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does a fully efficient solar panel release any heat energy from the sun? | Efficiency of a solar panel is defined as so yes, if it captured 100% of the energy that hit it then it would stay very cool. It would heat up a little bit from losses due to the current flowing through it but these often aren't accounted for in cell efficiencies and would be orders of magnitude less than losses due to... |
Why/How does the Earth rotate? | The reason the earth rotates is the same reason all other planets rotate in the same direction, and orbit in the same direction! At one point, our entire solar system was a large cloud of space dust that was created from older, larger stars that had exploded. Now, this dust wasn't sitting still, its orbiting the center... |
why do you have to put your phone on airplane mode in flights? | The original fear was that the signals a cell phone emits *might* interfere with the signals the plane uses. I don't think there's ever been a confirmed case of this happening, but better safe than sorry. It also prevents your phone from wasting tons of power trying to look for cell towers", 'From what I understand, th... |
Why Windows still slows down after some time, and it's not fixed even when reinstalled. | Reinstalling windows is a lot like saying somebody is a slow driver. So you switch operators, and realize you are still in a slow car. Computer parts are subject to all the same wear and tear as any other electrical device. Excessive dust, heat, or simply years of service can slow it down, or make it feel less responsi... |
Why can't people with tattoos donate blood? | Because tattoos could be given using a dirty needle. Since there isn't an effective way to guarantee the safety of tattoo machines they will make you wait a certain period of time before you can donate. |
Why do flies "like" us? What do they find interesting in our skin, so much so that they return to rest insistently even after being driven out? | As to returning after being driven out, it is more that their brains don't have any mental capacities like we're assuming. They're all need/stimulus/response. No cognitive processes sophisticated enough to clue them in on the fact that we're dangerous or they're not wanted.Why do love open wounds so much? They flock li... |
If white rice is so lacking in nutritional value, how come it's a staple for over half the human race? | It's just poor/faulty wording. Nutrients are substances used by organisms as energy and material to grow and perform other functions. Rice contains a lot of calories so it's actually very nutritious/nutrient rich in that sense. It provides plenty of energy.It's just not amazing when it comes to vitamins and minerals. D... |
What happens when a drink goes down the "wrong hole" | Our bodies really do NOT want any foreign objects in our lungs. Anything that gets in there can cause a serious case of pneumonia. Normally, when we swallow, the epiglottis, which is basically a little flap, covers the opening to the trachea so that food and drink can only go down the esophagus. Sometimes things don't ... |
Is there a genuine reason why men and women don't compete in the same professional sporting events? What is it? | Men would dominate over women in most of sporting events. For example, the Canadian women's national hockey team usually practices against boy's high school teams, and they often lose. Man's athletic superiority is a combination of larger body mass, a higher level of aggression/competition, and other biological reason.... |
If I pull a plug from an outlet does the electricity instantly disappear, if so why? | Yes. Electricity is the flow of current through a loop. If you break the loop at any point, the current stops and the effect of the electricity may stop. Flipping the switch, popping the breaker, blowing the fuse, or pulling the plug are all interruptions in the circuit. |
Why are personality disorders so difficult to treat? | Because personality is individual and no no two personalities are exactly the same so it's almost impossible to make a drug for each and every personality type. This implies they can only generalize and make drugs for certain parts of the personality that cater to the bigger part of society with issues such as bi-polar... |
Why are real estate prices in the US so high despite numerous housing projects and/or housing without anyone occupying it? | housing isn't particularly interchangeable. people will pay a certain price for a house but might not see a different house in a different place as worth the same amount.Depends on where you are. Newer or reinvested neighborhoods may have high price tags because they want to make sure that they people who fill these ar... |
Why eggs in Europe don't have to be refrigerated while in North America they do. | In North America, eggs are washed, in Europe they aren't. When eggs are first laid they have a much thicker shell, and the washing process removes a lot of it. There's a lot of debate on which method is better. |
Why does chloroform knock you out when you inhale it? | Chloroform is an [inhaled anesthetic]. Like other inhaled anesthetics it appears to [act at two sites]. In the brain, anesthetics decrease blood flow and block synaptic activity, inducing a sleep-like state. In the spinal cord, anesthetics block signals from reaching your brain, so you aren't woken up by pain or other ... |
