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How do fruit flies start? | There's a very famous experiment where the scientist took two jars with meat and put a cloth over one but left exposed the other. Guess which one got flies - NOT the one with the cover. The flies are attracted to it even before it decays. They lay their eggs, which you don't see, and they later hatch. Only then do you ... |
Why do human teeth get infected and die off so easily? | I also experienced tooth decay and I will give you advice. Teeth are physical structures, not chemical structures. Therefore, unlike other body organs, it is very simple to manage and if teeth are well managed, teeth are preserved until you are 70 years old.And conversely, because it is not a chemical structure, it can... |
why is rainbow curved? | A raindrop can refract light and, the same way a prism does, break the white light into the colors of the spectrum. A prism doesn't create a curved display though, because it's only one object doing the refracting. With the sun at your back and you see it shining on falling raindrops there are *huge* numbers of droplet... |
Why does gold run in veins? All heavy metals like this come from supernovas. Why would they concentrate in some position when they eventually make it to Earth? | As I understand it, at a given heat and temperature, minerals become dissolved/melted and as they flow cool and condense at certain points and you wind up with concentrations. Gold may be a little more involved, since it's fairly inert, but this is how you get veins of crystals and the like. |
If lightning is drawn to metal and the tallest objects in a given area, why doesn’t it always strike airplanes? | Even though there are around 9000 aircraft in the skies at any one time, that's still not many compared to the surface area of the planet, so thunderstorms do not often get the chance to zap one - as someone else has already posted, aircraft also tend to avoid thunderstorms if they have any option. They *do* get hit th... |
Why do fans make rooms colder? Wouldn’t faster moving air molecules make a room warmer? | Fans don't make rooms colder, they just blast you with air, that gives you this sensation. Its like when you put your hand outside of a really fast moving car, despite the temperature it always feels chilly.The same reason you can blow on a cup of hot soup to cool it off & #x200B; & #x200B; & #x200B; **MAGIC** |
Why is it rude to ask how much someone’s salary is? | Humans are greedy, envious, prideful creatures. They want more than the person next to them and will do stupid, and sometimes hurtful things to each other just to be better off than their neighbors. If person A finds out person B gets paid more, person A will make it their goal to be paid at least the same as person B,... |
Why do modern cinemas still use projectors? | They don't still use film projectors. They use digital projectors. Projectors are necessary because a screen big enough for a movie theater would be insanely expensive. |
What is intermittent fasting? I've been seeing posts describing they lost a ton of weight by doing it, can anyone explain? | It's just another way to try and limit your calorie intake. That's really all weight loss boils down to calories in versus calories expended. If you're using more than you're putting in, you will lose weight. Making it so there are times you're strictly prevented from eating, as long as you stick to it, generally trans... |
Why do railway tracks have stones around? | I didn't see any other responses mention ease of maintenance, so I guess I'll chime in. One of the main factors limiting the travel speed of trains is the dimensional consistency of the tracks. By using a very stable material like stone, the dimensional stability of the track bed is increased, as others have said, beca... |
How do anti-tank weapons kill tank crews after penetrating armor? | At least for WW2, survivability was largely a function of being able to get out before the stored ammunition caught fire. Fuel fires were kind of whatever, you have extinguisher systems and it's also mostly on the other side of a bulkhead from the crew. But ammo was generally stored in the open with the crew. And it bu... |
How modern tanks are said to be indestructible against WW2 era tanks? | Same way you can't destroy a ww2 take with a bb gun. The armor is too strong to penetrate with ww2 Era ordinance. Honestly, you could either sit far enough away and kill a ww2 tank before they even know you're there, or drive circles around them faster than the turret can turn. |
Why sometimes when you take a short nap for a half hour that it sometimes feels like you've been asleep for days? | You nap less times than you actually sleep. So you're used to be asleep for way longer than half an hour. When you wake up there is no way to know how much you have slept until you look at the time. So whenever you wake up and there is no clear sign of what time it is you automatically assume you've slept for a long ti... |
Why is it bad to "blank" fire a bow? to release the string with no arrow in it. | When you pull back the string, the actual bow frame, or the pulley system on a compound bow has an incredible amount of potential energy building up. By releasing the string, the bow snaps back to its original at rest position. All of that built up energy is imparted on the string. In a normal situating, the string the... |
