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When you're flying in an airplane, why does it look like the cars or waves are staying still and not moving? | You have a fixed field of vision and part of your perception of speed is based on how much of that field of vision an object moves through in a given amount of time. If you stare at a wall 5 foot away and 10 feet wide, then a baseball moves across that wall in 1 second, you'd think that object was moving really fast be... |
why do camera flashes turn on for a second before turning off again and flashing for just a moment when the picture is taken? | Mainly this is used for auto-focus, white balance, iso selection, etc. Imagine you're in a pitch-black room - the camera will be unable to focus, adjust white balance to the flash, and set the ISO appropriately unless it's able to illuminate the setting with the flash before taking the picture |
why we as a species don't try to populate the oceans instead of keep looking for stuff on the outer space | In Marshall Savage's book, [The Millennial Project], he proposes that the oceans would be an ideal stepping stone to colonizing space. |
Why is 110V the standard for electricity in the United States while in many other countries it's double (220V)? | We did it first, and everyone else copied. We're stuck with 110V for small appliances, but big suckers like washing machines, dryers, and refrigerators use 220V. |
How do Advil and Tylenol help with headaches and general pain relief, and does taking more make it work faster, last longer, or do nothing? | Advil is an NSAID which, as the name implies, counteracts inflammation and therefore, pain. IIRC, the mechanism of action of tylenol's analgesic properties are not well understood, but it is centrally-acting to the heat-regulatory center to treat fever. I suppose pain control just follows from there. Perhaps there is a... |
Why does sleep help relieve migraine pain when nothing else does? | As a migraine sufferer, myself, it's my opinion that sleep may be a psychological relief more so than anything else.Yeah I agree, sleep seems to help my migraines too. My theory is something to do with, when we relax our body goes into a different mode, one of relaxing and repair. Perhaps we are somewhat "resetting" ou... |
Does the world actually create any new water? Or is it 100% recycled? | A very small percentage of the total water on Earth is 'created' continuously, as likewise a very small percentage of the water is 'lost', both due to biological processes. A small amount of the water taken in by plants is used in photosynthesis, where it reacts with carbon dioxide to form glucose and oxygen. Said gluc... |
How does squinting help you see clearer? | First, your vision is blur because the surface of you eye has changed shape, causing the refraction of light to not focus on the iris. When you squint your eyes, the light doesn't come from many different directions but generally just one direction because your eyelids block out the rest of your vision, so the light do... |
if you put a sleeping person’s hand into water, they will piss themself. How does this work? | It's bull shit. Your body suppresses your urge to defecate or piss while you're asleep. It's fairly difficult to piss while sleeping in general. Some people do, however, claim that getting into a hot shower makes them want to go pretty badly, but it's hard to tell whether or not it's due to warm water or the sound of t... |
Why does no other animal come close to humans in terms of intelligence? | Follow up question: why does it seem like we're the only dominant species who have achieved what we have, especially in the short amount of time we've been on Earth? Dinosaurs roamed for a couple hundred million years just eating plants and each other.Well we got smart first so we killed all the competition. But dolphi... |
How exactly would a 70% income tax work? | The US income tax is progressive. That means people who make more money pay a higher percentage rate. Increasing the top marginal bracket to 70% would mean that people in that bracket keep only 30% of their taxable normal income . That top bracket is currently set at $500,000 per year for a single person. Setting it th... |
When a new computer has its battery fully charged and is properly shut down, 2 weeks later the battery is at 0%. Where does all that energy go? | All rechargeable batteries have a certain level of internal discharge, and leaves the battery in the form of heat, but not fast enough for the temperature of the device to heated up to a degree measurable by consumer equipment. On top of that, your laptop probably doesn't have a power switch that physically breaks the ... |
How do passenger train drivers ( for example Metra trains in IL) know which route to take to go from A to B everyday and who tells them this everyday, which track to use? | Train drivers don't decide to take this route or another, the dispatcher decide for them by setting the Switchs and signals in the correct way.m", 'Please flair this topic under the engineering categoryWe decide by sending command to move each point to set up a route. Drivers just go through the route which was set up. |
Is there an edge of the universe? | Basically, the light hasn't reached everything yet but that's from our point of view, move somewhere else, and it will look like everything is expanding from there. More reading: _URL_0_ |