Why do modern consoles like PS4 make you download the game disc onto the console's HDD? | The games are so big that they are compressed on the discs and aren't playable in that format - its faster to install them to the drive and faster than running it off the optical drive. Plus it makes updates easier to manage. |
How are flies able to survive the large force of a towel hitting them on the wall. They fall down, and end up being only stunned, able to fly away soon after? | Force= Mass x Acceleration - mass is of a fly is minuscule, and acceleration is at it's slow speed of flight. The tiny force is insufficient to compromise its structural strength. Imagine being hit a mattress a couple of your friends threw, you wouldn't die either. |
Can fire be used to clean certain toxins or chemicals in the air? | I'm going to answer this from the point of view from processing and storage of petroleum. In the case of a refinery or an oil storage terminal there is a trade off when it comes to emissions. Gas or vapors from a petroleum product has value to the refiner so this leaves them either trying to capture and condense the va... |
How does an external battery charge a device with more power than itself? | There's is most likely a diode in the phone preventing power from flowing back to the external battery or any other connected power source. |
How does Netflix continue to produce more movies & shows and increase their profit without ad revenue? | The key thing to remember is that the cost to produce a show is a 1-time cost, but the revenue is reoccurring . The goal of Netflix is to get you to subscribe and keep you subscribed. They do that by offering content that you can't get anywhere else, plus a smattering of other content to keep you happy. They realized a... |
Why are liquids over 100ml allowed to be stored in the cabin of a commercial plane but not on overhead luggage? | I always figured the binary explosive thing was a ruse, and that in running scenarios when they were rethinking air security after 9/11 they figured that was safely below the amount of gasoline you'd have to smuggle onboard and spill in the cabin to start a fire that killed everyone. |
Why are some economically powerful nations have such a low currency and vice versa? | The absolute exchange rate of currencies is meaningless. Currencies can be freely redenominated by just changing account balances and prices, so it doesn't matter if one yen exchanges for one dollar or one cent or 1/100 of a cent. What matters is how those exchange rates change over time. A strong currency is likely to... |
How does a home central AC work? Does it use any water? | > I read that legionella bacteria is a concern with big air conditioning units, but only ACs that use a humidifier or cooling tower. The idea here is that if the bacteria are in the water and the water is able to become an aerosol in the air then people will breath in the bacteria and become sick. > Could someone expla... |
How did humanity get this far with only recently having clean, filtered water to drink from ? | Those with weak immune systems would have just died. People used to die all the time from things like that. As time moved on they realised boiling the water helped make it safe although they didn't know why, also people used to drink beer instead of water in Europe because it was safer. But yeah the main answer is that... |
How were Congressional Republicans able to delay and ultimately avoid hearings for Merrick Garland, yet Democrats couldn't do the same for Brett Kavanaugh? | The Republicans had the majority in the Senate and could just not allow hearings on Garland. Being in the minority, there was / is nothing that the Democrats can do to stop the hearing or a vote. These appointments cannot be filibustered by the rules of the Senate. McCains death actually improved the Dem position as th... |
In animation, objects that are going to move in a scene (usually rocks) are a different color than anything around it. Why is this? | The static art was drawn and painted sometimes months in advance of the animation phase Even if the static, key, and animated frames all used the same colour palette the effects of light bleaching and dessication would alter the background colours Vs the animation colours Also studios started outsourcing more and more,... |
how my phone recognizes when I'm taking steps and accurately counts them | Your phone has many sensors inside, that measure all kinds of data like acceleration, orientation, position, the magnetic field, air pressure, and radio waves. individually it can be hard to interpret this data as you move around and do various activities all day. Your phone runs a complex algorithm that tries to answe... |
can old water harm you in any way possible? | The water itself can't hurt you, no matter how old it is. But depending on how it's stored and bottled it could be contaminated with something that can harm you. The two things I can think of off hand are biological and chemical. If you get a few cells of something like plankton in the water it can grow with just sunli... |
Q-tips have a warning not to use in the ear canal. So what are Q-tips for? | Applying/removing makeup, cleaning, arts and crafts like model making. Generally, sticking stuff into your ear isn't recommended because of the risk of introducing foreign material, packing in ear wax, or causing injury to the eardrum. |
