query stringlengths 8 249 | answer stringlengths 45 7.8k |
|---|---|
How is calculus used in machine learning? | In my experience with programming apps that use machine learning I haven't used calculus before, and I'm pretty sure none of my friends have either |
how do people know which mushrooms are fit for consumption and which are poisonous | In large part they don't. They tend to eat specifically the ones which are easier to identify. There are large numbers of perfectly edible species which are almost never eaten because they're too easy to confuse with poisonous ones. |
How does touchscreen responds when we touch it? Why does it accidentally responds when we touch it with other specific objects? | Capacitive and resistive touchscreens are notably different. Things that have resistive ones are the nintendo DS, very old Iphone ripoffs etc. - almost everything else is capacitive. Capacitives gauge the electrical charge that you put on the phone by putting an exact amount of voltage in each corner of the device, all... |
How come there’s just 1 line of continuous bubbles coming from the bottom of the glass if you’re drinking something like champagne? | It's a common belief that the continuous bubbles in champagne are from imperfections in the glass, and it is true that this can cause/enhance the effect, but in actuality, the effect is naturally due to special tubular fibres in the drink that stick to the glass. The fibres in champagne are a different shape to those i... |
why do you need to bring your temperature down? | A normal fever doesn't need to be brought down and has some value because the elevated temperature causes immune responses to function quicker and causes some germs to function worse. However, a very high fever is not a normal response and means that something is going seriously wrong in the body. Excessively high temp... |
how do calculators actually work? | /ubus99 wrote a good explanation. If it's hard to wrap your head around, it might help to see someone build an adder, which they do with dominos in [this nifty video]. He also has a longer video where they constructed a calculator by hooking together multiple adders out of dominos, [which you can see here.] An actual c... |
Why does cold water intakes more CO2 than warmer water and it holds it better? | > Isn't a warmer/hotter water supposed to be more chemically active/reactive and therefore allowing for better reaction with CO2? Yes, and that's the problem. If the water is reactive, then it's already doing what it does with CO2 faster, and thus releasing it faster. |
Why, despite all milk producing mammals did human chose cow's milk? | This is a bit of a long story, and most of the other comments are only hitting part of it. To start with, people didn't drink milk from anything but people. Why? Because people didn't have any domestic animals. It's a bit hard to drink milk from a wild animal for reasons that should be pretty obvious. But people settle... |
Why can't surgeons just pull out huge chunks of body fat at a time with a glove or a modified vacuum hose? | Using their hand requires a hole in your skin big enough to fit their hand. This large incision would lead to scarring when it is stitched up. Liposuction uses essentially a modified vacuum that has a cutter to suck up fat tissue and snip it. Its nozzle is small enough so that it goes under the skin without a large inc... |
How can we determine about dinosaurs' looks just by their skeletal remains? For example, one cannot imagine humans having boneless parts like ears just by looking at their skeleton. | Yes, it is absolutely possible that we do not know how certain dinosaurs looked like. It is not just possible, it is reality. That is also why some new discoveries can completely change how we view a particular dinosaur because sometimes we get lucky and get information on a part of their body that we previously didn't... |
If you were able to shoot a bullet perfectly straight in the air , would it come down at the same spot or would the earth's rotation effect it? | There are a couple of factors at play here. First off, the Earth's rotation would affect it. The bullet is traveling sideways at exactly the same speed you are, but the bullet is farther from the center of the Earth, so it does not rotate as far as you do even though it is moving at the same speed. This would make the ... |
How does the 5th amendment work and why is it not taken as an automatic admission of guilt? | Whether you are guilty or innocent, it prevents officials from using your words against you and fabricating guilt. If you say anything, and that anything can be shown to be wrong, then that will 100% be used against you, even if it's just an innocent error in recollection. This is dangerous because human memory is not ... |
what's the meaning and difference between "Workforce Participation rate" and "Unemployment rate"? | Unemployment rate is roughly calculated by dividing the number of people unemployed by the number of people with jobs. Workforce participation rate is roughly calculated by dividing the number of people working by the number of labor aged people in the population. Some economists think that unemployment rate is a bette... |
What is Usenet? And how does it work? | Used to be an online forum like reddit with different subreddits and even subreddits of the subreddits before the world wide web. Back when the internet consisted of email, ftp, usenet. Then gopher and irc came along, then eventually the www. Now most isp's don't support it anymore but you can pay certain ones for acce... |
