query stringlengths 8 249 | answer stringlengths 45 7.8k |
|---|---|
How do we know that the stars we see at night are actually still there? | The largest stars live for hundreds of millions of years. Most stars live for BILLIONS of years. The stars you see with the naked eye are within a thousand light years or less. So even the shortest lived stars are not likely to be dying. And those also stand out, and thier age can be estimated. None are super close to ... |
Why does walking around negate the feeling of having a full bladder? | Your body has different modes and priorities. In different modes, with different goals, different pieces of information become more or less relevant. If you are sitting still, your body figures it's a good time to urinate so it channels the information about your bladder to your brain. If you start moving you have a ne... |
Why are Earl Thomas and Le’Veon Bell upset with their organizations? | Le'Veon Bell is upset because he outplayed his rookie contract and rather than being compensated with a long term, secure contract he has received the franchise tag three years in a row. He gets paid well with the franchise tag but if he gets hurt, he has no contract to fall back on. Running backs already have a short ... |
if gravity assists with the digestive system, how are the digestive systems of the people in a zero/reduced gravity environment like the ISS affected | Some animals are gravity assisted, such as some birds, which is why they throw their head back to swallow. If you want to prove this for humans, just hang upside down and eat a cracker. It's not easy but it's possible.When I was a kid, on the television show Mr. Wizard, he did a demonstration where he had his assistant... |
How do scientists determine distance to stars or galaxies | Distance is determined using Parallax. ever looked at your laptop screen with one eye, then changed to the other eye? what happens to the laptop screen? It seems to shift. the amount it shifts corresponds to the distance between your eyes, and the distance from you to the screen. You know the distance between your eyes... |
Why do motorcycles idle at lower rpm’s compared to cars? | It sounds like it because motorbikes have less cylinders and therefore the sound is more pronounced than let's say, a 6 cylinder car. |
The term 'overclocked'. If something can be over clocked, why isn't that just the new maximum speed? | The reason is that manufacturers have stricter standards than your average user so there's room for overclocking if you are willing to risk system instability. The other thing is that manufacturers clock their chips to work with the stock Heatsink Fan that they include with the CPU. A higher default clock speed would l... |
Why do public roads have toll booths to pay for them? Why aren't they paid for with taxes like other public services? | Some people get *huge* benefit from a highway while others don't use it at all. This means sometimes it's hard to get politicians to approve spending government funds on it — it won't be popular enough. In such cases, an alternative is to let users pay some or all of the cost, through tolls. Some other government servi... |
Why is it easier to remember music lyrics of thousands of songs or names of sports players but difficult to remember everyday stuff ? | Your brain is really exceptionally good at word association. Word association is what got us to this point in our society. Retaining words and names, as well as finding patterns in lyrics and poems is incredibly important, it let's you communicate and build a community You can exploit this capability as well, it's why ... |
how can something have 0 calories, yet 4 grams of carbs? | I actually called vitamin water's questions/comments number for this same question. I believe their answer was that the carb in question isn't actually used by the body . So it is a carb, but provides no energy. If you're bored, I'd call. They are very willing to answer your questions. |
why does your temperature seem to fluctuate so much more when you’re asleep versus awake (ie fall asleep freezing, wake up sweating, repeat)? | Your metabolism slows down before/when you're sleeping. It speeds up right before you wake up. Therefore you fall asleep and stay asleep at the point where your body is producing the least amount of heat. So you bundle up with blankets. In the morning when your metabolism gets moving again, you produce more heat, and s... |
how does a camera autofocus and know what to focus on ? | A camera is composed of a sensor and a lens in front of it. The distance between the sensor and the lens determines the distance at which a subject appears 'in focus', let's call it focus distance. The lens can move back and forth to change the focus distance. With manual lenses, it's up to the camera operator to chang... |
How did our ancestors walk around barefoot without hurting their feet? | Massive calluses. Our modern feet don't get exposed to bare ground often and haven't built up the calluses needed to not get cut up. Alternatively they wrapped their feet with rawhide or fabric", 'You seen that video of that bloke peeling a load of dead skin off his feet with a knife? Feet were like that. |
is it good or bad if stock prices go up/down? | It's good if the stock goes up. It means you investment in the company has increased in value, and that the company as a whole is more valuable. . In the case of Tesla, Elon Musk's recent behavior has been reckless and erratic, and that creates risk for investors. Investors don't like unnecessary, bad risk -- trying to... |
