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Why is it more common to have colorful eyes (like blue or green) in northern countries? | Light eyes are caused by specific mutations in the genes that produce melanin ). The mutation for blue eyes happened spontaneously 6000-10000 years ago around the Black sea and spread into Europe as humans migrated there. They've traced blue-eyed people from all over the world back to that one mutation. So it's probabl... |
Why is Hunter S Thompson popular | I think he came up with a new style of journalism in the 1970s that was fresh and unique. It is still very popular today. Before Thompson people would report on things in a distant, dry, detached manner. They would write about events from the outside in an attempt to remain objective and stick to the facts. But Thompso... |
How come we can see stars millions or billions of light years away, but we are still unsure if there is another planet inside our own solar system? | Same reason I can see a building on fire the next town over, but can't spot a grain of sand the other side of the room. It's a matter of ~~scale~~ size and ~~luminosity~~ how bright something is. |
What's happening when someone wakes up from surgery/a coma/head injury and knows a different language? How would it be possible for someone to materialize knowledge of all that vocabulary, and sentence structure? | What usually happens is that the person speaks a particular language natively, for example Spanish but also speaks English. The knock on the head causes them to only be able to speak one of those languages. They already know the language they just aren't able to translate or speak the other one anymore. |
Why do airplane emergency oxygen masks have bags if they are meant to not inflate? | The bag is essentially a reservoir for you to breathe a higher concentration of oxygen out of. A small oxygen tube just can't supply as fast as a large breath. Think of it like a water fountain, you can only drink a small steam of water. If the water fountain was filling a bottle you would be able to large drinks and t... |
Why do modern cinemas still use projectors? | I think you're confusing different things. A blu-ray player doesn't display anything, it just reads data from a Blu-ray disc, decodes it and transmits the decoded data over an HDMI cable. You still need a device that actually displays the movie. A projector isn't limited by the size of the display. The farther away the... |
Why is it called first aid? | Because it's meant to be the immediate first response to an injury. Literally the first aid the injured person receives. |
What would happen if the sun disappeared? | Almost every animal would NOT die from lack of oxygen, as there is too much already available and few processes depleting it fast enough, especially once nearly every land animal starts dying from bitter cold they're not adapted to, complete darkness disrupting their hunting ability causing starvation, or dehydration/s... |
How does communicating to rovers all the way in another planet work and how can we control it from so far away? | The rovers have really sensitive antennas that need to be pointed straight at Earth. They can also communicate with the satellites in orbit around Mars. Back on Earth, we use really bigass radio telescopes to receive the weak signals that the rover/satellites send, and then we blast much more powerful signals back towa... |
How can the tides of one place have a difference of one or two feet, while in some places the tide difference is nearly forty feet? | A big reason is the specific local geography. As the whole ocean goes up and down, it goes in and out of bays, estuaries, etc. As the bay narrows, you have this rush of water which can't just stop in an instant . It has to go somewhere , so it literally piles up on top of itself. The funnel shape accentuates the tides.... |
What is intermittent fasting? I've been seeing posts describing they lost a ton of weight by doing it, can anyone explain? | One of the other things that IF does is dramatically raise the amount of HGH that your body produces, especially if you're male. This starts happening between 12-16 hours of being in a fasted state, but it keeps happening until you're about 5 days into a fast, IIRC. This probably happens because of lower levels of insu... |
In 3D engines, why do spherical objects get split into polygons instead of being defined as spheres? | Many 3D engines are designed for general models, where exact spheres are rare. While the math for an exact sphere may be nice, other smooth surfaces are much more difficult. So another possible reason to not include that is simply because it doesn't make sense to make so much effort implementing the software for someth... |
How can one feel someone staring at them? | When you turn around and freak out, it makes people more likely to look at you, because you're doing something interesting. If you turn around slowly, you'll usually find that no one was looking at you at all. The sense someone is staring at you is entirely internal and has more to do with your anxiety than any externa... |
Why does the charge of one atom determine how many atoms there are of another element in a molecule? | > When they combine, BECAUSE oxygen has a -2 charge, that means there are now two hydrogens in the molecule. No! If you have one oxygen and one hydrogen when they combined they would form HO, and the oxygen would still have a -1 charge that it wants filled. When it gets another hydrogen it forms H2O and it is stable. T... |
