they get cold, besides water? | The hotter a liquid is, the more energy is in it. The more energy in the liquid, the more the molecules want to bounce around. So when you turn over cold syrup, the molecules don't want to move. But if they are hotter and have more energy, they are already interested in bouncing around so they are happy to move. Water ... |
how does a video game cd work? | It works like any other CD: the disc spins really, absurdly fast and a laser shines upward onto the surface, reflecting off the microscopic pits that represent the data, and your machine interprets the reflections of those pits and creates whatever's encoded onto the disc. There's an index coded onto the disc that the ... |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.