Why is it good practice to give a company two weeks when you leave on your own but they don't give any notice when they let you go? | As long as it is not laid out in your employment contract, giving 2 weeks notice is a courtesy not required. Its to give the employer time to start looking for a replacement. You can absolutely quit and just walk out, but you won't get a great recommendation for future employers that way. Most places in the US are at-w... |
What would happen if I was to stay in the first gear of my car way past the speed it could handle ? | Modern cars have rev limiters to stop you, but otherwise the engine speed keeps increasing until something fails. Exactly what fails first depends on the engine design. If you're lucky, the valves simply can't close in time to generate power and you can't rev any higher. If you're unlucky, you badly damage the engine o... |
What makes an isotope stable, and what determines which subatomic particle they lose? | You have some balls made out of magnets. The magnets always repel each other. You have some other balls made out of plastic. Both ball types are covered in glue. If you force a small number of the magnets together the glue will continue to hold them together. But if you add too many, eventually the combined magnetic re... |
How do computers work on molecular level? | At the computer level it boils down to electrons and heat. I don't grok the new fangled monitors. Electrons changing state extremely, EXTRMELY, fast which in turn the power that takes generates heat which must be dealt with. |
What causes morning glory? Does it get less common as you get older? My wife just asked me and I didn’t have a clue | I'm 54 and I still get it, although of course its less common now--its a sign of good blood flow, many don't realize that if you're older and you don't get a full erection, that you may have heart problems", 'The birth defect of the optic nerve? That morning glory syndrome? |
How are LED lights so bright and use so little energy? | It's not really that LED lamps are really efficient, but that conventional lamps are really inefficient. Traditional light bulbs make a little piece of wire so hot that it almost burns. This creates a lot of heat. Similarly, using a candle or fire creates a lot of heat and a little bit of light. The energy required for... |
Why do animals live shorter than humans? | I don't think there will ever be a single ELI5 answer to this, there's a ton of stuff to take into account. First off humans don't live longer than many animals. Second off many animals live longer with human intervention. A huge part of it is our health care, ability to create shelter, clothes, fire, understanding of ... |
How does whistling happen? | Sound is pressure waves in the air created by vibration. When air flows at a certain speed across or through a certain shape, it can form eddies that oscillate between different shapes. This oscillation then releases pressure waves to the outside. Additionally, there can be feedback loops between these pressure waves a... |
Why does your body/bones ache when it’s cold or rainy outside? | TIL this is a real thing . I always thought this was made up by people who don't like cold/rainy weather. |
what was exploded in the Big Bang? | Nothing. There was no explosion. We currently observe that the universe is getting less dense. This tells us that is used to be denser. That's it. We still don't know what created the universe since we can't observe that early.The universe. The Universe was once very, very small and very, very dense. The thing we call ... |
why are plastics straws worse than plastic cups? | Part of the issue is the fact that *most* people don't need straws. They can drink their beverage without them. So the real push is to get restaurants to stop giving them out by default, but rather only when a customer asks for one. However you need a cup of some sort, you need utensils, etc.This whole plastic straw th... |
How do the lasers on modern computer mice track the movement of the mouse? | I'm not an expert on laser mouse tech, but I did work as an engineer at a prominent laser sensor company. I imagine what you have is a laser surrounded by an array sensors that give off a measurement of how much light they are taking in, likely filtered to ignore any light besides the lasers frequency. When the mouse m... |
Why can’t space vehicles use a principal like weather balloons to get beyond the atmosphere before firing rockets? | Even if they could, that wouldn't actually save very much fuel at all. [Orbit is not very high up. Orbit is *very* fast]. The vast majority of the rocket fuel is used up getting to the orbital velocity of 8 *kilometers* per second. Since we already have to pack that much fuel to stay in orbit, it's cheaper and easier t... |
Cousin degree and removal. | The degree is how many generations ago you had the same ancestor. So first cousin means you had the same grandparents, second cousin means you had the same great-grandparents but not parents etc. How many times removed is how many generations there in between you and the cousin. So your aunt or uncle's children are not... |
Does our digestive system digest stuff in the order we eat? eg, Will caffeine work slower if it is taken after food? | Things digest together. It's more of a matter of drinking coffee with a meal, or drinking separately, that influences how fast caffeine goes into your system. It's also why you are advised to take some medications together or right before/after meal, so that the pill is dissolved in a more controlled rate. |