why is it freezing in space if there is no matter in the vacuum to transfer body heat into? | As many other comments probably already explained the science behind it. I'll give you the common sense ELI5. It's Hollywood bs, it would take long time for you to freeze in space. The only way your body gets rid of it's heat is radiation but then there's plenty of that out there to give you some heat back, so unless y... |
Why did the universe started in a low entropy state? | It may all boil down to the philosophical problem called the [anthropic principle]. Basically, the universe is the way it is because if it weren't, you wouldn't be here asking the question in the first place. Since entropy increases when things happen, if the universe started with already high entropy, nothing would ha... |
during the age of analog how did they get that stats on viewership of programs to award which ones are most watched ratings-wise? | A couple of ways - they asked people who represented different demographics to keep diaries of what they watched and later installed boxes in selected people's homes that recorded what the tv was tuned to. They then used that data to estimate what the whole country was watching. |
How is the energy collected by wind farms stored and harnessed? | I assume that the vast majority of the power goes directly to the grid, but there are massive batteries somewhere as a buffer. I, however think it would be awesome if the windmill, while spinning slowly lifted a massive weight up the shaft of the tower on a one way looped chain, then as the power was needed, their was ... |
how does a fit bit know when you are asleep and what stage of sleep you are in? How accurate is it? | Wow first time that I can talk about something I've worked on. I've worked on machine learning with sensory mobile devices . Generally most devices have only three sensors: an accelerometer, a gyroscope, and a clock. Using these three devices you can measure 7 different values at a given time . By gathering several dat... |
From a purely technical perspective, what has to happen for the National Wireless Emergency Alert System to send text messages? | > It seems to me that to send text messages to every device is a significant achievement. It's not a text message, at least not in the same way SMS works. It's a broadcast message to all cellular devices that are registered to a network . The alert is generated from its source . The alert is then transmitted via satell... |
Why can't freezers and fridges use the heat energy taken from stuff while cooling it but rather need extra energy for cooling? | Heat doesn't flow from cold to hot, without additional work input. The heat moved by the heat pump could be used to do work, at the expense of heating up the inside of the fridge . |
How do scientists cure cancer? | Cancer is a term for a wide assortment of maladies, but it all boils down to the same thing: your own cells are going wild and killing you. How this starts varies, but somehow, enough of your cells are damaged, and then they keep multiplying in that damaged state. That is cancer. To find a cure means to find a way to b... |
How does your body figure out how to use a painkiller? | It doesn't know in the least. The chemicals are designed to interact with ongoing biological and chemical processes in your body, in order to achieve a benefit. If you put a stick in the spokes of a bike wheel, it'll stop the bike because it is interfering with a process, even though the bike doesn't know anything abou... |
How does nuclear fusion generate energy? | Fusion is really really hot. I think it's been detailed better by others in this thread, but basically when two atoms fuse the new atom doesn't have as many subatomic particles as the sum of the previous two. Those surplus are converted to energy because E=MC^2 That energy is released in a variety of forms, but the imp... |
Why does being submerged in water feel significantly colder than walking around in the same air temperature? | Some things feel colder than others because of the conductivity of the material, just like when you are baking a cake and the metal from the oven feel a lot warmer than the cake even when both are at the same temperature. It's because the thermal conductivity of the metal from the oven it's greater than the cake. The w... |
Why haven't we explored the ocean? | Extremely high pressures make it prohibitively expensive to do much exploring. There also isn't a whole lot down there that's likely to lead to profit. Even if you did find something of value, extracting it would require the same sort of expensive equipment adapted to the high pressures. |
What's the difference between a router, switch and hub? | A hub is like radio communications over a single channel. If someone is talking on the channel everyone else should be listening. Most of the devices ignore the messages that are not directed to them. If two people talk at the same time both messages get lost, the maximum messages of the hub at any given time is one . ... |
What’s the difference between regular town police, sheriffs, and state troopers? They all seem to have the same police cars but what different jobs do they have? | City police operate within their city County sheriffs operate throughout the county, especially in the unincorporated parts . They also run the county jail system. State troopers are best known for patrolling the interstate highways within a state . They may also assist local police forces within the state with crimes ... |
Does inflation just keeping going forever/what causes it? | Inflation is the measure of the change in prices over time. The overall price of all items in an economy is determined by the product of the total amount of money in the economy and the speed in which that money is spent, divided by the total number of goods/services in the economy. The speed at which money is spent do... |