Why do places with hot climates like spicy hot foods more. | I've heard it is because in hot climates food spoils more quickly, so they'd use spices to make the spoiled food more edible. In reality it is probably because most spices grow more easily in hotter climates.And I thought it is because when you eat spicy you sweats more. This means more water on the skin which condensa... |
What determines music taste? Why are some sounds or genres more pleasing than others? | I remember doing a paper on frisson as an undergrad, and I came across quite a bit of literature on this. It's out there. Very basically, I think a lot of it said that music taste is cultural. That is, the type music you listen to will be heavily influenced by what your family/friends/society listens to. Sort of a no-b... |
What causes ripening fruits to change color? | Just want to add that it would be also be evolutionarily advantageous for the fruit to display these colors because animals might come along, see the ripe color of fruit, eat it, and poop it out somewhere else in the forest where the seed has a better chance to become another tree—thus replicating the fruit tree's gene... |
why the more blades on a propellor is not better | Two things to consider here: Firstly, adding more blades doesn't just add more lift/force, it also adds more weight & drag to the propellor, making it harder to turn . There is a balance to be had between more surface area/more blades and weight. Secondly, when a blade moves through air, it leaves a wake of turbulence ... |
Contra-Rotating Propellors, Please! | This is a bit oversimplified, but generally, contra-rotating propellors do more to improve efficiency than power. As you said, there is only so much air in the vicinity. Sort of what happens is that the first propellor imparts a lot of spinning motion on the air, as well as pushing the air backwards. This is not ideal,... |
Why do children fight the urge to sleep? | not an answer but I had to laugh so hard when I saw this; I'm a grown ass person sitting in front of the computer in the middle of the night and just not going to bed even though I'm super tired because? yeah, about to find out! |
Why is ingesting nicotine toxic but we can smoke cigarettes constantly? | Nicotine is toxic, it does t take much to kill someone, it's estimated about 60mg _URL_0_ The actual nicotine in a cigarette is about 8-20mg but very little of it is actually absorbed by the body. |
why are housecats terrified of getting wet, when their instincts include catching fish? | Housecats are descended from desert cats of the middle east. Deserts get very cold at night. A wet cat could easily freeze to death. And that's probably what happened to a lot of the ones lacking that instinct. So the housecats we have today still have that instinct. |
Why should we eat vegetables if we can get the nutrients they provide from supplements? | A person can live their whole life without eating vegetables and avoid nutrient deficiency syndromes by taking supplements. Vegetables are just *recommended* by nutritional experts. One major reason is because vegetables are not calorie dense but still take up space in your digestive system and help prevent hunger and ... |
Energy can be inter-converted in a lot of ways. Why not between angular and linear momentum? | First, don't confuse momentum and energy. Momentum has direction and strength that cannot be changed, while energy only has strength that cannot be changed. Now, the short answer is that momentum is always conserved. In, say, a spinning wheel, the linear momentum is 0 because half of the wheel is going one direction an... |
What exactly makes McDonald's hamburgers so unhealthy. | Most people who eat at McDonald's do not have the 'hamburger'. They have a specialty sandwich, usually with fries and a drink. The quantity of saturated fat, sodium, and sugar in such a meal represents a significant amount of the RDA of all those nutrients. One hamburger patty on a bun, no sauce, no cheese, no fries, n... |
have languages for animals developed over time similar to that of human beings, or say can a lion in this time communicate with a lion five hundred years ago? | The brain in most animals isn't developed to make sense out of language the way we do. You can communicate with many of them by commands, sounds, and gestures, but stringing together words to form coherent sentences will be meaningless to absolute most, if not all animals. A lion will probably use the same few means of... |
What exactly was the watergate scandal and why did it kick Nixon out of office? | 1n 1972, the Democratic National Committee had its headquarters in the Watergate Hotel in Washington, D.C. Five men were caught breaking in to the DNC's offices. It turns out that the men were hired by Nixon's administration. After the break in, Nixon tried to cover it up, but reporters and investigators eventually fou... |
Why are sweeteners in soft drinks very common (Diet Coke/Coke Zero for example), but not in other sugary foods such as chocolate bars, cakes or candy? | One of the problems is e.g. hard candy uses sugar not just to be sweet, but also to have structure not existing in drinks. Once you find candy types without this problem, sweeteners appear to be quite common. Stevia-sweetened chocolate and compound chocolate certainly exist. Stevia gummies have reduced sugar, using col... |