Why VR games need way more power than other games? | First off, stereoscopic vision requires two images, and putting the screens a few inches from your eyes means you need pretty damn good resolution so that's double the graphics power required right there. That's the obvious well-known issue. Double the picture require double the power, more or less. The less obvious bu... |
Would there still be a sonic boom if what ever was traveling beyond the speed of sound made no noise? | The sonic boom has nothing to do with the noise the object makes. It's solely from the object traveling faster than the local speed of sound. A supersonic jet doesn't make a sonic boom because the jet engines makes noise, it makes a sonic boom because it's traveling faster than the speed of sound and thus creating a sh... |
How is it possible that ALL world economies are “in debt” simultaneously, and to whom are they indebted? | Today I need $10 and I'm not sure when I can pay it all back, but definitely within a year. We agree that I can borrow it from you today and agree to pay you back in 1 year. A month from now you need $5 but you can pay it back in 2 months, and I still have $5 that i need back in 2 months, so you borrow $5 from me and a... |
Why do railway tracks have stones around? | Ballast does several jobs. & #x200B; 1. Maintains track position, by its very nature, formed and compacted granite is hard, and resists lateral and vertical loading2. Allows drainage3. Cheaper than laying it in massive slabs everywhere4. Maintainable, your slab cracks and you're screwed, your ballast moves and you can ... |
How do divers manage not to sink even though they carry a heavy iron tank? | The tank isn't that heavy and being in water makes people and objects buoyant (they float in water because they are less dense than the water. Water is really heavy as you know when you pick up a bucket of water something has to be heavier than water for the same volume for it to sink in it, divers often have to either... |
How do anti-tank weapons kill tank crews after penetrating armor? | Depends on the round type. Some bounce around inside, some release an explosive. Also, shockwave/ shrapnel is an issue because humans are quite squishy and don't do well in those situations. There are a range of very good YouTube videos and documentary on the subject but I'm on my phone and as a five year old that can ... |
If the vacuum of space is a thermal insulator, how does the ISS dissipate heat? | There's no air to conduct the heat away using convection, but the ISS is still able to get rid of excess heat via infrared radiation. |
How do they come up with names for new medical conditions? | There are a couple of different ways. This one is to name a new disease after the first patient diagnosed with it, like Lou Gehrig's Disease or Asperger's Syndrome. Another common technique is to give it a descriptive name, like acquired immune deficiency syndrome. Eventually, if the disease is caused by a pathogen lik... |
What's the difference between suntan lotion, sunscreen, and sunblock? | It's all based on the level of sun protection. Suntan lotion generally has an SPF around 8-15 It protects against the more dangerous rays, but still allows your body to tan effectively. Sunscreen is usually in the SPF 30 range, and meant for lower-exposure days or for those who are in higher exposure areas but also wan... |
What’s the difference between shampoo, body wash and facial soap. | Facial soap tends to be more gentle than body wash, as the skin on your face is more sensitive to change than, say, your arm. Facial soap will have cleansers that don't react as strongly with the dirt and oil on your face to keep some of what's there around, as your face needs a certain amount of oil to stay healthy. S... |
Why does overheating makes computer performance lower ? | Most CPUs and GPUs are capable of monitoring their own internal temperatures and are capable of slowing themselves down to prevent damage. All modern computer, console and mobile device CPUs and GPUs are able to do this but for different reasons. Mobile devices do it for power savings. If all you are doing is checking ... |
How can the universe expand if it's already infinite? | Some infinities are big enough to contain infinitely more infinities within them. There's an infinitely infinite amount of room. Anyway, the universe expands, and everything gets farther apart. The further apart any two parts of the universe are from each other, the faster they grow further apart from each other. That ... |
Why is it important for websites to verify that you're not a robot? | Well I'm not expert but I think its because people have programs that constantly put out scams and malware to try and scam some one but take this with a grain of salt |
what causes the electricity to go out for just a brief moment when it storms hard? | There are smart breakers on most power lines If something trips the breaker it'll wait a few seconds then try again to see if the issue is gone, it'll do this a couple times then wait a few minutes and try again. If it can't clear the issue with these attempts then it'll stay off and you'll need the power company to re... |