How do we know the verbal pronunciations of words and phrases from dead languages? | Just because a language is dead now doesn't mean it was always dead. Back when it was not dead, there was a valuable niche in being able to speak it. This often led to folks writing down relationships to sounds as well an word translations between the language and others of the period. It may take a few steps, but it's... |
Why does the USA have so many nuclear power plants, despite only producing 9.6% of its electricity from nuclear? | Where did you get the 9.6% figure? For the past few decades nuclear power has produced around 20% of America's electricity. According to [the U.S. Energy Information Administration] it is currently 19.7%.In Canada we have a lot of hydro power. We make the electricity and put it on the grid for everyone to use. The grid... |
What determines the center of the world map? | There are Chinese centered maps from ancient China and Mediterranean centered from ancient Rome. Many old maps didn't have North or south either, as they used stars instead to ubicate. At the end of the day, Europe got powerful and we use the maps used by them. And we use those old maps with Europe being the westest pa... |
Why are triangles the most stable shape in construction/engineering? | I'll start with a square. If a square is made from four boards and every corner is a hinge like your elbow, there is a problem. This shape can easily be squished out of shape. Your square can easily be changed into a parallelagram, A triangle cannot. A triangle is said to be inherently rigid because of this. It's natur... |
How do poems written in foreign languages still rhyme after translation? Is the rhyming kept at the expense of original meaning? | When translating poems you essentially have to choose between preserving the exact meaning of the poem or the exact structure of the poem: if you translate the words as faithfully as possible the rhymes and metre of the poem will most likely suffer. If you preserve the structure of the poem you're going to have to choo... |
How were 2 countries able to discover and build nuclear weapons from scratch, simultaneously during the 1940s but most countries today can't build them without decades of effort? | Building nukes is not actually all that technically difficult when you know the basics of how it is done. Almost any developed country could build their own nuke if they wanted too. The problem is that it would hard to do so without tipping anyone of and the countries who already have nukes don't want anyone else to jo... |
Why does it take 24 hours for muscles to start hurting after a workout? Why not straight away? | Animals whose muscles ache the day *after* **running for their lives** don't have to stop running as a result of muscle aches, especially when **they need to run for their lives**. |
Why is it common amongst animals to give multiple births but not in humans? | Humans are really bad at giving birth, even compared to other apes. Turning our posture permanently upright required narrower, oddly angled hips, while developing sapience required big brains . Our babies are born undercooked as a result, remaining helpless for far longer than other newborns, and they're still barely a... |
If we have the ability to cultivate and grow our own food as well as being able to create it in laboratories, why is world hunger still a problem? | World hunger is an economic problem, not a production problem. Rich areas have excess food. Poor areas lack. Rich areas have limited motivation to give away and ship food , and poor areas can't afford the tech for massive production. |
Why do all the other rocky planets in photos look covered in craters from meteors, yet earth doesn’t seem to have any? | I just compeleted a degree in Earth Science and have some insight. I am seeing a lot of answers talking about how our atmosphere protects us from asteroids. While this is true it is not the main reason we don't have large craters on Earth. The key reason is actually plate tectonics and erosion. In the beginning of the ... |
why are solar-powered cars not a thing? think of the battery recharge on a sunny day sitting in rush hour! | They are a thing, it's just not really viable unless you live in southern California or a place with a similar climate. |
Why are there “acquired tastes”? Why do some things, like beer, whiskey, and food delicacies take a few tries to become palatable? | We rely more on primal defences when we are children. Intense, bitter, or weird flavours cause a knee-jerk reaction that the food could be bad or dangerous. As adults we have the cognitive ability to override our initial reactions to something, we have more experience and can make positive associations towards certain ... |
Why do medications for mood/depression (Zoloft, Celexa, etc) take weeks to "kick in"? | Part of it is because we tell people it will take weeks to kick in. If we didn't, then a substantial amount of patients would feel a difference straight away. On a side note, have you ever seen the actual efficacy of anti-depressants? They are barely better than a placebo. To the extent they *work at all* no one really... |