How come metal is cold in room temperature? | Metal, and other stuff feel cold at contact at room temperature but they are actually at the same temperature as everything, the reason it feels cold at touch is because of heat transfer, you can think about heat as a kind of energy something has and heat will always seek to level with the environment transmitting heat... |
How can they say it will rain at 2:36 PM but also say there is only a 20 percent chance of rain? | The two calculations are telling different things. The percentage chance of rain is based on predictions of the precipitation in the general area, and are going to be based on a combination of the likelihood of any rain falling at all and the amount of the area that will get rained on. If it's probably going to rain in... |
What causes those random, short, stabbing pains you feel sometimes? | OP can you clarify? I don't get random short stabbing pains.Precordial catch syndrome. Weird, benign condition where you randomly feel stabbing pains in the heart-area. The cause for the syndrome is still unknown, but also it’s not dangerous or damaging to the best of medical knowledge. That’s what I have anyway, but t... |
What would a 4 dimensional object look like? | Visually it shouldn't look any different to a 3 dimensional object since we can't visually perceive a 4th dimension.You would see a shape morph as you slide along the 4th dimension Someone made a demonstration game of it._URL_0_ |
If you are you because you got half your DNA from each of your parents, why are older/younger siblings not physical carbon copies of each other? | Two main things here: * You get 50% if your DNA from each parent. * The specific genes that make up that 50% are not the same for each child. Let's use a scaled down example. Let's say your parent's DNA is made up of 10 chunks, let's call them A, B, C, D, E, F, G, H, I, and J. When you were conceived, maybe you got A, ... |
Why does fire always look disconnected from its source? | The flammable gasses/particles have to mix with some amount of oxygen to burn. They're too pure right at the surface. |
How is a space rocket's weight supported while on the launch pad? | All rockets have some sort of attachment system on the side of the rocket at base holding it up from the pad. [Here's a gif showing the clamps for the Falcon 9 moving] and [here's a video showing the massive hold-down arms on the Saturn V swinging out of the way as it lifts off]. Some rockets have clamps that swing awa... |
- Is there any truth to the expression, “Beer before liquor, never been sicker, liquor before beer, you’re in the clear”? | We in Russia have an entirely opposite folk wisdom: Градус понижать нельзя . Which means you drink the less alcoholic things first, the more alcoholic later. |
How do shows produced by streaming services like Netflix and Hulu make money? How does viewer count come into play? | Same way that any content makes a streaming service money they draw subscribers in who want to watch the content. When they produce the shows in-house, Netflix, etc. don't have to pay licensing fees to the production companies who own the shows' rights like the would with other shows or movies. |
Can you make a brand new internet, like it would be completely empty with no data, no website no anything? | You certainly can. And in fact this is exactly what happens if you plug some computers into a router but don't connect that router to the public Internet — you just created your own tiny private Internet.I suppose so, but it doesn't make sense. The internet is a network of connected computers. You could in theory creat... |
How does gum have calories if we don’t actually eat it? | The calories on food stuffs are the total, not the portion you swallow. Sugars in the gum are desolved in saliva and swallowed or absorbed directly through the mouth tissue. So even if you don't swallow the gum, the primary calories in it you typically would. |
Sometimes I get a sudden really loud high pitched ringing in one ear, (can be any one) that fades away quickly. What is it and why does it happen? | I had this happen to me every day and was worried it was tinnitus. Being only 20, that would suck. I went to my doctor and turns out it's likely because my nose has been so blocked it's caused my ears to be blocked without me realising. A round of steroids and it's gone completely. So, it could be tinnitus but it's unl... |
why is turbulence no big deal for an aircraft the vast majority of the time, even though it feels like a big deal inside of the plane? | Because the plane is built to tolerate much stronger shaking than the human body's comfort level. Basically, no wind less than flying into a tornado should break the plane up. |
Why do toddlers yell when they’re having fun? | They don't have the words to describe how much fun they are having so they do a yell about it. Plus social conditioning hasn't set in to make them feel weird about being vocally excited. |
If drums produce sounds that correspond to certain frequencies (e.g., C#, F), how is it that drums, when played, do not clash with the songs in different keys? | A two-dimensional surface like a drum skin doesn't give out a single note or series of simply related harmonics of a note like a vibrating string or air column. There are a much more complicated set of vibrations that give out a mishmash of frequencies simultaneously. It also depends where the stick hits the drum. Here... |