why do all space launch pictures make the space ship look like it’s going in a full circle? | I'm not sure what you mean here, but rockets don't go straight up. They turn and twist to go 'downrange' in order to reach their intended orbit. Often, the long exposure will include the ditching of the first stage and/or second stage. In the case of SpaceX, they mostly land the first stage, which conducts a series of ... |
What do musicians hear through the headphones when "acoustic" with a band? | You'd be surprised at what you *can't* hear while performing on stage. In-ears allow you to hear whatever you want. |
How does bonsai even work? | The very short version: people prune the tree to keep it from getting bigger than they want. One part of that is pruning the growth above the ground - removing branches before they get a chance to grow too long/tall . The other part is pruning the roots - removing the long and thick roots limits how much the tree can g... |
How does grapefruit juice "amplify" drugs? | Think about it like a highway. The cars are the drugs and nutrients and they're getting shuttled around the city of your body to where it needs to go. Imagine a new express opens that only services big rig cooler trucks that deliver milk. Now all those cooler trucks are moving much faster, there are more cooler trucks ... |
- how do planes stay in the air? | Commercial air travel is statistically very safe. Others have described lift. I will add that modern jet engines are very reliable, and even a two-engine aircraft can make it over an ocean relying on only one engine if necessary. As long as the engines are pushing the wings through the air, lift is created. Air traffic... |
How does putting your foot on the car accelerator make the car move | Because no one's covered it, diesels don't have throttle bodies, so they either:A) Have the accelerator pedal attached to an injection pump which would just control flow/pressureB) Have the accelerator pedal attached to a sensor, and the ECU would not only control flow/pressure, but would also control injection timing |
Why does Downs Syndrome occur more than other trisomy diseases? | 21 is the smallest chromosome. Size of chromosome approximates the number of genes it carries. When you get conception with trisomy of one of the bigger chromosome such as 1,2,3, it will likely cause death because more genes in affected chromosome means it is more likely the screw-up is deadly very early on, maybe even... |
Why is silverware dishwasher safe but stainless steel like knives and kitchen shears rust when you put them in the dishwasher? | Knives and shears contain carbon steel which helps harden them. This makes it susceptible to rust. You also shouldn't put knives in the dishwasher for various reasons. If you put my knives in the dishwasher I'd punch you in the face. |
why does inhaling fizz from a freshly poured carbonated drink almost take your breath away? | It's carbon dioxide. You don't gain anything from inhaling that, so naturally it would make you feel a little funny until you get oxygenated air.Carbon dioxide makes you feel “short of breath” and makes you want to breath faster. It’s our body’s natural adaptation to regulate how fast we breathe in different environmen... |
reflections out of focus? | The reflection and the picture aren't the same distance away from you. If you're standing 3 meters away from a picture then the picture is 3 meters away, but your reflection is effectively 6 meters away from you - that's how far the light travels from you, to the glass, back to your eyes. |
Can someone explain this NHL phenomenon to me? | 1-3-1 tells you how many players are in each zone. Tampa Bay has 1 player in the attacking zone. 3 in the neutral zone and 1 in his own zone. It's meant to clog the neutral zone, slow the game down, cause turnovers and prevent the opposing team from playing a possession game. It's a neutral zone trap. Usually the playe... |
Why are borders between states/provinces/countries etc. all jagged and crooked and such, as opposed to straight and even lines? | Straight lines are often used when those that drew the lines didn't need to care about people living in those areas. In Africa it was because Europeans didn't give a single fuck about Africans. In US it's probably mostly because lots of area was unpopulated when borders were drawn. But most of the time, you can't just ... |
How do direction and orientation work in space? | Currently working on my masters in spacecraft dynamics, some of these comments are close but not entirely accurate. This should be split into two categories: spacecraft in orbit and spacecraft in interplanetary/interstellar travel. Most of my work has been on satellites in orbit so I'll stick to answering that. As othe... |
How can different fruits and vegetables grown at the same time in the same soil contain vastly different nutritional value? | Ask yourself this question. Where does the mass of a plant come from? If you say, the soil, you'd be wrong. The soil doesn't vanish. If it were true, a tree would create a hole in the ground equal to its size. If you say light, well light doesn't have mass. You'd need a nuclear reaction to turn energy into mass or the ... |