Why is the current weather in Europe much more dangerous (at least as reported in the news) compared to other locations at similar latitudes? | High humidity . Houses built with large thermal mass Lack of exposure to high heat . Lack of AC, because we don't usually have to deal with fatal temperatures. |
why would the death penalty cost more per year than a system of life (in prison) without possibility of parole? | The death penalty itself isn't all that expensive. But the amount of court appeals leading up to it are typically costly and lengthy.In the US death penalty cases have mandatory appeals. Because the states have a very bad history with unjust application of the death penalty the courts have imposed upon them a system of... |
Why is the air cold when you fan yourself on a very hot day? Doesn't motion generate heat? | It blows away the warm air that you'r body heats up.After that you' sweat can evaporate again which drains heat from you'r body. |
Tablet screens vs E-Reader screens | It's e-ink, or electric ink. Imagine a tiny magnetic ball painted half white, half black. It will rotate according to the magnetic field around it, showing either its white face up, or black face up. Put thousands of them together, you have e-ink. Now you can imagine why backlight is not necessary. |
what's the difference between gas grades, i.e. 87, 88 "the new standard" and flex fuel? | 88 octane won't do any harm, but it won't gain you anything either. Read the owner's manual, if it says flex fuel is ok, then you can use that. Expect worse mileage on E85 gas though. |
Why don’t law enforcement officers use tranquilizer guns to subdue perpetrators? | Because they don't work fast enough. When someone is charging you with a knife, you can't wait 20 seconds for drugs to take effect.Knocking people out chemically without killing them is [difficult. ] Weight, age, preexisting conditions etc make it extremely dangerous to try a one size fits all approach. There is a reas... |
Why do nuclear reactors rely on diesel generators in emergencies? | > Is there a reason that power generated by normal operation can't be stored for emergency use? In a large scale battery or something like that? It can be, that gets you through a couple days. What do you do when you need to keep the coolant pumping for weeks or months? Its impractical to build a big enough battery ban... |
If gravity can bend light and distort images, why isn't earth's (and other planets) images distorted when we look at them through a telescope? | [This is how] gravity distorts images, and you need A LOT of gravity to really see the effect in a telescope. Otherwise, defects in the lens / mirror of the telescope, and the shimmering of the atmosphere, distort images MUCH more than what Earth's gravity does. This is why space telescopes have much clearer images tha... |
I've always heard that not eating breakfast is bad for you, but what are the actual consequences if you skip breakfast? | The consequences depend on your physical state and what you are doing. If you're an office worker in normal health, the worst consequence would probably be you getting hangry or overeating at lunch. If you're a diabetic who is taking medication when you wake up, not eating then could result in dangerously low blood sug... |
Why are there so many sign languages? | > It would just seem to make more sense if there was one universal sign language. Well yes, but you could say the same thing about spoken languages. Signed languages are no different. So the reason that signed languages haven't coalesced into a single language is the same reason that spoken or written languages haven't... |
How does instinct work? How does an organism know how to do something without learning it from something else? | I probably shouldn't be saying anything on this subject because I am not educated in the area but Its not really known. They are starting to theorize that DNA might store some type of memories. Like I said its above my head I am just rambling BS that I have heard from others. |
Why do people usually have to fast before an operation, and how does this work in case of an urgent, unplanned operation where the person has not been fasting? | Has to do with the sedatives the patient is given to knock them out/ keep them unconscious. Food in the digestive system can make the patient vomit or need to eliminate upon coming to. This is an especially bad thing if the operation is near an area where muscles violently contract . Also reduces the risk of rupturing ... |
How did the United States historically handle previous mass migrations into the country? | There is no blanket answer here, as the US has handled immigration differently over the course of its history. One of the most famous periods was between the 1890's and 1950's. In this time period, immigrants took a boat to Staten Island, were checked for diseases, then disembarked. Passengers underwent an interview , ... |
if a nuclear war would produce an ecological catastrophe, why hasn't nuclear tests produced it yet? | Many of these were done either under ground or far away from where the fallout could touch land. They also we're not all at once on one day as a nuclear war would almost certainly be or be close to. Firing them in the atmosphere above land and causing the radioactive dust particles of fallout would cause many of the pl... |