Why do some programs stop working properly and need to be reloaded after the computer has been idle for quite some time? | As programs run through their code, or instructions, it's possible for the software to hang on a line which doesn't execute properly. Generally this stops processing as it is in a sort of infinite loop in that it's still attempting to move forward but some requirement isn't being met. |
How exactly do data packets work? | So a data packet is not really any sort of unique special object but a fragment of information defined by any sort of network communications protocol. Basically, it's a file that computers convert information into before sending it to other computers, and other computers will either: - send it to another other computer... |
Why are most archaeological sites buried? Why would they get covered with that much earth? | The sites we find are a portion of the sites that survived to the present day for us to find. Sites that were located on ground that has eroded away generally did not survive - you don't see many ancient ruins floating in the sky after the ground supporting them gave way. The ground can move both up and down for multip... |
Why it is said that how SSRIs work is unknow, when their name clearly suggests that they block re uptake of serotonin? | A good analogy on the topic. It is basically like knowing that a car needs oil to run properly but not knowing where exactly needs oil and what adding oil would mechanically change. You know oil is a lubricant to help things run smoothly but don't know which areas need need oil. SSRIs are like opening the hood of a car... |
stopping freezing water from expanding | No one has somehow mentioned vitreous ice yet. It's not found in nature but we use it on a daily basis in molecular biology, and it's actually insanely simple. Basically, you just lower the temperature of the water so rapidly , that it doesn't have time to form the normal crystal lattice structure that causes expansion... |
In lieu of recent debate(s) going on, how can judges be biased in their decision if they are supposed to follow the law? | Do the Constitution and all of the ammendents create a right to privacy that gives women the right to have an abortion? Does the second amendment, written in the time of muskets, protect a person's right to own a bazooka? The answers to questions like these are not written clearly in the text. It takes a careful readin... |
how do CDs and DVDs work? | CDs and DVDs are, for all intents and purposes, the same thing. Just different sizes. They have little pits on the disk surface but you can't see them because they're so small and because they're covered in a clear plastic layer to protect it. When the laser passes over the pit, it gets deflected from the laser detecto... |
When a magnet moves things around, where is that energy coming from? | This is easier to think about if you refresh yourself on what energy and force are. If I hold a weight up above the ground totally motionless, the weight has an innate amount of energy, so called *potential* energy. When I let it go it falls down, gaining active energy in the form of its motion, which is *kinetic* ener... |
How does a nose produce a seemingly infinite amount or snot? | Mucus in the body is produced by mucus membranes. Nose mucus is produced by mucus membranes lining the inner wall of the nose. The nose responds to an irritant, like fine particles or a virus causing inflammation for example, by trying to literally flush it out with mucus. This works with particulate irritants like pol... |
How exactly does a fuse work in an electrical plug? Recently had one blow on an appliance. | A fuse works a bit like a filament in a light bulb Inside the fuse is a small wire. When current flows through this wire it heats up, the more current that flows the hotter it gets. When it gets too hot the little wire will melt in the middle and break, this will open the circuit and stop the flow of current The thickn... |
Why do American houses have such thin walls? | In new construction, walls are usually made out of studs and drywall. Drywall is made of gypsum, and it comes in thin sheets. You can punch through drywall fairly easily. It's used for interior walls because it's cheap, it's light, it's easy to install, and it's easy to paint and make it look nice. |
Why can't we quickly clean up the Great Pacific Garbage Patch? | Most importantly, who is going to pay for it? There is no money to be made by cleaning up the ocean. Unlike coastal areas, government have no incentive to pay for it It would cost many billions of dollars for the machinery, front line ships, and support ships to make this happen. Far more than an NGO like Greenpeace ha... |
How do MRIs work? | Everything is made of atoms. These atoms act like little bar magnets. Just like a compass bar magnet will rotate to align with the Earth's very large but weak magnetic field, when a human enters an MRI machine, our atomic bar magnets will rotate to align with the MRI machine's small but very strong magnetic field. Now ... |
Why don’t high performance cars put turbos on higher displacement engines and get much more power | Depends on the goal of the car. The Ford GT for example went with the ecoboost so it could compete in a certain racing class with displacement rules, plus it promotes the ecoboost engine Ford is pushing. The Hellcat just has a blower on its 6.2L Hemi, so that engine didn't change other than the blower so I don't know w... |