How does kinetic sand work? Also, how is it made? | A simple way to explain how Kinetic Sand works is that it is solid particles in a liquid supension. When you apply a low momentum to it the particles have time to move around each other and flow in the liquid. When you apply a high momentum to it the particles don't have time to move and bind up with each other. So if ... |
Why are some outlets installed upside down? | My dad has recently reinstalled a number of plug sockets as part of a wider doing up of the house. Sockets that will be behind units for elertronics have been installed 'upside down' as most of the plugs have the cable running down if installed correctly. By installing them upside down they can run straight up without ... |
Why did the US Never get on board with the rest of the world with the metric system? | They mostly didn't have a choice. Metrication was a big push during the French Revolution, and spread through Europe during the Napoleonic Wars by ramming it down the throat of the conquered nations. The US was already independent before the first of those, and was not subject to the second. European countries went on ... |
US healthcare budget and spending | I think your 2016 $3.2 Trillion healthcare number **is for all spending**, including private spending. [Here's my source for that statement.] The link shows $3.5 Trillion for 2017, but that includes all sources, not just the government. The best description of the breakdown of who pays: > The largest shares of total he... |
The economics of highly valued obscure collectibles. | What something is worth, and what someone will pay for it are two very different things. There is a difference between *worth* and *value*. Something with very little *value* could be *worth* a lot to you. For instance a sole remaining photograph of a loved one or a childhood stuffed animal. To find the *value* of some... |
Why is it considered ok to wash dish soaps, detergents, laundry soaps, etc. down the drain if those things are considered harmful to us? | Waste water treatment is a very complex series of processes - which is great, because there's a lot of stuff to remove from waste water. I'd recommend doing your own [further reading] if you want to understand the whole process. Basically: there's no *specific* process to filter out just cleaning chemicals. If water tr... |
why don’t drivers get car sick? | Usually, car sickness is related to a mental disconnect between feeling the movement of the car while sitting still. We didn't evolve to move while sitting still. Sitting in the front seat or being the driver can help minimize the disconnect by adding an element of control and providing a better veiw. The veiw helps th... |
What is the "nails scraping a chalkboard", "fork scraping the plate" feeling and why does it happen? | For me it's pulling tape from cardboard and some of the cardboard remains on the tape. Or peeling off paper stickers and only pulling off the upper layer. Man that makes me weak in the knees. On the other hand I'm not bothered by nails on a chalkboard or forks scraping on plates. |
- What is a comet and how does it travels so fast in space? | Comets are chunks of ice that are the leftovers from the formation of the solar system. Very few to none of them are chunks of broken up planet. The chunks that interacted alot with the rest of the stuff in solar system got smashed together into planets or wound up in the asteroid belt and thus got slowed down by the s... |
How did people back then during the sundial times keep track of time at night? | Even at night, the moon and the stars move across the sky. Astronomers would have instruments for measuring the stars. They would have a very good sense of the time of night. Even the common man could judge the time within an hour or so. We don't look at the sky much these days, but they would have. They would know whe... |
How is it possible for comets to continually “shed” themselves for hundreds, if not thousands, of years and never run out of comet dust? | Comets are mostly dust and water, and it's the water that sheds, but only when the comet is close to the sun. Comets spend most of their time far from the sun, so they only lose water for a small time each time around the closest approach. Comets are huge, so it can take a hundreds of orbits to lose most of their water... |
Why is it so much harder to balance on one foot with your eyes closed? | Touching on the other commenters post: your eyes help you orient yourself by focusing on distinct points. If you don't have those, you basically rely on your inner ear organs to determine your orientation. When Ballet dancers spin for example , they don't turn their heads with the spin movement but lock their heads on ... |
Why does Motion sickness get worse when you look at a screen? | Motion sickness is the result of your brain getting conflicting information. The balance mechanisms in your inner ear as well as your sense of touch are both telling your brain that you are moving. But your eyes are telling your brain that everything is stationary. Your brain knows that *something* isn't right, since b... |
What does your net worth actually mean? If someone’s net worth is $50m, does this mean they actually have $50m to spend? | No. It means if they sold everything they own. Paid off alk there debt, they'd have 50m left over |