Why can't we use materials with lower boiling points to generate power? | You are correct that it doesn't matter what is spinning the turbines, as long as they are spinning. The reason that we use water instead of something else comes down to two reasons. First, we've got lots and lots of water, so it's easy to get and super cheap. Second, water is good at making pressure. The turbine spins ... |
How is the Universe expanding, but it's not expanding *into* a larger containing space? | Don't think of the balloon analogy as us being inside the balloon, but on the surface of the balloon. We're 2d, but expanding 3 dimensionally into an environment. So what are we expanding into? No idea. The answer is probably an equation that doesn't make a lot of sense anyways. Like n-dimensional matrix algebra.You mi... |
What is the benefit of doctors and nurses in hospitals working shifts longer than 8 hours? | More days off. I work 12 hour shifts as an EMT - they keep exploring the possibility of changing to 10 hours or a mix of 12 and 8 hour shifts, but they can get fucked if they think I am giving up my 4 on 4 off pattern. I love 4 day weekends every single week . I work full time hours, but am off work 50% of the time, it... |
How does Russia manage to antagonize much of the West when its economy is not much bigger than Australia or Spain??? | Russia still has a robust intelligence system from the cold war. Human Intel isn't as expensive as fancy equipment. A single B2 bomber costs a billion dollars, that's enough to employ tens of thousands of agents for decades. |
Why are mobile game ads are so bad? | Mobile games are first of all, hard to program and at the same time mobiles are not big on gaming, not many people invest in making big and good video games on phone. Also mobile game developers are usually reputable and have big companies like Supercell and such, advertising is not that necessary for them. So it's the... |
What happens to the brain when you zone out? | It goes into a fifth dimension beyond that which is known to man. It is a dimension as vast as space and as timeless as infinity. It is the middle ground between light and shadow, between science and superstition, and it lies between the pit of man's fears and the summit of his knowledge. |
The controversy around the reliability of Wikipedia | Since Wiki can be edited by anyone at any time there is no way of guaranteeing anything in Wiki is accurate. However since it is so often used, errors do tend to be rapidly corrected and you can track the links to find where the information is supposedly coming from. So Wiki shouldn't be used as a sole or primary sourc... |
What is a good scenario to use the lower gears of an automatic transmission vehicle and why? | If you're getting ready to pass on a two-lane road, downshift in preparation of accelerating instead of waiting for the transmission to do it. Some automatics are slow to downshift when you hit the gas.When driving downhill to use engine braking and avoid relying too much on your brake pedal. This one applies mostly to... |
how do cameramen and women in films hide the cameras whilst filming so well when there is a scene with reflections? | As others have said, CGI and/or simple disguises . For a stunning example of the CGI approach, check out this shot from the Kenzo ad: _URL_0_ So many mirrors. All the reflections replaced with CGI. ", 'Sometimes they just drape something dark around the camera and hope the audience doesn't notice. Google "matrix door k... |
Why are computers and electronics in general restricted to binary system (0 and 1)? Why not 0,1 and 2? | At the deepest level, a computer still requires analog mechanisms. To use a 2, you have to define a 2 in some way in hardware. It's much easier to use 0 for off and 1 for on with high speed switching transistors. Using 1s and 0s in the right order gives you a way to represent 2 in binary: 0010.Modern flash memory is an... |
Is there any scientific reason why the US's shuttle launches were about as far East as they can possibly manage on their home soil? | Rockets launch to the East so they can use the Earth's spin to help them get the speed they need to stay in space. They are located as East as possible so that the lower bits of rocket they dump and the rockets that mess up all crash into the ocean rather than places where there are people living. The Soviet Union didn... |
why isn’t it possible to keep Great White Sharks healthy and alive, as all attempts cause the sharks to die rather quickly in a contained environment? | I've heard that it is basically impossible to accommodate their swimming needs, and the only real solution was a literally impossibly sized pool with all corners rounded off so the shark couldn't keep running itself into them and had endless room to swim. I dont think that has been tested, and if it has, it wasn't a su... |
Why does rain have a calming effect on people? | This is a pretty subjective question. Not everyone feels calmed by the sound of rainfall. Ombraphobia and astraphobia are both somewhat common phobias. But for me personally, I feel calmed by rain because it reminds me that I'm safe, warm, and dry in my apartment or other building. It makes me aware of the fact that I'... |