How come we can see highly detailed images of a nebula 10,000 light years away but not planets 4.5 light years away? | When you see those very detailed pictures of nebulae or galaxies that are very distant, you have to keep in mind that they are very large: most nebula are larger than entire star systems, and galaxies can hold hundreds of billions of star systems. There's also the matter of brightness: nebulae and galaxies generally pr... |
We are taught that plants grow through photosynthesis. Why, then, can pull all the leaves off a weed, leaving only a root and it grows back? | Plants don't require photosynthesis for energy. They often have a certain amount stored in the rest of their bodies to throw out new leaves. Not very many times in a row, but they can usually survive a de-leafing every now and again. Obviously in times of low energy it's more catastrophic . It's possible you also didn'... |
Why couldn't a rocket in space accelerate indefinitely with a constant force on it? | F=ma which means that a=F/m so when you apply a force to a mass, the force divided by the mass determines your acceleration. However, because A) fuel has mass and thus trying to carry enough fuel to accelerate indefinitely would result in the acceleration you get from the thrust getting smaller proportional to the mass... |
Why do some restaurants add an automatic gratuity for groups of a certain size even if the patrons ask for separate bills? | The automatic gratuity isn't only because it is a large bill. It is also because of the added difficulty on the staff of having a large table. The server has to take orders from more people on a single ticket. The kitchen has to time getting more dishes out at the same time. The bartender has to make more drinks at onc... |
What does non-ionising radiation mean? | Atoms have a bunch of electrons orbiting around the nucleus . Radiation is little particles flying around hitting things. Ionizing radiation means that the particles flying around have enough energy to push the electrons out of the atom's orbit. Non-ionizing radiation means it's not big enough or fast enough to knock t... |
How do the continents "break apart" after they've been pushed together to form a supercontinent like Pangea? | It's happening now in Africa, the Rift Valley is essentially where east Africa is splitting off from the rest of the continent. Continents may smash together in one area but then separate in another region due to currents in the mantle. |
How do people who hear for the first time with cochlear implants understand spoken language? | Very simply put, they don't. They can make an attempt at lip-reading, a skill they'll already be fairly good at, but if the speaker is facing away then it won't work at all. However, they will get used to it very rapidly. A few weeks to a few months and they'll be good to go in a language that they already knew . A few... |
what is different about upload and download speeds that makes ISPs give you fast download but barely any upload speed? | I think the idea is so that you don't try to run a larte server out of your house or use it to create a guerilla network. With limited upload speed both are impossible. |
Why do people get sick from viruses and sometimes die? Wouldn’t a virus want to keep a low profile and have the host alive so it too can live? | Most of the viruses that are lethal to humans didn't start off in humans. What happens is a virus mutates slightly, which allows it to jump from an animal to humans. It does the same thing it would in the animal, but in humans that causes lots of bad things and kills the human. Viruses are deadly to humans because they... |
How do teeth move around if they're attached to the jaw bone? | The bottom of your jaw is not attached to your skull. It's attacked by muscle and tendons. ie it's held up with string so you can move it with your brain. Edit: Oh you mean teeth moving like getting fucked up and falling out NVM. |
Why don’t prescription drugs ever go on sale, just like all other massed produced goods? | Because there's no incentive to lower price for the manufacturer or retailer. If you need a medicine, you pay whatever the price is, or you die/become sick/get worse. |
How come when we swim the water doesnt go to our eardrum and/or our brain | It does go to your eardrum. You will often experience muted hearing after swimming, and will need to tip your head to one side to empty the water out of your ear canal. It doesn't go to your brain because there is no route for it to enter your brain. |
How can general pain medication like paracetamol and ibuprofen treat so many different things? | Becsuse the dont treat the issue itself but rather act on the pain sensors in the brain. You just don't feel the pain. |
Where exactly does the upward force act on a rocket? | The force is spread over a relatively small area, but the forces are acting to compress the material the rocket is made from, so they can handle huge amounts of force. If the same force was applied as a shear force, a bending force, tension or even torsion, they probably wouldn't be sturdy enough.the gasses pressing on... |
How come when 3G was new it was cutting edge fast connection but now that LTE is out whenever I only have 3G connection nothing works at all? | For the large part, if your phone is falling back to a 3g service, it is an indication that it is unable to establish an LTE connection to the same towers. 3g bands tend to carry slightly longer, but at those distances the quality of the connection isnt great to begin with. 3g services aren't used as a primary network ... |