How does shutting down the government help anything? | Presumably this is in reference to the American government? I am in the UK so this question doesn't necessarily imply that. But I believe that the shutting down of the American government is a consequence of failing to agree a budget rather than a deliberate action. Basically it doesn't. |
If color is created in our minds and we don't know if everyone sees colors in the same ways, how do we know if our cameras and screens are color accurate? | The subjective colour and how we each view it is irrelevant, what is important is the wavelength and that is an objective fact. If there a light emitting a specific wavelength, maybe I subjectively see it differently than you in my mind, but we both agree that this wavelength is red and each time we see that wavelength... |
Why is most frozen food often bad for you? Is there a real reason most frozen food is high in sodium? | It really depends on the food. Freezing by itself doesn't make food unhealthy. Frozen vegetables, meat, and fish are all just as healthy as their unfrozen counterparts. It's when you start getting into junk food territory that things get bad, but again, no worse than their unfrozen versions. |
What would the consequences be of dumping our trash and single-use plastics into a volcano/multiple volcanoes? Would it be any better for the environment than what we do now? | A volcanoes wouldn't really be any different then just burning the trash. The trash is lighter then lava. It will float on top of it and burn. Releasing a bunch of nasty stuff into the air. besides that there aren't really any open air volcanoes that we could dump trash into. Volcanoes are usually covered up by a mount... |
Why can't we digest corn ? | A kernel of corn is mostly starches with a hard fiberous protective layer wrapped around it. The starches after they expand are popcorn. You digest the starches inside, but can't digest the wrapping layer. They're bags so they fill back up with smaller undigested food parts, but you got all the good stuff. |
Why does being wet in the open air make you cold? Even if it’s warm air? | Evaporation is what's called an endothermic reaction, meaning the reaction draws heat from the nearby area to take place. When your skin gets wet, the water will start to evaporate off, drawing heat from your body and thus cooling you down.It's the reason why we sweat, as the small amounts of water on our skin allow us... |
How’s it possible to pierce someone’s pupil and not cause permanent damage? | Optometrist here; That only happens in TV shows. If you pierce the optic nerve, you'll destroy the axons that make it up and damage vision. Retinal surgeries are usually done via an incision in the sclera. They do not go through the pupil. Behind the pupil, you have a natural lens. If you touch it with a needle, you'll... |
How do things decompose in antarctica? | In simple terms yes they will be preserved if any predator doesn't find that body. Long ansever is bit more complicated. Almost all animals in antarctic are carnivores meaning they eat meat so if any corpse is found it will be eaten in most cases and decomposed. There is also few bacteria living in those really cold en... |
How can anything apart from bacteria live in the bottom of the ocean? | In the same way that we evolved to go from ocean pressure to atmospheric pressure , things like amphipods found at the bottom of trenches went the other way, lower , and [evolved special proteins and enzymes that work better under pressure] _URL_2_ that ncbi link is not exactly ELI5, but is exactly what you're talking ... |
How do babies not drown during water birth? | They are already in water and when they are born it's a smoother transaction you don't keep them under its like as soon as they pop out you take them out of the water.. |
Why do temperatures drop significantly at dawn/early morning as opposed to midnight when the sun's not shining? | because it's still warm from the day when it was shining and temps need to drop. It's lowest when it's been dark the longest. It's darkest before dawn. |
How does something like this really work? | Yes, it is. The same properties of UV light that can damage your skin and lead to skin cancers also kills bacteria. Specifically, UV-C light exerts a powerful mutagenic effect, destroying microbial DNA, deactivating and destroying the cells. |
What is a derivative marketplace and how do people make money trading derivatives? | Everyone is talking about futures for some reason which is a sub-section of derivatives but doesn't explain the concept of derivatives. Derivatives are financial instruments that have no inherent value and rely on something else to 'derive' their value. There are many forms of derivatives but for ELI5 sake let's use fo... |
- how do Rorschach tests work? What are they? What can they tell you about a person? | The Rorschach Test, also known as the Ink Blot Test, is a type of word association exercise. Only instead of giving you a word for you to associate, they show you a series of pages with ink splashed on them, and ask you what you see. As with most psychology tests, there is no right or wrong answer, it's about parsing y... |
What is a yawn? | I think I've once heard is that when you're getting tired, you're breathing gets slower and you take in less air, you're body counteracts this by yawning to take in a lot of air at once and saturate your red blood cells to go around. As to seeing someone yawn and then you needing to yawn is just your body getting remin... |