How do game developers know their games will run on upcoming or unreleased game systems? | the game developers get early access development kits. likely they already have working hardware for the ps5 and the next xbox and switch. but nowadays game consoles basically run on standard pc x86 hardware so it's not difficult to port to a new system like it was back in the day when each game console generation ran ... |
Why are name brand foods usually better than store brands? Or are we just suckers for marketing? | My dad would always suggest that we buy Toasty O's instead of Cheerios because they were cheaper. When he finally did buy some we thought they tasted stale and every day that we had to eat them we told him they were bad and to never to buy them again. When the box was finally empty and their were cheerios in the house ... |
Why is it bad to "blank" fire a bow? to release the string with no arrow in it. | When you fire a bow all that potential energy you gain from tensing the string is released into the arrow - i.e. it's what makes the arrow go forward. Without an arrow all that energy is instead distributed through the bow itself which can cause it to break. & #x200B; It's particularly a problem with compound bows beca... |
When you're feeling unwell, why does 'fresh air' always make you feel better? | I would add to the said above. Feeling of freshness on your face or body involves a lot of external receptors, which moves your 'trouble source' mental point outside your body. You became more aware of your surroundings rather then inner processes. Contrast feellings from warm to coold and warm again also have soothing... |
What is credit card debt? | When you get a credit card, let's say with a limit of 350, you must pay a minimum on let's go with the 5th day of each month, say 10. If you miss the payment, you can get billed an additional amount, plus if you exceed your limit, you can get a percentage added on for charges. Something people do when they're desperate... |
If all planets were flat, including stars, moons, etc, how would that effect the solar system? | I'm pretty sure planets would be incapable of forming flat because of the way gravity affects celestial bodies.If you want to know what happens if all bodies suddenly were flat, they would instantly lose the majority of their mass, especially bigger bodies, and their gravitational pull would disappear, thus every body ... |
How are household taps/showers able to change (or allow the change) the temperature of the water coming through in mere seconds? | Simple. There's a valve in the faucet that's hooked up to both hot and cold water pipes. Adjusting the temperature setting on the faucet just changes the amount of hot and cold water it lets through, and it all mixes together as it comes out the tap. That's literally all there is to it. |
How does going to sleep help a headache/migraine go away when medicine won’t? | Well, it might depend on the cause of headache. Previous comments have already explained why it can help, but sometimes it doesn't. For me personally, if I have even the lightest of headache and go to sleep I will 100% guaranteed wake up in a few hours with hammering migraine. Essentially, a light headache for me is a ... |
What does the amygdala do? | That's still a subject of much investigation, but one of the things it appears to do is provide the emotional content of memories. Without the amygdala, you could still remember events and people, but there would be no emotional connection. Your mother would be just another person. Your dog would just be a creature you... |
Why is diversity a strength? | The point of any diversity is to increase the amount of point of view, which could make achieving your goal easier or the final product better. A basic example would be for example if you write a police show it could add a bit more emotion to the show if you had people of different socio-economic background so they can... |
Why do the Abrahamic religions not get along with one another? I'm not sure what the major differences are between them and why they disagree so much. | Because like all religions, they fundamentally disagree. But then again, considering all these religions were started by Abraham and his group of bros, who all went out into the desert together to mutilate their penis, I'm not sure why anyone takes these religions seriously. Long story short, they disagree on key facts... |
How do we know the verbal pronunciations of words and phrases from dead languages? | People have already explained the process, but I thought I'd chime in to say that a useful thing when deciphering languages is names. Since names are pronounced more or less the same across languages, if you know a name in one language, and see it written down in another, you can work out which symbols must correspond ... |
What does a Chi squared test do? | it tells you if the proportion of something in different sets of data is significantly different. for example, is the proportion of Republican voters in California really different than in Texas. or: 'is the proportion of iphone owners who are male significantly different than the proportion of iphone owners who are fe... |
How exactly is body heat produced via exercise? | We burn calories that we get from our food to get energy to our muscle, but like anything it's not 100% efficient, some of that energy is lost through heat. |