how is it possible dead artists still come out with albums post mortum? | Sometimes people have lots of things already which are scheduled for release at a later time, or they may have already recorded something that was in post production when they were killed. Since their part in it was already done it can still be released even if they are dead. Other times they may have created something... |
When a flight is overbooked why would someone need to be removed from their seat to let someone else on? | It's generally what's going to be the cheapest for the airline. When a passenger is involuntarily denied boarding due to overbooking, then the airline has to compensate the passenger an amount of money that's based on how much they paid for their ticket and how much of a delay they will encounter to get to their final ... |
Why do computers slow down and take longer to perform even basic functions as they age? | Your computer isn't a single tasker. It's multitasking. Every program you have running is available to be wanting to do something. So while you may have chrome in foreground, MacOS updater, Adobe Acrobat updater, time machine backup, etcetc are all running in the background. In addition, your cpu is auto controlled to ... |
Let's say America declared war on Russia (or vice versa), what prevents either side from just immediately launching nukes instead of fighting a long drawn out war? | Nothing. Nothing requires a declaration of war either. International norms and laws aren't worth very much especially when your country's existence is on the line. What would discourage it? The fact that your adversary would immediately respond in kind. If you fight a long, drawn out war with strictly conventional weap... |
Why do space shuttles need to launch vertically and not horizontally? | Space shuttles launch in an arc because they eventually want to be travelling perpendicular to gravity , so they don't really launch vertically, but I get what you're asking. & #x200B; The answer to your question has its own wiki page & #x200B; [_URL_0_] & #x200B; The pro's are exactly what you have said. The vehicle d... |
why do industrial engines (e.g. buses, semi, tractors, generators) use diesel instead of gasoline? | There are many good reasons listed in the other posts here. One more reason is that gasoline will only ignite in a very narrow fuel-to-air ratio, regardless of the load . Diesels can operate at VERY lean ratios, and air is free. This means when they are idling or under a steady cruise state, they only need just enough ... |
If oceans are salty and rivers are connected to oceans, how come rivers aren't salty? | Because the water only flows *toward* the ocean, so there's no path for the salt to move backward up the river.Rivers are salty it is just that the salt content is so low that it is hardly noticeable, the oceans concentrate the salt from the rivers - _URL_0_ |
Is it possible to obtain "raw ATP"? What would happen if one consumes it or has it injected into the bloodstream? Could it substitute other forms of food or be more efficient? | ATP is, traditionally, inside your cell. When one of your cells die, they pop and dump their contents. This includes potassium and ATP. Obviously, your body wants to know if cells are dying, and it's adapted to learn that a sudden rise in extracellular ATP is a sign that badness is happening here. There are situations ... |
why is water the only liquid the expands when it freezes? | Silicon, bismuth, germanium and antimony also expand when they go from liquid to solid; water is not the only liquid that expands when it freezes. In case of water, it expands because of hydrogen bonds that get formed between H₂O molecules when settling; those bonds force a crystal configuration that's not as compact a... |
Is there a reason nature chose to make penis a "blood sponge" instead of a proper muscle? | I think that in order to flex, skeletal muscles need to be attached to a bone on each end. Therefore, a skeletal muscle couldn't flex and stick straight out from the body. If it contracted, it would just pull itself closer to the body.If the point of life is to spread genetics in some global competition with every othe... |
Where does the stomach turn from gas to liquid? | No– it's more like a water balloon that can be more full or less full, but it never has much air in it. It's drawn partly-full-of-air because that's how the artist shows that there's liquid inside, even though the picture is very misleading in this regard. |
What is the point of suspending students who skip school? | By suspending them it shifts the burden of responsibility back to the parents who might be more effective at changing behaviour. If they're not going to be there anyway, listing them as suspended also reduces the truancy statistics for the school.They probably just have a protocol they need to follow, my school would g... |
Why do our eyes wander around when thinking of words to say in a conversation? | This topic hasn't been studied much, but it is speculated that the ability to scan the long term memory is built upon the neural system that scans the environment for information . So it's probably an evolutionary thing without obvious explanation. If you google it, you will get tons of results mentioning NLP. That's b... |
Why does it cost money to get elected to office in the US? | The offices that cost a lot of money represent a lot of people. You can run for a local judgeship pretty cheaply. In order to represent a lot of people, you need a lot of votes. Somehow, you need to get a lot of the voters in an area to know who you are and why you would be good at the job you want. Most voters don't s... |