Why can a thermal flask keep items cold for 24 hours, but only hot for 12 hours. | All the more technical answers are totally true and good, but I would like to offer a simpler to understand alternative: Heat = energy. There is no such thing as cold energy that makes something cold, there is simply the absence of energy. So, when you have a hot drink you have a cup full of energy that radiates outwar... |
the reflection on highways we see from a distance that disappears as we approach that point? | That's a [mirage]. The light from high-up things gets bent down to where you'd think the road would be. |
How are paintings proven real or fake? | If the painting was supposedly painted before the first atomic bomb test samples of the blue paint can be analyzed to see if it contains radioactive isotopes of cesium and strontium that aren't found in nature until the first atomic bomb test. |
Why do antidepressants dampen emotions? | Is this just with SSRI's because I start Wellbutrin at the end of the week and would rather not feel gray all of the time. |
why does slouching and bad posture feel so much better than good posture? | It only feels better if you're used to it. I used to have a bad slouch that fucked up my back muscles, and for the first couple months of PT and good posture, I felt miserable, but a year and a half later, it actually hurts me to slouch. |
Why do you get better performance when playing a PC game in Windowed (Borderless) than you do in Fullscreen? | Assuming it's the same resolution, you should get the same performance. If it's a lower resolution - perhaps because it's not taking up the whole screen, then it doesn't have to work so hard. |
The saying goes “never add water to acid”. How come your stomach acid does not react when you drink water? | The issue is mainly with concentrated solutions of strong acids, and mainly of sulfuric acids. Because they heat up as they mix with water, there is a danger of so much heat being produced that it boils the solution and splashes concentrated acid all over you. Your stomach acid is HCl, where this effect isn't that stro... |
Is "yawning because of boredom" a cultural thing that is (unintentionally) taught to us or is it natural? And why? | It isn't known why we yawn at all. Yawning while bored isn't universal even within the same culture. It's unlikely to be a learned behavior because it is a reflex, but it's possible it is a conditioned behavior. For example, if you were bored a lot while you were tired, you could associate boredom with fatigue and that... |
How does the DMAS (divide first then multiply then add then subtract) hold true in real word physics and situations? | It doesn't and does. You could use any order as long as you were consistent and formed the equations correctly. Or just skip all order of operations and nestle things inside brackets working outwards. |
Why is everyone blaming the "boomers" for today's economy? | Simple: They took advantage of everything the Greatest Generation left them, and then they closed the door behind them. They dialed back the necessary anti-crony policies that were put into place after the Great Depression, and they enshrined trickle-down economics for decades, a system that obviously, painfully, doesn... |
How does cruise control work? | All new cars have electronic throttle control, meaning the gas pedal is hooked up to an electronic switch that is then connected to the ECU . In older cars, the gas pedal was connected to a metal cable that opened or closed the throttle valve which increased airflow into the engine. The increased airflow would be sense... |
how jumping in to water from a high place is a suicide | Water is only soft if you move slow. You know how a belly flop hurts from a 6' diving board? Now imagine 60' |
Tuition Reimbursements and what it entitles. | If your tuition was $2000 or $5000 or $8900, etc. then they'll reimburse 100%. If it's $20,000 they'll reimburse $9000. Some companies might only cover, say, 50% of tuition costs instead of all . I believe the cost is taxable as a benefit. |
why is bacon so different from the rest of the pig? | Back fat, belly fat, it all has it's own flavor, bacon obviously, is the most healthy choice! |
Why do restaurants bother serving free bread/chips etc.? | That little bit of food actually makes you hungrier. I'm sure it helps with making customers friendlier. Most people are irritable when hungry. This is also the reason why Costco and other stores give free samples. You buy more food when you are hungry, and the samples help that process along. |
Why do horses have horse shoes | Horse hooves are pretty soft. They're great for walking around on soft surfaces like wild grasslands and areas with softer soil, with the occasional running thrown in. They aren't great in mountainous areas or places with a lot of hard rocks and hard soils. They're really not great for pavement, tracks, or roads. And t... |
If Ethernet cable can transfer so much data, why not use this instead of HDMI and other cables for data. | * **Ethernet** is actually a system for transferring information. It happens to use Category 5 or 6 cable * You can do lots of stuff with CAT5 cables that has nothing to do with ethernet like your physics class and your Line 6 guitar.* There already are products that use CAT5 and CAT6 to get things like audio and video... |