With the history of large ships being taken over by "Somali pirates" or whatnot, why aren't those vessels outfitted with mounted machine guns, and a couple GTFO rocket launchers? | Most of these ships are civil. You'd need military personal for that and the approval of a country and the international community. And probably you can't just kill everybody just like that.Some of them have armed ex commandos on board for security. A friend of mine used to run one of these companies. Moving the weapon... |
why do some antidepressants have "suicidal thoughts" as a side effect? Is'nt it counterproductive to take these drugs and still have those tendencies? | You'll notice that there's many brands of antidepressants, and they're all or almost all different formulas and can affect you differently. Sometimes negatively. So if the particular med is giving you that kind of stuff you're supposed to consult with whoever prescribed them and get switched.I think some of these remov... |
Why is it so hard to find a reading position that doesn’t become uncomfortable after five minutes? | It's because books aren't designed to be read! I swear, I have this problem! And, I've concluded its because we keep making books in way that have to awkwardly pulled open with two hands |
Why is staring at a solar eclipse deemed to be dangerous and what is the difference from just staring at the sun? | It's not any more or less dangerous than looking directly into the sun. The danger comes from people assuming that because the sun is blocked, that they can look into it. That's why you hear warnings not to look into it.When you look at the Sun, it hurts because of light overload. When the Sun is 50% eclipsed, it still... |
How does the open refrigerator at the store with cheese, butter, etc. not spoil the food, but our refrigerators at home need to be closed? | It's also only used for stuff that is somewhat shelf-stable. Cheese and butter have always been a way of storing dairy beyond its expiration, especially before pasteurization was around. & #x200B; There is actually a lot of tech and nuance that goes into things like grocery stores. The supply chains for some of them ar... |
How was Amazon able to pay $0 of Federal income tax on over $11 billion of profit | I assume, without knowing specifically, that Amazon had massive net operating losses in prior years which it used to offset it's taxable income. |
How is the British Prime Minister selected by such a small group of individuals? | The simplest explanation is that as a whole, the UK voted for the Conservative party to be in power, meaning that that party has the vote on who runs the Parliament. & #x200B; It's also key to know, that the general public have again got a PM that wasn't voted for, we got May due to Cameron throwing his toys out the pr... |
How does seeing a crush or a SO cause the feeling of lightheadedness and 'butterflies' in the stomach? What are the butterflies? | LPT: When this happens, immediately walk up and say hello, don't hesitate or hold back at all. Show your nerves that whatever they're freaking out about isn't that bad. Best case: It goes well and you maintain the friendship/get a date with your crush. Great! Worst case: It's incredibly awkward, there friends all laugh... |
how are some flying animals (e.g - sparrows and house flies) able to fly at such a high speed without bumping into anything? | How are you able to drive a car at such high speed without hitting anything? You drive a lot faster than t can fly. And who says they don't bump into anything? Have you never had a flying bug smack you in the face when you're just standing there minding your own business? And birds hit windows, though that might be bec... |
Why is seawater green in some places, and clear/blue in other places? And why dont these colors mix? | Algae. They do mix, water can be varying shades of green/blue and have varying opacity. Cold water from springs or from snow melt is a lot more likely to be clear because algae don't like cold water with strong currents. If you follow that same water downstream to a lake at a lower altitude, you will probably see more ... |
Why don’t our ring fingers have the same mobility as our other fingers? | ELI5: How's ring finger not as mobile as other fingers? I tried bunch of things with index and ring finger and I can't find any task where ring finger would perform worse. |
How does cardio decrease ones heart rate? | When the heart gets in better 'shape' the left side beat gets more efficient. It needs less energy to pump the blood and requires fewer beats for whatever load you put on it. It is really your entire circulatory system that gets more efficient. Plus, your muscles use the oxygen more efficiently thus requiring less bloo... |
How do we know π is never repeating when could be just a really big series/pattern of numbers? | We've proved that pi can't be a rational number, and since all non-rational numbers never terminate or repeat, it means that pi never repeats.There are two properties of every number that are equivalent: 1. Can it be written down without any repeating patterns? 2. Can it be written as one whole number divided by anothe... |
how come a camera can pick up light on a TV remote when being used but you can't see it with your own eyes? | Most people don't actually know this. It is a good way to check if your IR remote controls are working. Just point them at your digital camera and start pushing buttons. |