Why is The Office (US) Still Popular, Today? | Because it's genuinely good television. With it's awkwardness, improv, and humor it just brings something new to the table every episode. It's easy to watch, and even easier to binge. |
Why does installing files take longer than uninstalling files on computers? | You want to play a game of Chess. First you have to set up the board. You take the pieces out of the box, carefully identify the piece, figure out where it should go on the board, and place it in position. This all takes time. You've finished your game, time to pack away. You pick up and 'v' the board and let the piece... |
how did Latin die, and how is it not spoken anywhere in the world given the size of the Roman Empire? | Latin didn't die so much as it evolved. After the Roman empire collapsed Europe entered the Dark Ages and Middle Ages where communication and travel was a fraction of what it had been in the past creating isolated communities and nations where once had been an empire. Over the course of hundreds of years Latin words we... |
Grading on a Curve - What is it and How does it Work? | They take the list of the grades of your class and they create a normal distribution out of it. They then divide that distribution up into people who get the final mark. It's really easy to do and it prevents everyone from either passing or failing due to a professor that marks too easily or too harshly.This system is ... |
Where do files go once they’re deleted? | Technically it doesn't erase anything when you hit delete. The filename is removed from the filesystem table and the space taken up by the file is marked as empty in the file system. The actually data of the file remains in place until the computer writes over those sectors with something else. |
How do bonds work? | > I have a basic understanding of equities and Forex markets but for some reason bonds just confuse the hell out of me. If you buy $100,000 worth of 10-yr. US Treasuries at 3% and then trade them out, what are you trading? The rights to collect the full return? Yes. > What determines the interest rate Whatever the bond... |
What is a capacitor? How does it compare to a battery? What are it's advantages and disadvantages compared to a battery? | A capacitor is less efficient at holding a charge when removed from the circuit it's been installed in. Batteries can be easily removed from an electrical circuit without losing their charge. |
What does happen when you get dementia? What are the symptoms and why do people die from it? | The other answers are missing a key component, that dementia also has real physical effects beyond memory loss. First of all, there is a difference between typical cognitive decline that happens as you age and dementia. Dementia is a catch-all term for a variety of conditions that cause progressive deterioration of mem... |
How can aluminum foil, a metal, be in a 375 degree oven and not be hot to the touch? | When you touch a hot object, heat is transferred to your skin - in the process cooling it down at its surface. So the better the material you touch can transmit and store heat, the hotter its surface will be when you touch it. So for example, you can stick your hand into the oven, as long as you don't touch anything - ... |
How do all you can eat buffets stay profitable despite some individuals taking advantage by massively overeating? | Two words: Low Overhead. The actual cost of the food is low relative to the costs of the labor to cook and serve to order. Two people can bus a restaurant seating 50 people quite easily, and the kitchen has predictability and fewer spikes and lulls. You don't need as many people working. |
What is midterm election in the US and why is it so important? | The US Senate term is 6 years, and the individual seats are staggered so that there's an election for Senate every 2 years. The midterm elections take place between Presidential elections , and are typically seen as a gague of the American public's reception to the President's progress/agenda.Depending on if the Senate... |
Why are computers able to perform much more complex calculations than we are, even though they aren't as powerful as our brains? | Computers only do very simple single operations in chains, which can then form more complex calculations at as an end result. There are two main different types of instruction set which are RISC and CISC . Internally even CISC is still RISC, it just allows developers to select more complex tasks which are then internal... |
Why aren’t more nations putting huge weapons up into space? | 1. There's a treaty about not putting weapons in space 2. It's really hard to put something large in orbit. There are only a few rockets capable of getting a big weapons platform into orbit, and all those payloads get tracked so someone would notice if it was this massive satellite 3. Its not like we haven't thought ab... |
Why or why shouldnt we update windows? | Old windows let out cool air and head, making maintaining a comfortable temperature in your home difficult. Update to insulated windows and save on your heating and air conditioning costs. You're welcome. |
Why is that when there is a disturbance on an airliner, it is escorted by fighter jets? | Safety measures. They send them up in case the airplane gets hijacked, those are still 9/11 after-effects. They even do the same these days if there's a communication/radio failure with an airplane. Even though there's protocol for the airplane as to do what and when in that case, you can throw that guideline out of th... |