How do medical examiners know that a victim was still alive when cuts/bruises etc occured? | Heart pumps when you're alive. Blood leaks, pools, spills, and all that fun stuff. Person dies, heart stops, no more moving blood. |
Why do common household items (shampoo, toothpaste, medicine, etc.) have expiration dates and what happens once the expiration date passes? | I agree with other replies. Also though, sometimes it's just a messed up way companies try to persuade you to trash and repurchase a product you already bought.Related question: What happens if you leave OTC medicine in your hot car all summer? Does it lose its effectiveness to the point of being useless or even harmf... |
If adrenaline boosts our mental quickness and physical strengths, how come it isn't always pumping through our veins? | For an example of why you wouldn't want adrenaline constantly being released at high levels, look up pheochromocytoma. This is a problem where an adrenaline secretion tumor does exactly what you have suggested. Instead of a super human, you get high blood pressure, headache, sweating, high heart rate, high blood sugar ... |
Why is Mercury poisonous? What exactly is it doing to the body, and why can it not be resisted? | Elements come in different oxidation states . When Mercury lacks two electrons ), it gets confused with other metals like Magnesium ) by certain proteins that usually contain Magnesium. These proteins incorporate Hg instead, which renders them useless. Since Hg stays in your body this process continues even after the u... |
How much does it really matter where I buy my gas? Are “name brand” gas stations any different? | It used to matter. Gasoline is a formula of fraction products of petroleum. Before standards, some brands were famous for smelling different. Some charged more and were more expensive, or had a following. It hasn't really mattered since before widespread regulation on the quality of gas, maybe 70 years or so. |
Why aren't there many naturally occurring liquid substances on Earth? Does matter have a "preference" for being in a solid and gaseous state? | What do you mean? Our whole planet is covered in water, but even that is insignificant. Below the fifteen or so miles of crust is an entire planet of liquid rock. We're like 99% liquid, dawg. |
what does tax withholding mean? | You have a job, which means you have income, which means you owe income tax and social security tax. There are two ways that you can pay: 1) You take all the money home, but then tax season comes around you owe the government $2,000, and have 2 weeks to pay. Hopefully you were saving up for that expense. 2) Your boss w... |
If we've discovered recently that modern humans are actually a mix of Homo Sapiens Neanderthalensis and Homo Sapiens Sapiens DNA, why haven't we created a new classification for ourselves? | In terms of taxonomy something isn't a different species if interbreeding is still possible. Neanderthals were physically and culturally different but still bred with homo sapiens to produce offspring that could themselves pass on their traits. We named them before we knew what the path was that led to Neanderthals was... |
How does skin tan? Why is it so dangerous without proper sunscreen? | Dropped biology last year but I'll try, please correct me if I'm wrong. When you skin is in the sun it produces melanin I believe, which protects your skin against harmful radiation from the sun, and as a side effect browns your skin. The radiation is harmful because it can screw with the genetics of individual cells ,... |
How do you store medicine properly when it's hot?. | Your refrigerator is not humid, it's cold, but the all the humidity inside the refrigerator condenses on the evaporator coils. That's why you need to store vegetables in the crisper drawer |
How hasn’t natural selection weeded out individuals with bad eyesight, fatal allergies, and everything of the sort? | Because survival in modern society isn't reliant on such things. Think about maybe 2000 years ago. Say you have poor eyesight, you would be more prone to being robbed as you may not be able to make out people approaching at night or may not be suited for high paying jobs. You end up poor and no woman wants you. Lets sa... |
How are emergency numbers (e.g. 911) handled near borders of countries? | Well here in Australia our emergency number is 000 but if a US citizen is here and needs emergency services and just instinctively dials 911 it will redirect to 000. So tl;dr I think any emergency number will just redirect to the country you are in. I could be completely wrong as I'm just basing it on what happens in A... |
why is it that when you massage your own scalp/body you feel no satisfaction vs. the pure satisfaction when someone else massages you? | I assume it's at least partially because you have to strain your arm/shoulder muscles to massage something else, so you can never *fully* relax. And partially because physical contact releases endorphins.It may have something to do with our ancestors and their social grooming habits as bonding mechanisms. The things th... |