Why do some blood tests need to be done from a specific arm, when blood in the body circulates so quickly? | They don't need to be done from a specific arm. The arm is usually just the easiest and most convenient way to draw blood with a minimal amount of fuss.ICU RN here, and I have no idea what you’re talking about. Outside of blood cultures , there’s no reason to specify which limb a blood draw comes from unless there’s a ... |
Why can’t saltwater aquatic life live in freshwater and vice versa? | It has to do with something called osmosis. Water tend to go through semipermeable membranes, like cell walls or, say, a cellophane bag, when there is a difference in salinity between the sides. Try putting some salt water into a cellophane bag, and placing that bag into fresh water. Eventually the bag will burst. Do i... |
I don't know if this is allowed here but can someone explain how "Post Nut Clarity" works? (I am a 19 male so I just mean chemically) | I can't explain it chemically, but psychologically your sexual desire is kind of overwhelming. Like, wanting to have sex gets you the furthest from rationality. Once you're done, it's like all you ever wanted in life, all your desire have been fulfilled, so the desire gauge is back to zero and you're left with rational... |
What would happen to our environment if we killed all the wasps? (Not bees, just wasps) | Wasps are predatory insects. For starters we could see an increase in plant eating bugs. There would be no figs . I don't expect the world to end but it wouldn't make things more comfortable for humans |
Why are budget deficits good for.the government when there is recession? | Its not so much the budget deficit that's good. Its the increased spending, or lack of cuts in spending, that is beneficial. During a recession, economic activity, by definition, is dropping. To help offset this drop and mitigate it, the government can continuing spending at existing levels or increase spending to make... |
What determines the center of the world map? | Almost half of the planet's surface is taken up by the Pacific Ocean. Most human activity has taken place in the land masses on the other half of the globe, so it makes sense to use the Pacific Ocean as the dividing point. There are also historical reasons, namely that explorers tend to place their origin at the centre... |
How do ski jumpers not sustain injury when landing? Vertically it appears to be at least a 100 foot drop. | Low angle of approach, like how a plane doesn't land by just slamming into the ground at a 90⁰ angle. |
What does the game The Beginner’s Guide by Davey Wreden mean? | That is a complicated question, you can truly walk away from that game with a lot of different interpretations. Especially as analysing the game inevitably involves analysing Davey Wreden since he self-inserts as the narrator to offer his own interpretation, provide out-of-text information about Coda and is eventually ... |
Why are triangles the most stable shape in construction/engineering? | Already some great explanations for the triangle, so I'll just add that triangles are not always the most stable shape. It is mainly the most stable polygon. Another very stable shape is a sphere. This can be used to distribute a given load quite efficiently. This is the idea behind building a dome, such as The Pantheo... |
Why do fizzy drinks stop fizzing if they are added to alcohol? | Looks like two reasons - according to the same question on [Ask Science] Soda is supersaturated with carbon dioxide . Water holds a lot less Carbon Dioxide gas than Ethanol . When you add alcohol to a drink, the amount of carbon dioxide it can hold goes up, so you'll see a reduction in the number of bubbles. The other ... |
Why do you get so tired in office jobs? | Fluorescent lights and sitting in a cramp office with poor air circulation and possibly high levels of carbon dioxide doesn't make for ideal performance.You sleep only when you feel safe and are comfortable and fed. Basic physiology. If you have work to do, you aren’t usually sitting in one place, barely moving, and co... |
Why does the engine of a vehicle only require around 1-3 thousand rpm other than for accelerating? | Gears. Your engine is most efficient at a certain rpm range. In order to stay in that range, you have various gears. So, while your wheels are turning at twice the speed, your engine can stay at speeds it's comfortable with. However, in order to keep turning, it does need more force on each rotation. More force means m... |
How do poems written in foreign languages still rhyme after translation? Is the rhyming kept at the expense of original meaning? | Pretty much, yes. Sometimes it's a complete rewrite, retaining the meaning but hardly any of the words. |
Besides looking ridiculous, why is it that cars with a lot of horsepower can't tow while trucks with less horsepower can? | It's mostly the ability to control the mass once you have it moving. High horsepower cars are usually built fairly light. They don't have the frame strength to control or hold back the mass of a heavy trailer. Trucks are built with towing in mind and therefore aren't built light. Most have steel frames that go from the... |
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? | It's not that they can't build them it's that they don't want. The cold war showed to the world that nuclear weapon are different than conventional weapons and that proliferation of nuclear weapons would be a lot more dangerous for the whole world. Most countries promised to no build nuclear weapons and several of them... |