Why can someone have a lung transplant if they have for example, cystic fibrosis, but it's unheard of with a lung disease like COPD? | My grandfather got a tx with COPD. Though, as was already mentioned, he didn't live much longer and his quality of life was not that much improved. |
If a Public/Private key is a set of numbers, then why do they also have letters and + and - signs? | The encoding mechanism of the key you've shared is base 64. This mechanism uses letters and numbers to represent .numbers. Just like base 2 uses 1 and 0 and base 11 throws in a letter, base 64 throws in lots of letters to represent the underlying numbers efficiently. So that string is a _representation_ of the key, usi... |
How did we settle on a 7 day week? | It's important to note that most ancient civilizations came up with the seven day week on their own. It wasn't invented by one culture and everybody else thought it was great and adopted it. The ancient Babylonians, Chinese, Greeks, Romans, Norse, Japanese all used a seven day week. In the case of several of them, nota... |
What does pleading guilty mean? | Pleading guilty means you are willing to skip the trial and accept whatever sentence the judge gives you. Defendants usually have no reason to do this until they have made some arrangement with the prosecution, usually involving less serious charges or sentences. Prosecutors win because of they get a conviction rather ... |
Why the hell do geese slowly walk across the road instead of fly? | Sometimes I find it is more practical to park, get out, and chase them on the way. Stand or run behind them and flap your arms. If you have a broom or hockey stick with you, wave that [don't hit them]. The actual answer is that flying is nothing to a sparrow, but take-off for a goose is a lot of effort. Once flying, th... |
Why can two video files, both 1080p and 24 seconds long, have vastly different file sizes (64MB vs 250MB)? | sounds like a .rmvb compared against a standard codec like .avi, .mpg, or h264 . if ytou were to watch them, you'd notice a huge difference in quality. The .rmvb will look washed out, grainy, and may look slightly blurry in motion scenes. |
What actually happens to the body when someone dies of old age, and why? | We don't actually die from old age. As we age, our body becomes less and less proficient at repairing the damage that our bodies inevitably suffer throughout our lives. This means that eventually something is going to happen to you that your body would have been able to recover from in your youth, but in old age you ma... |
How do antibiotics know where the infection is? | Well they don't. You take a pill, it gets absorbed, blood takes it everywhere and whenever a drug molecule encounters microbe it'll interfere with it's multiplication process. Also sometimes antibiotics are administered locally, for specific infections, for example eye drops.It just kills all bacteria it gets its hands... |
Why is the sky Red, Orange, Yellow, and Blue, but never green? ROYgBIV tells me that the light wavelengths should go from yellow to green before they get blue. | we regularly get green in our sunsets here in Hawaii, there is even a phenomenon known as the green flash that happens during sunsets here that I've seen several times as well |
How did cavemen "brush their teeth" and why didnt their teeth rot and fall out? | From what I've read they ate a lot more rough course foods. Chewing things that are hard scrape our teeth for us kind of like it does for other animals. The problem for our modern teeth is we eat a lot of soft refined foods and a lot of sugar. That stuff just sits there and gets stuck which causes tooth decay.* by gnaw... |
How do fanfilms/ lower budget games have soundtracks that sound like a live orchestra? | Record music onto a computer, press a button that adds a pre-generated orchestral effect, profit. My girlfriend works as a producer in radio and she showed me how simple it is to make things sound live. To make it sound like more instruments are playing, you can simply just record more of the same lines, or you could c... |
How do researches come to the conclusion that a species is extinct (such as with the recent news of the blue macaw being labeled extinct in the wild)? | They can't find living ones anymore. Species with very low population are tracked down, numbered, and observed, so they know when the last individual of the species dies. |
Why do bad actors like Nicholas Cage and Tommy Wiseau still get cast in movies? | They still make money for their films, that's all that matters. Cage is a good actor when directed well . Name recognition is like free marketing, and if you can get a known name for your movie that goes a long way to sell it. Plus a lot of people tune in to Cage movies to see him flip out on the screen, as is his wont... |
How is tinted glass transparent, reflective, and absorbant at the same time? | It actually can't - the more it reflects, the less it can transmit and vice versa. It's described by [Fresnel equations], but I don't understand them nowhere near enough to ELI5 them, but the basic idea is that the more the surface reflects at any given angle and polarization, the less it can transmit and absorb, or in... |