why is using cruise control more efficient than simply maintaining the speed manually? | Because the exact amount of engine revolutions needed to maintain that speed is being used. This means that provided you don't suddenly go up hill or have to make sudden changes in direction, the amount of fuel used is constant. When you drive manually you are constantly speeding up and slowing down based on the pressu... |
Why are animals that are much stronger, faster and can easily kill us afraid of us? | I don't know about easily. Intelligence beats strength, and a lot of animals are cautious of things that could be a threat. You lose some teeth or claws in the wild and it could spell the end. |
How does Netflix stay in business? | You have to consider, that they could pay back the debt with their returns, but they make even more money reinvesting that debt into production then paying back the money to the banks. If you owe the bank 100 million and they're charging 8% interest you could pay them the 108 million back, and that's that or you can pa... |
Why are gold, silver, gemstones, etc. considered valuable? | Gold is very hard to counterfeit, because of it's very high density. It's also very stable . Characteristics like those make gold a very good currency when there's no trusted authority to back something else. |
Why does fire turn from orange to blue the hotter it gets and why is the sun (a very hot thing) stay orange? | The sun looks orange to yellow but it's really white. It looks orange for the same reason the sky looks blue. White light is made up of all the colors in a rainbow, but the blue and violet get scattered more heavily, and so when you look at the sun, most of the blue light has basically been washed out, leaving the more... |
Why just landing on the moon is a big deal and how will it benefit us? | back in the 60's, it was a big waste of money. but it was deemed worthy because it was a dick waving space race with the commie Soviets. & #x200B; a good reason for going to moon is using it for either mining or scientific research. ISS already does alot of research in this area. but a continuous resupply mission to th... |
how do people know which mushrooms are fit for consumption and which are poisonous | By trial and error, but carefully. How do you eat food carefully: [_URL_0_] Plants are not usually either definitely fatal or perfectly safe. You start with very small amounts and test them in various ways. If it is bad or you react to it, don't eat it. |
why do you need to bring your temperature down? | This helps increase immune system activity and decrease viral infection rates, but it's also dangerous. Your central nervous system can only function properly in a very narrow temperature range, and keeping it too hot for too long will cause permanent damage. A low grade fever is a normal part of the immune response, h... |
Why does soap clean your body and yet make the shower filthy with grime at the same time? | Soap clings to the dirty stuff and makes it easier for it to wash off. The soap isn't perfect and can drop the dirty stuff in the tub. i think |
How does the 5th amendment work and why is it not taken as an automatic admission of guilt? | The state can't torture you to get a confession. The state can't trick you into confessing to another crime while you're testifying against a different criminal. The state has to try to convict you based off other people's testimony. |
What determines music taste? Why are some sounds or genres more pleasing than others? | I think it all boils down to music you relate to. So you will be attracted to similar music. There's also the understanding of a genre. Once you understand it and can see patterns or know how different sections are made you appreciate them more. It's also why you can like vastly different genres |
What causes ripening fruits to change color? | Really ELI5: Fruits change color as they ripen because the chemicals inside of them are getting them ready to feed the seeds inside. Thorough explanation: i actually don't know much more than that, just that it has to do with enzymes and such |
why the more blades on a propellor is not better | Welp yes, but actually no. The more blades on a propellor the more surface area you have. This means that yes you would have more thrust, but you would also have more drag. More drag means that you would need a bigger and stronger engine or motor to spin that propeller. Adding larger engines increases weight and larger... |
Why is ingesting nicotine toxic but we can smoke cigarettes constantly? | You know, injecting heroin is actually less of a direct rush than smoking it. Lungblood gets to the brain faster than that in the arm. Injection is just less wasteful for the homeless guy who doesn't have a lot of heroin money. You could eat as much nicotine as is in a cigarette and be fine. You'd get maybe even less o... |
why are housecats terrified of getting wet, when their instincts include catching fish? | Cat fur gets heavy when it gets wet. Imagine wearing a wet tshirt that you can't take off untill it dries. Also, unlike dogs, cats can't shake themselves dry, the only way they can get the water out is to lick it out. |
What exactly makes McDonald's hamburgers so unhealthy. | Sauce mostly. It's also generally accepted that the burger will come with cheese, and fries, and a soda, leaving the consumer with few daily calories left if they want to avoid weight gain |
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