Why do vitamins give you a ridiculous amount of % Daily Value? Why not give us 100% or 75%? Why 1,000% or more? | EmergenC does this because it is capitalizing on the false premise that vitamin C can cure or prevent illness Vitamin D is often sold at a high amount because the people who are deficient and need to take a supplement are deficient to the point that they have a *lot* of catch up work to do. The problem is that most peo... |
If I was constantly moving a constant 50 mph for 80 years, how much time would differ between me and a stationary object? How would I figure that out? | I'm pretty sure he meant time But I don't think that's necessarily physics. Is it? |
how we are able to get radio signals from places billions of lightyears away | Radio waves are just low frequency light. As long as they don't run into anything, they'll just keep going and space is mostly empty^^^[Citation ^^^Needed] . The strength of the signal drops with the square of the distance, but there were some pretty strong signal senders a billion years ago, and we have very good radi... |
The three body problem. | It's all about orbits. If you say that one of the two bodies is large enough that you can assume that it doesn't move, and the other small enough that you can ignore its influence, orbits are easy. Simple math. Even if you don't assume that, calculating how two items influence each other can be reduced to somewhat more... |
Why does a glass leave a ring of liquid on a table when no liquid has spilled? | Any time a beverage in a glass is colder than the air, you'll get condensation. As the condensation accumulates, gravity 'pulls' the water down the glass. Once the water reaches the bottom of the glass, it sits on the table, forming a ring around the edge of the bottom of the glass. |
Why is China so bad at football (soccer)? | As others have already pointed out, interest is very low in China. But to echo what another commenter posted, there's only about 2000 professional clubs in China. What does this mean? It means that there are very, very few places to get **consistent, professional training**. Training and youth development is always goi... |
What makes electric things vibrate? eg. phones, tablets etc. | Usually a little motor that spins something around really fast to create vibration. If you look in the handles of the clear video game controllers from the late 90s and early 00s you can see the mechanism working. It's pretty rad", 'Either a motor with half a circle on the end. As the half circle spins it makes the mot... |
Why does it make more sense for space rockets/shuttles to blast off straight up, instead of gaining momentum horizontally first, like a plane? Seems like a lot of gravity to fight. | You need to fight the gravity anyway. Disregarding inefficiencies, moving a mass upwards takes the same amount of energy whether you thrust forward and use wings to convert forward thrust into lift or thrust upwards directly. What a rocket really needs to do, however, is not up, it's accelerating to orbital velocities.... |
What are the implications of the newly discovered deep space radio signal? | ELI5 is not for current events. Questions like this are better in r/asksciencediscussion. TL;DR We can't know what it means until we find the source. |
Why do our shins hurt when we walk fast? | I've never experienced that. Are you sure you aren't just out of shape, shin-wise?", 'I get them, I also recommend good footwear and good stretches when you know you have a big workout. |
Why does China have such a fixation on small harmless nations like Tibet and Taiwan? | Because according to China Taiwan and Tibet are part of China. Any suggestion to the contrary implies that their respective revolutions were successful, and that it's OK for other bits of China to declare Independence without repercussion. |
How does the Taipei 101 damper work? | Imagine a building blowing in the wind a bit like pushing a swing. The swing wants to keep swinging at a certain frequency, if you push the swing at just the right point every swing, the oscillations get bigger and bigger. If you push at the wrong time, you'll be slowing the swing down as often as not. The perfect freq... |
why does spitting in underwater goggles prevent them from fogging up? | As it was explained to me when I was 5, the slime in your spit forms a film on the goggles so they can't fog up. |
Can you put the pin back into a hand grenade? | Yes, maybe. In most grenade designs, removing the safety pin arms the grenade Removal of the safety pin, by itself, isn't enough to make the grenade go off. The spoon is a lever that is holding back a spring loaded firing pin that will spring downwards when the spoon is released, striking a primer that will ignite a fu... |
What goes on during the aging process of alcohol, like wine and whiskey, that can’t be replicated with modern day technology’s? | I can speak for wine, as I own a winery in Northern California and am a career winemaker, with a university degree in winemaking . When wine, especially red wine, ages in barrel, there is a very slow diffusion of oxygen from the slightly porous oak staves into the wine. Since wine is acidic , it takes up oxygen pretty ... |