Why for most sports Olympic gold is the top achievement, while in boxing Olympic games are considered an amateur level? | To comepete in Olympic boxing you can't be a professional boxer. So for example Floyd marryweather, Connor McGregor, and Manny Paquiao would all unable to compete. As to the actually business reasons they keep it like that. I haven't heard solid reaosns and the Olympic committee are known to be hilariously corrupt so I... |
Why did people come to the conclusion that smiling in photographs was the best way to take a picture? | Smiling became a thing in photographs with the snapshot era. 'Snapshot' is a word that was invented to describe photos taken at home on personal cameras. Literally a shot taken in a snap. Like implying easy peasy fun times. Before that photos were taken in studios. People had to go to the studio and pay a nice little a... |
if someone is a citizen of 2 different countries, do they have 2 different passports? | Yes. Or, well. Sort of. Dual citizenship means that you are allowed to apply for a passport in two separate countries. And as a result, you can have two of them at the same time. The thing with a passport is that it is a document issued by a named nation that verifies that the bearer has a citizenship at a given date. ... |
Why does it take 24 hours for muscles to start hurting after a workout? Why not straight away? | I just had a patient with rhabdomyolysis. He didn't usually work out then decided to go for a health kick a hit the gym twice a day for a week. He advised he would get bad DOMS but took this as a good sign. He tried to work out all his body so he experienced DOM's all over . By the end of the week he was pissing cola a... |
Why is it common amongst animals to give multiple births but not in humans? | It has been observed that there are two major strategies for childbearing, lots of children with low investment in each, or few with more. _URL_0_ Humans evolved along the latter strategy. Evolution is complicated so it is hard to guess why, but from the wiki it looks like this strategy dominates in areas that are near... |
Why are prices/value in developed countries (US, almost Europe, Qatar etc) higher than other places? | Because the people serving you need to pay high prices for things like real estate, so they need to charge you more or they can't afford to stay in business at all. |
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? | It is primarily a distribution problem. In recent times, world production of food has been in excess needed to feed all of human population. Lack of local political will, corruption, conflict, poor infrastructure, misguided economic policies and fear of social unrest are all factors that play into the problem. 1) Poor ... |
Why do all the other rocky planets in photos look covered in craters from meteors, yet earth doesn’t seem to have any? | As others have said: Our atmosphere protects us. Our weather degrades old craters. Some MAJOR craters remain here, but some are so large we didn't notice them or they were underwater so we didn't notice them . |
How the poison in/on an animal doesn't harm the animal itself? | Toxins and venom generally do their dirty work when introduced in some way to the bloodstream or to some organ. Animals with venoms generally secret their venoms in watertight sacs behind their fangs, meaning the venom is never in contact in any way with the animal's blood or organs. If they accidentally bite themselve... |
why are solar-powered cars not a thing? think of the battery recharge on a sunny day sitting in rush hour! | Simply put, an electric car uses a lot more energy than a car-sized photo-voltaic solar panel can collect. You would need many *many* times the size of a car in solar panels to power just one electric car. You can't drive that around! Those panels would be better off staying put on top of roofs, over parking lots, or o... |
Why are there “acquired tastes”? Why do some things, like beer, whiskey, and food delicacies take a few tries to become palatable? | or even black coffee. because it takes time for your tongue to become sensitive enough to separate out the slight and subtle distinct flavors. when you try something for the first time, you just become overwhelmed and that doesn't give you a pleasant taste. but the more you try it, the more you're able to taste the sub... |
Why do gyroscopes remain upright, instead of falling or twisting in the direction of the spin of their gyro wheel? | Ok gyroscopes like your 5, this one's kinda challenging. So there's a concept in physics called momentum. If something is moving it's hard to get it to change how fast it's moving or what direction it's moving. As an example of this, look at when you brake in a car. You keep going and will move forward in your seat unt... |
Why is the current weather in Europe much more dangerous (at least as reported in the news) compared to other locations at similar latitudes? | Keep in mind that the weather in Europe is generally much warmer than in north America at the same latitude. If you overlayed a map of Europe on top of a map of North America while keeping the same latitude you would find that much of the temperate places in Europe and up in the frozen north in Canada and some of the w... |