What decides the volume and duration of a thunder clap? | What I don't understand is sometimes lightning is super bright and seems very near, and the thunder clap never comes, or is quiet. The brightness of a bolt of lightning doesn't always seem to correspond to the volume of the thunder.I’m not an expert, just a storm-lover and wanna be storm photographer. Can I add that if... |
what keeps our bodies from decomposing before we die? | Decomposing is our body being eaten by bacteria. While alive, our immune system is maintaining a balance of bacteria in our bodies and killing any that enter restricted areas. When dead, our immune cells aren't getting the stuff they need to live, so they die, so the balance isn't being maintained and the bacteria win. |
Why does a 1080p Nintendo Switch look great on a 4k TV, but a game in 1080p on a 4k computer monitor look so pixelated and bad? | 1. Distance. You tend to be way closer to a monitor than a TV 2. TV/Monitor's resolution. Image will always look better when the TV is running at the same resolution as the source content. The TV may SUPPORT 4k, however if a 1920x1080 input source is connected, it will operate at 1920x1080. It's possible that if a 1920... |
100AH battery should charge at 10% capacity tops safely....? | It completely is based on the battery chemistry and what is a good C rate of charge. Lithium is completely different than Lead Acid, which is different from NiMH, etc. Lithium, for example, can tolerate much higher rates of charge than other chemistries, and internal BMS systems keep it from overcharging or charging to... |
why have planes stopped getting bigger? | Not enough problems can be solved better with a super large planes than a merely very large one. Bigger isn't better. |
How do researchers know when they have found a new species of an animal and not an already discovered species? | People who find new species tend to be experts in that type of organism so they are familiar with the already known ones and will recognise something that isn't catalogued. |
Why are sore throats so bad in the morning? | Gravity as well; you're lying down so fluids in your body will tend to migrate equally as opposed to moving downward while you are upright while awake. It may not seem much, but just a little more swelling from this will make your already swollen tonsils hurt even more. Same reason why your nose might be stuffy while l... |
how do milkshake mixer machines stay clean? | I used to work at Baskin Robbins back in the day. Part of the procedure for making milkshakes was the cleanup afterwards. The steel cup used was rinsed, filled with water, then mixed for a few seconds, washing off the agitator arm. I'd imagine at a place where they made a lot of milkshakes, they might skip this step, a... |
why do flamingos stand on one leg and do they have a dominant leg? | Flamingos don't have a dominant leg, neither any other bird species have. Researchs has shown us that the bird family including chickens, gooses, swans and ducks stand on one leg to minimize their heat loss, while doing that, they balance their gravity center to not fall and hurt themself. |
Why is fiberglass not considered as dangerous as asbestos? | Well I know that the asbestos fibers are so fine and light that they float invisibly through the air and destroy your lungs if you breathe them in.I think fiberglass stays in larger pieces and doesn't become razor sharp dust", 'The bad part about asbestos is that some of the components are carcinogens. Although a fiber... |
What is happening in your stomach when you feel like it's "dropping" on a roller coaster? | Try tossing a half-full water bottle into the air and watch the water carefully. You'll notice that when the bottle starts to slow down, the water keeps going a little longer and splashes against the top of the bottle as it comes back down. That's basically what's happening to your insides. All the fluids and soft tiss... |
When walking with a glass of water, why is it more likely to spill when you watch the glass opposed to looking straight ahead? | Your for used on not spilling the glass, instead of walking properly, which is more important for holding the glad right. You body is good at the basic movement of grabbing the glass, and holding on until you put it down. It's a bit trickier to walk. Focus on the landscape that you're moving through with your eyes help... |
Why can't a sitting president be indicted for crimes while in office? Is this a set rule or just tradition? | The very short story is that he is in a position to block a guilty verdict. He can fire the prosecutor or pardon himself. The justice department doesn't prusue charges where there is little or no chance of a guilty verdict. This isn't a rule but more common sense to not waste resources that could be better used elsewhe... |
With the millions (or billions) of barcodes in the world and more being added daily, how are they all unique? | Barcodes operates as an alphabet, so they don't need to be unique. When you scan it, it just needs to display a item number/name, that a system can read from its stockhold index, and from here you get the price, or any other information needed. |
Why when penguins walk, they walk in a row? | I'm only taking an educated guess but I'd assume it's because they're unstable upright and they can reduce the effects of the strength of the wind when walking single file, cutting through it like a knife, while bracing themselves against one another. |