why is there a concern when current generations aren't "having enough children"? Wouldn't having kids be inversely related to a happy/healthy lifestyle, in regards to civilization? | Lets say that today you retire at 65 and will live to 100 - which is something that is very likely to be the case for people who are now retiring. Lets also say that on average people in your generation had 1 child. When you turn 100, 3/4 of the population will be retired , and 1/4 will be employed. That means that the... |
can sperm/eggs be cancerous? | Sperm themselves can't have cancer because they can't replicate on their own. What makes a cancerous cell cancer is that it is a cell that normally makes more cells, but the normal safeguards that regulate how often and how much a cell reproduces have failed. If you have sperm and they are left, sitting mature in the t... |
Why are seedless fruits called, well, "seedless fruits" even though they still have seeds? | . yeah it's not completely technically accurate, but the people buying them don't care so much for the fine points of biology , they just want to cook with them. and compared to the usual kind, the seedless kind lets you not deal with the seeds. |
How did the conflict in the Middle East start? | The question is a bit vague. There's been trouble for thousands of years. Even the Peloponnesian war was hardly the beginning of trouble in the middle east. Is it possible you're referring to United Nations Resolution 181, which divided Palestine into Arab and Jewish states? |
How do home schools work ? How is the syllabus set and how is anyone eligible to teach those subjects? Also how is there teaching validated? | One of the ideas behind home schooling is that there are no fixed eligibility requirements or are the methods used validated or accredited etc. The idea being you are being schooled at 'home'. You can hire private tutors, self study, be taught by parents/relatives - per my understanding there are no fixed requirements ... |
What is the difference in training that results in sumos being big, fat and strong, and wrestlers big, lean and strong? | Not a difference in training that's causing this. It's all food. In wrestling, cardio is pretty much the biggest factor , so being gigantically fat is not going to work. Sumo is super short bursts of energy, and weight really helps with moving the opponent and not getting moved yourself. That being said, some heavyweig... |
What causes a currency to rise and fall in worth? | On a related note. You can see the effects of monetary policy in mid-2000s Zimbabwe. The government decimated local production with their land grab policy so their exports fell dramatically. They were still importing loads of stuff and had to pay for it. So all their local currency went to buy foreign currency. It did ... |
How is skipping breakfast different to intermittent fasting? | It seems from browsing loseit generally that a lot of you do find great success with MFP/calorie counting, so I'm really eager to kinda hear those praises and if there are any tips |
Why do fingernails turn white when they pass your skin? | You squeeze the blood put of the capillaries under the nail which causes the fingertips to lighten. In fact, pressing your fingertips in this way is a good way to test your circulation. It should only take a second for the blood to refill and turn your nail back to it's usual color. If it doesn't, that usually means th... |
How do fuel pumps automatically stop filling up gas when filling up? | So the pump nozzle you put in the fuel tank when your filling up is in actual fact, two nozzles. Underneath the main large one which the fuel comes out of is a second very small nozzle. However that one is sucking in air as you pump. The reason for this second small nozzle is twofold. Firstly it lets the pump know when... |
How do you make money by buying shares in a company? | When you buy a share of a company, you're buying a small piece of ownership. There are a limited number of these shares. Let's say a Vandalay Industries has 100,000 shares available, and you own one of them, that you bought for $50 dollars. Later on, the company has had a good year. They decide that they are going to t... |
How do People Invent New Languages? / How did everyone learn the first language? | There are entire books about [Conlangs] such as Esperanto, Klingon, and Elvish, that describe different ways that people have invented them. But natural languages aren't invented, they evolve from other languages. For example, Spanish, Portuguese, and Italian are all rooted in Latin, while English is a Germanic languag... |
Is getting vitamins from pills equivalent to getting vitamins from food? Why/why not? | By and large, yes it's the same. It may not be the most efficient way to obtain those nutrients, but it's still possible to do so. Generally, people in most societies are not at risk of vitamin deficiencies. We usually get more that we need of most of them. Sometimes, societies fortify other common foods with vitamins ... |
Why doesn’t Canada ever have government shut downs? | Imagine there was no elected president and no senate. There was only the House of Representatives. After every congressional election, whichever party had the most congressmen - i.e. the Democrats or the Republicans - automatically got to fill the office the presidency with one of their own. In this system, the preside... |