why would the death penalty cost more per year than a system of life (in prison) without possibility of parole? | When someone's life is on the line it usually leads to longer trials and more appeals meaning more lawyers and more experts on both sides. |
How are there mountains, where there aren't any plate Boundaries? | There are various different types of mountains from volcanoes to Mesas which can be formed of solid rock which isn't eroded as fast as the surrounding softer rock. - _URL_0_ |
Why does water conservation matter in areas with plentiful rainfall? | In many areas with high rainfall, most of the water flows out to the sea via rivers. We often don't collect rainwater or river water and instead tap the water table. Even with high rainfall, water usage will deplete this water table. Once it's gone , we're extremely vulnerable to droughts.Here is actually a good explan... |
How do micro SD cards keep having more an more memory, yet stay the same size? | Moore's Law states that the amount of transistors manufacturers can put on an integrated circuit doubles every 2 years or so. This means you can fit more transistors into a memory card, increasing the amount of storage in the same sized card. Moore's law is predicted to slow down as science is getting down to molecular... |
how do they monitor speed by aircraft on highways? | There are marks on the road every 1/4mi. From a plane, they time with a stopwatch how fast it takes a car to get from one mark to the next. If speed limit is 60mph, it should take you 15 sec to go from mark to mark. Let's say they give you a buffer of 2 sec every car that goes mark to mark in less than 13 seconds, they... |
Why is it good for you to "air out" a cut or other such wound? | It isn't. Drying out the wound encourages scabbing, which encourages scarring. Better to keep it moist and covered. |
How can people eat gold flakes in dishes without health consequences? | Your body doesn't absorb gold. Basically, lead networks with calcium in your bones. Mercury disrupts a cell's ability to control oxygen tearing them apart. Gold doesn't do anything like that, though some people do appear to be allergic to it |
Photoshop. How does it work? | It's using the colors and light-dark values of adjacent pixels to calculate the replacement vales for the pixels you want changed. There's more logic underneath that, but that's the idea. |
how come when it's dark you don't see just black, you see what looks like TV static? | I personally don't experience this, it seems like it's a rare disorder. Might want to talk to your optometrist about it _URL_1_", 'I used to see this when I was doing psychedelics semi-regularly. It worked on blank walls too. |
How does a tax war on imports between 2 countries affect the rest of the world ? | The clearest and most direct impact is that it shifts the pattern of global trade. China makes goods and exports them to the US. But most often, China isn't the sole producer of such goods. Other countries like Mexico, Vietnam etc may make the same goods and also export them to the US. With the tariff, buyers may prefe... |
Why is the air cold when you fan yourself on a very hot day? Doesn't motion generate heat? | The hottest molecules give off their energy first. Some of the heat comes in the form of hot water molecules that have evaporated off your skin easier than cooler ones, and some in the form of bouncing molecules in your skin that have lost some energy in their collision with an air molecule. Some of the total energy of... |
Why do the police get to investigate the crimes of other police? Isn't that a conflict of interest? | Jurisdiction to investigate lies with the policing agency for the place where the crime/incident occurred. It doesn't matter who the person they're investigating worked for. That said, there are state and federal agencies that can investigate if needed. For example, if Corona PD contacted the State Police and asked for... |
Why is that if you fall asleep hungry you still wake up feeling more or less fine? | While you are asleep your body works to keep you alive and homeostasis up. Your blood sugar levels are tightly controlled, when it drops you start producing hormones to tell you that you are hungry and hormones to break down it's sugar and fat reserves to keep you alive. While you are asleep it's mostly growth hormone ... |
Why does our body feel tired after going to bed late but still sleeping for 8 hours? | Are you drinking? Alcohol, even a single drink will screw up your sleep quality. Do you have a sleeping disorder like sleep apnea? If this is a common experience, go get checked with a sleep study, of you're not sleeping, it's going to really mess with your quality of life.You brain has an "internal clock" where it rel... |
How do you create a country? | Pretty much with a military force strong enough to keep other military forces in the region at bay . Do so for a long enough time, and without pissing other countries off too much, and other countries around the world may eventually start to consider your country to be legitimate. You'll also need to set government ins... |
Tablet screens vs E-Reader screens | The touch part works the same way it works for an LCD. As for the display part, it's charged pigment particles suspended in an opaque fluid, that can be brought forward or backward by applying a voltage. LCDs can work in sunlight if they use a reflective backing, this is common in calculators. For more in depth explana... |