How can large company executives get paid in huge amounts of company stock and sell that stock without being charged for insider trading? | Insider trading is buying stocks knowing information not available to the public. Cheating in a way. Being given stock doesn't count as insider trading. Insider trading would be buying stock for a company in advance of some sort of announcement because you knew that early. An example would be buying stocks of a company... |
Why is it recommended to breathe in through the nose and out through the mouth when exercising? | In martial arts it's safer to inhale through the nose because it gives your jaw more stability and better to exhale through your mouth because explosive moves are stronger this way and if you get hit somewhere your upper body, you don't risk to get punched while inhaling.Dune taught me to breathe in through my mouth an... |
How did a minority of slave holders got a majority of southerners to fight the civil war? | so you should help me keep them, I mean us, help us keep them." The southerners were like "Okay."The decision to seceed was made by the political leadership of the southern states. Many of those leaders were weathly slaveholders themselves, so the views and concerns of slaveholders was over-represented among the decisi... |
How do archeologists know where to dig? | The first archeology was done be a german in the 1800s who was interested in the Iliad. There was a local legend that a particular hill was the site of the ancient city of Troy, so he got a crew and dug into the hill. He found the ruins of an ancient city. For a century archeologists basically went around the world dig... |
How can terms of services apply to teenagers when they are underage yet still old enough to use social media platforms? | So from what I understood, in the UK, you can legally sign for yourself and understand your responsibilities from when you are 13 or 14 but I'll need to clarify |
; To whom or "what" does the world owe it's international debt, and what happens if we don't pay it off? | Almost all international debt is not to a country. It's to an international investor, like the World Bank or some bank. If you don't pay your debt, nobody will loan you money, and your economy will collapse and your people will overthrow your government. |
Why Isn't the Milk Way expanding as fast as the rest of the universe? Or Is it? | Take the whole universe and put a big grid over it. Now, every year expand each rectangle 0.00001%. That's about how universe expansion works. The universe isn't itself expanding fast, but the edges are as you add up a ton of small expansion effects. The gravity of the milky way can adapt to the small amount of expansi... |
Why do strongmen have more body fat & smaller muscles than bodybuilders but can lift heavier? | They don't have smaller muscles , they just have less definition because of the fat. A body builder makes every muscle bigger, but you're not using every muscle to pick something up. A body builder also tries to get to as low a percentage of body fat so you can see the muscles. |
Why is it that sometimes we see the sun with rays shooting out of it, and other times we see just the orb-form of the sun? | If you're referring to sunshafts, these come from gaps in clouds causing certain parts of the sky to have sunlight and other parts not to. Sunlight is really bright, and the air scatters some of it, so the parts that are illuminated look brighter than the parts without. This creates what look like beams coming from the... |
When driving a car with an open window at certain speed, why there's a noisy sound in the ear like pulsating or drum ? | It mostly happens on cars made this decade? I don't recall this happening in old cars without AC so window open all the time. I had two mid 2000 cars that also didn't have this effect. But all cars made after 2010 seem to have it.It’s a super low frequency in the several hertz range. Think of when you blow air over a b... |
How is community college different from normal college? Like... did the community pool money together to build that college or something? Sorry, I am not American. | Community colleges are inexpensive local schools which generally admit anyone. They're also considerably less prestigious and don't offer a full range of degree options. But you can take most of your classes and then transfer to a bigger school for your final year. |
why is the color green the only one that is used to edit backgrounds/things in movies? Why can't other colors be used? | Other colours can be - and are - used sometimes. The shade of green on a green screen is chosen because it's easier to remove completely from a shot and replaced with an alternate image. If they used a more commonly occurring colour - say, blue for example, there's a chance the colour is present in clothing or skin ton... |
How does the police obtain the position of a call without the phone having location turned on? | Every phone pings to it's nearest tower while on call, they'll select 3 towers in shape of triangle , by using mathematical formula they'll find distance between tower and caller device then they'll search in area where tower is near that's why it's not much accurate but we can find device within range of 600m nearby |