Why are air traffic controllers represented by a union when they cannot strike? | It's more of the fact that without them, any traffic stuck in the air has no way to know if it's safe to land and where to go and what other aircrafts are in the arra. They need them there 24/7, which gives them more leverage. It's actually a very common practice to have a no strike/slowdown clause in union contracts. ... |
Why do children's TV channels have fewer commercials than others. | Because they're a declining market and the bulk of advertising towards their age bracket comes in the form of internet videos and shows like Ryan's Toy Review. Also, anything deem-able as educational gets all kinds of funding and reduces the need for advertising. |
Why internet speeds are calculated in mega bits rather than mega bytes? | Bits are the basic unit of information. In contrast, bytes are a specific arrangement/encoding of information that may or may not apply to what you're interested in - the speed of the communications channel. For example, across standard wired communications, you'll normally have 10 - 11 bits of information for each byt... |
How does the air in our atmosphere not get sucked out into space? | Gravity as well as the Earth's magnetic field keep the air in. But a tiny bit does escape to space, very slowly, near the very top of the atmosphere. Without the magnetic field, gravity would still keep an atmosphere but it would be thinner. The magnetic field helps stop a lot of the light from the sun from knocking ai... |
Why is the aspect ratio on photos and videos always different, even when shot with the same camera? | Aspect ratio is, at the end of the day, an artistic choice. Most cameras default to the aspect ratio that covers the maximum area of their sensors, but many have an option to only use part of the sensor and crop off the rest to get a different aspect ratio. A wider aspect ratio can give your scene a larger, more epic f... |
how has less than 10% of the ocean been discovered is 90% of it too deep? | We have been to the deepest place ), but the oceans are huge. We can't go to every place at every depth. Don't take the 10% too literally, different methods to count that lead to vastly different results.There’s also the needle in the haystack aspect. From what we’ve seen from the exploration we have done, there is not... |
If it takes the body 24 hours-ish to digest food, why do you have to use bathroom so soon after eating things like Mexican food? | Ahh doesn't it only take 6-10 hours to digest food?", 'Digestion only takes 6-8 hours. When you eat food your body automatically triggers peristalsis, which just means your body tells your intestines to make room for what you are currently eating. So if you eat a burrito and then 20 mins later have to go to the bathroo... |
Why do some flavors seem to blend together to make one unique flavor (think pb+j) while some flavors even when combined just taste like two separate flavors and don't work well together? | Chemistry is to thank, or to blame here. Here's a clip from Food: Fact or Fiction entitled [Opposites Attract ] that explains it better that I can.Peanut butter and jelly don't "blend together to make one unique flavour". What are you talking about?This reminds me of a favorite boss of mine who once complained that he ... |
Amperage, voltage, AC, DC in term of flowing water (since an electric current is a flow as well)? | The best way to describe amperage in water terms is more or less how much water flows through a point during a certain time span, so flow rate. Voltage is more or less the potential difference in altitude between to points in a river in water terms. DC is just a standard water cycle with evaporation, condensation and r... |
Why do Humans sweat after eating chilli or spicy food in general? | Basically it is down to capsaicin. Capsaicinoids bind to the TRPV1 receptor in mammals to simulate the body's response to overheating, resulting in sweating and other cooling attempts. However because birds don't have the TRPV1 protein they are generally immune from the effects of capsaicin. - _URL_0_ |
How come we have and crave different types of food for breakfast, lunch, and dinner? | I'm curious as to whether there is any correlation between what we crave and what our bodies happen to be deficient in. |
What motivates modern hunters? | Where do you think the meat in the grocery store even comes from? You argument is basically people shouldn't kill animals for their meat because other people kill animals for their meat. You either kill them for meat or you don't eat meat. Period. So either you pay someone else to do it for you or you do it yourself. A... |
Does Nebula actually look like that or is it just the camera? | Yes and no. There are true color images of only visible light the human eye can see, which are as colorful and vibrant as that - and in such cases you could say that is what the nebula truly looks like . BUT Those images are taken with very long exposure times. The camera shutter is often kept open for hours or more, c... |
Physics of free falling in an elevator | When the cable snapped the elevator would start falling. Since there's now nothing holding up the people in the car they would also start falling. During the time that both the people and the car are falling they would feel weightless, exactly the same as an astronaut in space. If they pulled the emergency brake the ca... |
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