what's the difference between gas grades, i.e. 87, 88 "the new standard" and flex fuel? | Higher octane means it can be compressed more before self-igniting. However compression ratio is something designed into the engine, if you don't have a high compression ratio, you don't get any benefit from the higher octane. If you do have a high compression ratio, using low octane fuel can cause knocking. E85 is 85%... |
Why is it that, when someone tells you to do something, you want to do it less? | Because people like having a sense of freedom and control. When you want to clean your room it's out of YOUR choice but when someone else tells you to do it even if you were going to do it regardless then it suddenly takes that choice away from you and it becomes THEIR choice.A way to prevent a “resistant” reaction is ... |
Why does breathing out on a left foot, when running, prevent Stitch? | Former marathon runner here: You can get stitches for a lot of reasons. You might notice that even on a hot day yoir stomach can get cold during a long long run at slow pace. This is because your abs and digestive system are doing minimal work compared to the rest of your body so the blood is going elsewhere. This crea... |
Why don’t law enforcement officers use tranquilizer guns to subdue perpetrators? | You know in the movies where someone gets shot by a dart or injected with a syringe then pass out in 3 seconds, yea that is not real life. & #x200B; Usually even in animals you shoot an animal and it takes 5-10 minutes before it passes out and falls asleep. Also its pretty dangerous to do , if the dose is too low the a... |
What actually happens with those shredded truck tires on the side of the highway? Do trucks really just drive until they fall off, and how do they continue onward after losing a tire? | Unless it's a front tire, all the rest of the tires are dual tires so it doesn't necessarily affect the vehicle in a negative way right away. If it's a tire on a trailer the driver may not even notice. Even if he does, they generally don't carry the gear to change a tire as it's quite a process on a big rig. |
How are secret recipes still a thing with modern chemical analysis? | You could, for the most part. Perhaps someone has. But the natural flavors could be tricky. Chemical analysis won't really tell you all of the organic compounds in there in a sensible way. You'd have to draw some assumptions. And all of those compounds are important -- it's the reason that real berry flavors taste much... |
How does blood cell production work? Do the cells that have nuclei (like white blood cells) undergo mitosis? | Some other people have answered the first part of the question well. As to the part of whether they undergo mitosis, it depends what kind of cell you're talking about. Because RBCs don't have a nucleus, they can't divide. WBCs on the other hand can divide extremely rapidly because the body needs to be able to quickly r... |
Why do nuclear reactors rely on diesel generators in emergencies? | It's not safe to rely on the reactor running at the time of the emergency and continuing to be safe to run after the emergency. The safest thing to do is to power down the reactors to minimize the cooling needed and wait for repairs to the grid. Commercial nuclear reactors aren't meant to provide small amounts of power... |
Why airline prices fluctuate so much within a matter of a day? | It costs the airline the almost same amount to fly an empty plane as a full one, so they play games with the prices to make sure every flight is full of paying customers. So they give you cheaper tickets when you buy in advance because it's easier on them if they know that they've got someone partying for at least that... |
How can suicide be illegal? | It's mostly 1) trying to commit suicide will put you in a mental ward for a minimum of 72 hours. 2) assisting someone else to commit suicide is illegal . Obviously if you do not have assistance, and succeed in killing yourself, there's no one to punish. But, if any of the two above are true, there is someone who can fa... |
Does the breakdown of carbon life forms add mass to the earth? | The Earth is a jar full of soil air water and whatever. We live in the jar, are made from stuff in the jar and when we die we're still in the jar. The jar weights the same. Meteors are stones that fall in the jar from time to time they increase it's mass. There's something called solar wind it's made of some sort of pa... |
Why do pubic hairs get curly as it grows longer? | They just talked about this on a JRE episode and Jamie looked it up. Supposedly, they're curly to reduce friction. |
Why aren't TV shows that follow criminals, like drug smugglers, forced to hand over footage? | Forcing journalists to reveal their sources, you mean? That's not a path many civilised countries are willing to go down just to bust a small-time drug dealer.Aren't they "handing it over" by publicizing it? |
How did we learn to distinguish between toxic and non-toxic plants and mushrooms, and especially treat some toxic plants so that they become edible? | Effectively by trial and error. Some groups around the world still do this. Their method is to feed the oldest members of the family or community first with the new food to see what happens next. If they're alive after a few days then they give it a pass. |
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