How does Carbon Offset credits work? Does helping 3rd world people to adopt a 1st world tools reduce carbon emissions? | During industrialization, developed countries gained a huge economic boost by burning coal and cutting down trees to make more farmland. This had an impact on climate change, but it was small because it was just starting, plus no one really knew, so they just did it anyway. Now that climate change is upon us, we don't ... |
Why do most car's speed meters go up to 200+ km/hr when the speed limit is only ever between 90-120km/hr at most? | Because racetracks are a thing, speed limits are not the same around the world, and speed limits change. There would be be a lot of cars guessing if they're going the legal 85 mph limit on some roads in Texas if their speedometers had been limited to the 55 mph federal limit of the 80s. |
Why is Columbus viewed as evil | Christopher congratulated him for defending the family". When news of what he was doing reached Queen Isabella , she ordered him to be stripped of his titles, arrested, and brought to Spain for trial. He was detained in the dungeons for six weeks before having his wealth returned to him and he was expelled from Spain a... |
What makes the SpaceX rockets form the huge plume in the sky when they launch and why don’t other rockets make something similar? | Here's what I found googling about it. What is happening is that the first stage is separating from the second stage. Typically in previous rocket designs the exhausted stage simply falls back down to Earth (well, pretty much. But in the Falcon, the first stage autonomously flies back to the launch area, meaning it has... |
what actual, day to day powers does England have over Canada as part of the constitutional monarchy? Is it purely symbolic? | Nominally none. England as a nation has no power over Canada. The Queen is recognized as the Head of State of Canada and as such must give Royal assent to the Prime Minister upon election as well as to sign all of Canada's Bill's into law. Although technically she has the right to refuse do to so, this has not been exe... |
What is the "United Nations" ? | The United Nations is basically a forum where every country in the world can come together to: a) Discuss and debate major international affairs b) Offer support and help for peacekeeping, humanitarian aid, and social/economic development in countries that need it. c) try to agree on some sort of universal minimum stan... |
Where did Wario and Waluigi come from? Why are their names and physical stats along the same lines of Mario and Luigi? And what are they in relation to Mario and Luigi? | Wario is a portmanteau of the name Mario and the Japanese word warui meaning 'bad'. It's also a clever misspelling of Mario with the M upside down, and Mario starting with 'War' He was introduced as the villain of Super Mario Land 2, intended as an evil version of Mario and has gone on to have his own spinoff series. W... |
Why do climate scientists predict a change of just 1.5 or 2° Celsius means disaster for the world? How can such a small temperature shift make such a big impact? | A 1-2 degree change in temperature is the average temperature. When you consider the size of the planet. The amount of energy needed for that 1-2 degree change is massive. Now. that extra energy is dumped into the system, causing chaos. You might think of a small child. Throw in some coffee, soda, and candy. See how mu... |
Why are many Japanese companies active in so many different, unrelated industries? Like Yamaha, which makes musical instruments and motorcycles | all sorts of strange conglomerates like that exist around the world. Sometimes its because of matched proficiencies or technology . Sometimes its just families/companies buying up random stuff where they see opportunity . EDIT: in Yamaha's specific case the CEO repurposed machinery used for wartime production into maki... |
How does Delta limit their free Wi-Fi to just messaging apps? | I'm not an IT professional, but there are different ports for any given IP address. Web traffic is port 80. iMessage also uses ports 443, and 5223. So they probably leave those open but make the max message size really small, so it's impossible to send something big like a photo.Typically each messaging app talks to sp... |
The latest fad is blue light blocking glasses to reduce eye strain from screens. Wouldn't it just be more effective just to change the color temperature on your monitor to reduce blue light? | That is true you can shift your monitor away from the blue color spectrum. However for gamers who may have to distinguish between slightly different colors sea between the close of a player and the bush he's hiding in Shifting the color also changes the variation so they may be the same color. However wearing the glass... |
How is Stan Lee only worth $50Mil? His IP has grossed billions just from the movies not counting comics and merchandise. | The bulk of Stan Lee's creative work for Marvel was done in the 60s when he was an employee of the company, and as such they owned all the IP he created outright. This was a very common problem with the industry up into the 80s - writers/artists who had created characters in the 30s onward did not own their creations a... |
why is it said that performing an emergency water landing in a plane are almost certain to fail, especially as there seem to be plenty of examples of people surviving. | That's simply incorrect. The US Coast Guard did a [study] and only 12% of water ditches led to a fatality. That's an 88% success rate, pretty darn high. |