Why are there no electric guitars with built in speakers or amplifiers | They've existed for decades now. However smaller amps typically don't have the same sound or versatility as a real amp/pedal system. In more recent years, the tone is now more or less the same as a real amp, but people have been using the traditional system for over 50 years now, so why change all of a sudden? For exam... |
if magnets lose their magnetic properties when heated, how is the earth's core magnetic? | Magnetism arises when items with charge move. The faster they move, the stronger the field. The more of them that move in the same fashion the stronger the field. In bar magnets the charge that is moving is the electrons around each iron atom. All electrons spin, but iron and other materials can tend to have the electr... |
Why do brakes on a car hardly fail and you never hear about a car accident due to a brake failure/malfunction? | There is a lot of engineering that goes in to building systems that don't fail much. As others have mentioned, brakes have a lot of over engineering. Not mentioned is that your car has two completely separate braking systems. One controls the right front and left rear wheel, the other controls the left front and right ... |
Why is it so common with tornadoes in the US but not in Europe? | The US has 75% of the world's tornadoes. The Great Plains are conducive to the type of thunderstorms that spawn tornadoes. It is in this region that cool, dry air in the upper levels of the atmosphere caps warm, humid surface air. This situation leads to a very unstable atmosphere and the development of severe thunders... |
Why do litters of animals have a runt? Why is there always one offspring that happens to be weaker than the rest? | Historically, I think the runt just referred to the smallest or weakest of the litter. That's bound to happen when you have multiple offspring, however small or large the difference is. |
Why does hot water feel nice, but hot air makes me feel like dying. | I would have said it's because you get into a hot tub out of choice, and maybe you're cold before you get in.When you're outside and walking/moving in hot weather, chances are you weren't that cold to begin with and just want to cool down. |
Why are there so many studies on cancers being successfully treated in mice but we are still nowhere near curing cancer? | There are lots of studies on cancers being successfully treated in humans as well Unfortunately cancer is a broad term for tumors that spread, but tumors in the liver need different from tumors in the brain or tumors in the lymph nodes Most cancer treatments are also very aggressive. Killing tumor cells but not healthy... |
The Primary roles in the Executive Branch and Congress come with term limits. Why does the supreme court have lifelong terms? | Congress does **not** have term limits, other than those imposed by losing your re-election. The founders wanted the judiciary to be immune from the pressures of whatever the political spirit of the day was. Having them up for reappointment would not accomplish that. So you have either life-long terms, or you would nee... |
- What is Cerebral Palsy? | It's a disease caused by deformation, damage, or abnormal development of the parts of the brain that control movement. It usually hapoens duribg pregnancy. There are multiple types, that range from stiff muscles to inability to walk or stand. |
Why does toothpaste make my mouth feel cold after brushing my teeth? | Assuming your toothpaste is mint, it's because mint has menthol, an ingredient that tricks your brain into thinking something is cold. |
Why does holding my breath for a really long time stop the hiccups? Is is psychosomatic or is there a physiological reason for it? | Hiccups are caused by a glitch in the vagus nerve. This glitch causes, among other things, small body spasms and diaphragm contractions. There are many different theories as to what causes this glitch, with the most popular being that it is a vestigial reflex from fetal development. The vagus nerve is fairly sensitive ... |
How do spiders span the first strand of a new web without having it stick to walls, floors and other random stuff? | The first strand does stick to random stuff, which is literally what they use to determine where the web is going to be. They cast the line out into the wind and whatever it hits is where they go. The spider in question has no idea of where point B is, only that it's currently at point A. If the spider doesn't like it,... |
Why isn’t there a Texas Instruments Graphing Calculator app? | Two reasons, one is that their calculators are basically required for school and TI charges a whole lot of money for those things. They make boatloads of money off those calculators and they do not want to give you a reason not to buy them. And two, even if they had an app, you couldn't use it on tests because your pho... |
How does a hurricane move at only 13 mph, but have sustained winds of 140+ mph? | The hurricane itself is a huge mass of rotating wind. So the system as a whole moves slowly, but it's rotation is much faster than its linear motion, and the winds we feel are from its rotation. |
What was/is the purpose of the LHC? | It's sorta like how car companies will crash their cars in order to see what happens to them and the dummies inside them. Except in this case, you're smashing tiny particles together to mimic the big bang, and you're looking for evidence of subatomic particles that we don't **know** exist but are sure are there because... |