Why are ice cubes mostly clear but icebergs are white | Icebergs come from snow that's fallen inland that has been compacted for thousands of years and slowly migrated towards the ocean. There is a lot of air and things that aren't water trapped in them making them appear opaque. |
Why does cold alcohol seem to go down easier than when hot/warm | There's an immediate numbing to your taste buds that take place when something cold is put on them, and thus they are less active. For strong alcohol, like grain alcohols, this makes the terrible taste of the large amounts of ethanol in them less apparent, while letting the other flavors come to the forefront. |
Why kids(6ish) can sleep so heavily, easily, and through things, and why adults can't? | I became a much lighter sleeper after having a family, I've put this down to stress and instincts. |
Why are auroras mostly seen in high northern and southern latitudes? | As other have mentioned Earth is basically a gigantic magnet. Earths magnetic field looks a bit like this- [ / ] [ / ] < edit1: dang it Reddits autoformating is destroying my ascii art > < edit2: Yay! fixed it i think. > Magnetic Field lines emerge out of the pole, arc out into space, and loop back in, returning to ea... |
Why is it that it feels so great to stretch your legs after sitting down for a long time? | Educated guess here but I imagine it's because blood flow to the lower extremities is more restricted when sitting. When you get up and and stretch you're increasing blood flow to oxygen-deprived muscles, which feels good. |
How are national surveys such as Pew research so accurate, especially since they interview only a few thousand people? | When you take a sample that can be subdivided the same way as the larger population , there is a mathematical model for how confident you are in your statistics based on the ratio of your sample size to the population size. Let's say you had 95% confidence. That means if you repeated the survey 19 more times, with the ... |
Why do some dead batteries work again after you stop using them for a while? | The answer is that they aren't dead. It's the same reason why if a battery is dying you can roll the battery or take it out and put it back in and it starts working again. Part of it is as the battery reacts it will cause the contacts in the terminals to oxidize which can disconnect the battery , another thing is that ... |
How is it that so many people die with such big debts, and their creditors are still net positive on the amount lent? | Sometimes just the way the loan is structured, sometimes compound interest, especially on any missed or late payments. An unpaid debt accrues interest, and that interest accrues additional interest, etc. If an interest rate is high to begin with, it's not hard to repay an amount that exceeds the total amount lent but s... |
How do they do a print run for a magazine and know what the right sort of paper is? | [Sheet sizes explained.] The ISO sizes at the bottom are typically what's used. If you're a graphic artist, I will add that most print shops employ graphic artists to tweak customer design requests into things that can be used to make print plates/ die plates. If using Adobe, you'll notice you can separate into CMYK la... |
Why does animal camouflage, for the most part, not work on humans? We can often see what the camouflage is attempting to do, but we can usually spot an animal pretty quickly. | Colour vision, most animals can't see the ranges of colours that humans can, colour vision is really important in omnivores and deciding which fruit is ripe, it is less important in pure carnivores. |
What’s the importance of restarting your computer after updating an application/program on a computer? | Consider a car. While the car is running, you can load or unload passengers, or plug and unplug your phone, but you can't change the oil or replace a tire. There are moving parts that can't practically be replaced while they're in motion. A computer program is the same. There are “moving parts” that can't practically b... |
why is a chip on a credit card considered ‘safer’ than swiping the magnetic strip? | The chip causes the terminal to generate a random number sequence which is then checked against your card issuer. It's safer than a magstripe because you can't simply clone the chip like you can the numbers on the magstripe. Of course, as long as cards still have the magnetic stripe, they're still vulnerable because th... |
how did people in places like florida get ice before machines were made to make ice. | Lake Michigan was the ice hun of north america. Upper class people had ice boxes. A deliveryman would deliver a block of ice and store it in your fridge and that's what kept your food cold. |
Vis a vis abortion, why is it so hard for doctors and biologists to pin down "where life begins?" | There's not really a scientific definition of sentient life. A human embryo, like all other cells, is alive. But at what point does the spirit inhabit it? Islam says the spirit is there when the heart beats. Christianity is silent on the issue, I think. Anyone know what the other religions say? |
How do colds happen? | The main reason is a viral infection. Specifically, a group of viruses called Rhinovirii. Multiple factors determine how easy it is to get infected, the major ones being : 1. Cold dry air makes the epithelium of your nose, and throat inflamed and more susceptible to infection by reducing natural mucus production and de... |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.