What exactly do electrons do around the nucleus? | Heisenberg Uncertainty principle. Basically if you measure something as small as an electron due to our methods of 'observation' you can only really tell where an electron is or how fast it is travelling. They are in motion because we can measure their impact and momentum, they exist as both a particle and a wave , and... |
Why the SpaceX rocket trails look like this? | When the stage 1 rocket separates, it changes course to go back to launch pad. So it needs to be going at a reverse trajectory that doesnt match it's orientation. The rocket has to reorient backwards then fire it's rockets to reduce it's forward velocity and go backwards, then reorient so the tail faces the trajectory ... |
How are credit card interest rates calculated? How can I tell how much interest I’m paying? | So they are super complex but here's the basics. You buy x y z in October. Your due date is November 1 just for ease . You don't need to pay that off by Nov 1, you have a grace period . Whatever you don't pay by that second date gets hit with interest. However if you start adding on after interest starts and let it rol... |
Why are renewable sources not our major sources of energy yet? | still not as cheap/effective as non renewable sources yet. lets take solar power. it's only like 30% effective and costs a lot, is high variable in the output and can be undependable. so we still need power plants. cars? electric has range issues, battery production is costly and slow, infrastructure for charging is no... |
why do women draw on their eyebrows but men don't have to? | Its not just older women. The focus on eyebrows has been a big trend in the makeup industry as they frame your face. Many women do it now as a part of a makeup routine or if they dye their hair. Men don't wear makeup so don't see a need to fill in their brows. Its just a cultural thing. |
Why is space typically shown as flat? | Think about when you light a match and the fire that ignites all around the top of it.Thats how our universe is. Except it is much much bigger than that. To show it tho, it's easier to just put everything on a plate so we can see everything on a flat surface and see where they are relative to each other. But the univer... |
How is that Earth has an atmosphere? What is fighting with the vacuum? Why is some gas able to create pressure out of nothing? | Our atmosphere doesn't fly into space for the same reason YOU don't fly into space : gravity. The mass of the earth pulls on the molecules of the atmosphere in just the same way it pulls on you. All of the mass on or around the planet is gravitationally pulling on itself. If compression wasn't a thing all of the earth'... |
Why are Australia's vast empty planes simply not covered in Solar Panels to help with their power productions crisis? | The same reason they're not spinning up new gas plants - Money and maintenance. It's not like you just stick solar panels out in the middle of a dusty wasteland and that's that. They need to be continuously cleaned to deliver anything close to their rated output. |
why does sugar need stirring in order to dissolve in hot drinks? | Ok so we're going to zoom in really close on the sugar, so that we're looking at one grain. By itself in hot water, the grain will dissolve quickly because there is a lot of water all over the surface of the grain for it to dissolve into. If you put that sugar on top of a lot of other sugar grains, half of the surface ... |
What is radiation? How does it change the atomic structure of atoms? How and why does it go away after thousands of years? | Radiation is the emission of energy in the form of electromagnetic waves or particles. You most commonly see it as all light around you and the UV radiation that gives you a sunburn. The radiation that you are referring to though I imagine is nuclear radiation. The reason this radiation is dangerous is because it consi... |
I really truly don’t understand what “gaslighting” is, other than it is a form of psychological abuse, what is an example of such behaviour? | It's basically lying to someone so frequently and forcefully that you make them doubt their own recollection or feelings on something. It's often not just lying, but other forms of manipulation to make the person give up and start to accept the gaslighters distorted reality, but lying is usually at the core of it.The t... |
Why do washing machines have windows? | They don't all, but it's probably a combination of entertainment, convenience, and troubleshooting. It's hard to know if it's agitating or rolling properly without a window since now the doors lock while it is running. In the old ones you could open them while they were running. Also, having a window can give you a vis... |
Why dont we stuff nuclear waste back into the already radiated uranium mine? | The most concentrated Uranium mine is about 13% uranium, with most being closer to 2-3%. This means for every square meter of rock there's about a coffee cup worth inside of uranium scattered through it. This is far from pure nuclear by-product which in part isn't even uranium anymore but other radioactive material. Br... |
How does specific impulse measure rocket engine efficiency? Why is it in seconds? | Specific impulse ends up in seconds because of how the math works out. It's impulse per unit of fuel, this turns into Force x Time / Mass = Mass x Acceleration x Time / Mass which has units of x seconds / kg reducing down to just seconds It's quirky but just treat it as a comparison between engines. An engine with an I... |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.