if testosterone and estradiol (hormones) control growth in your body during puberty, is it possible to inject these hormones to promote extra growth? Do people do this? What are the repercussions? | people definitely do this as adults. if we're talking about for extra growth then that discussion could be about performance enhancing drugs which are commonly used for decades by elite athletes and bodybuilders. The extra growth would be in the form of muscle tissue and fat but not height. Growth hormone can cause exc... |
Why does a 2 hour long video on YouTube loads up a lot faster than any other movie streaming websites? | Is this an illegal site you're trying to use for the film? They have to survive on what little premium membership and advertising they can get, and that means not a whole lot of room in the budget for good infrastructure. YouTube on the other hand is owned by Google, who can freely spend *billions* on making YT a smoot... |
Why is it bad to cook meat that hasn't thawed? Is it a bacterial issue? Texture? Both? | Water has two different properties relating to heat specific heat capacity and latent heat - _URL_1_ basically it takes as much energy to raise the temperature of water to 80 centigrade as it does to take it from ice at 0 centigrade to water at 0 centigrade. Bacteria needs to have its temperature raise to over 40 centi... |
if rat fleas are natural carriers of the plague, how come they don't transmit it anymore? | It's still somewhat common, it's just treatable with antibiotics now. I was out in Rocky mountain national park last summer and they have signs up warning people that the ground squirrels carry the plague. |
How do economies of scale work with regard to retail profit margins? | Technology and logistic advancements play a huge role economies of scale as well. On the technology side, the farmer that has 1M acres may have specialized gear, timing, chemicals, GMO's, etc that help him Max the yield of that acre vs what someone's grandpa is growing their back yard. On the logistics side there may b... |
How did Musicians used to make money when their songs got played on the radio or their videos got played on MTV back in the 90s? | Former musician that actually had music on MTV back in the early 2000s. For me, it was songwriting royalties. I go through a company called BMI and they keep track of all the plays my songs get. Every so often I get checks from the royalties that are paid by MTV, radio stations, etc. Members of the band that aren't the... |
Why do many internet services require REGIONAL servers? Will we need them forever? | > Will there ever be a time in the future where people across the globe will be able to play games/operate over the internet with no latency delays? No, because the speed of light will always exist. The circumference of the earth is 24,901 miles, half of that is 12450.5 miles. Therefore if you're trying to communicate ... |
32 bit processor vs 64 bit processor | It's simply extending the effective storage space it can accurately point to without errors. In more simplified terms, you have two hands with 5 digits. Imagine 32 bit is like your first hand. You can easily count to 5 on it you can even use some clever Binary counting to reach 32 on a single hand. But there's no 6th f... |
What do people learn as computer science majors? | A good comp-sci degree is going to cover some maths including algebra, calculus, and linear algebra - a lot of computation and machine learning is done in LA. You should learn a lot about computability, Church-Turing, the halting problem, graph theory, language parsing, and language theory. You'll learn about computer ... |
Why aren’t plants black? | One theory I've heard is that early earth was purple due to archaea. Chlorophyll evolved to take advantage of the gap in color absorption that existed, and actually turned out to be the superior photosynthesis molecule. Of course it could also be that it's just more than good enough and there's little to no selection p... |
How these dime a dozen small business cash advance firms operate | Imagine that you had enough cash to loan money to people, and that you could charge 400% APR on that loan. That's what these places charge . |
Why is talking yourself aloud frowned upon but singing alone is not? | Singing alone is seen as practicing singing. It's also music which you can listen to alone . If you're rehearsing a speech alone then that would make sense but if you're just yapping away by yourself it's like, who are you talking to? Some people might just be thinking out loud, but its hard to distinguish between that... |
Why do most some modes of public transportation (i.e busses) not have seatbelts when all private vehicles are required to have seatbelts? | To get to the underlying answer here, a big bus has a lot more momentum than a car, so in a collision a bus won't decelerate as quickly, and therefore there's less risk of injury. |
Why are fish not scared of bigger animals like turtles, manatees or alligators when they are close by but completely freak out when a human swims close to them? | Thing A is a threat you run away you survive Thing B isn't a threat you carry on doing what you are doing you survive Thing C is unknown you run away just in case Thing C turns out to be Thing A. |
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