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why does hay fever leave you alone while you sleep, but attack like a bitch the second you open your eyes? | A whole heap of reasons. People already mentioned your body itself shuts down the reaction to sleep, but also plants aren't putting as much energy into producing pollen at night, winds are generally calmer so it stays on the plant more, being inside rather than outside will filter some out, morning dew brings more down... |
How do we know the earth's mantle is 70km beneath the crust of the furthest we've been able to drill is 12km? | Have you ever seen a picture taken via ultrasound? Earthquakes are the world's largest ultrasound machines.We know how earth quakes move through various kinds of materials. By studying many different quakes by measuring how long they took and how the wave looked when they hit seismic monitors they could begin to get an... |
How does my body know not to sleep for a long period if I nap during the day? | The feeling of sleepiness is caused by a chemical called melatonin. When your brain builds up enough of that chemical you get tired and need to sleep . When you take a mid day nap, you're resetting how much melatonin is in your brain and it takes awhile for it to build back up making you sleepy again. |
Why does putting a grain/starchy food in boiling water soften it, but in boiling oil it turns crispy? | When you put it in boiling water it can suck up the water that's why rice and spaghetti get soft. But boiling oil gets hotter than boiling water so the oil makes the water in potatoes for example evaporate. The pressure from the vapour trying to get out prevents the oil from getting in and because it gets dryer and hot... |
If the legalization of marijuana is so successful in Colorado, why are other states so slow to do so? | because laws come about from local population's politicians who answer to local voters. even if 5% of your local population is for legalization, the other 95% could be against, or not care either way. but if you legalize and the other 95% don't like you, then you don't get relected. politicians want to be reelected |
Why do people have to turn off their electronics in an airplane? | Supposedly due to interference - like the pulsing sound you get in AV equipment when a phone makes network connection. It's unlikely to cause any actual problem with the flight systems and is probably more to do with the practicalities of excavating an aircraft during the two most dangerous phases of flight. |
What's the deal with protein denaturing when you cook it? | This has got to be false as 90% of the world cooks their food so if it was removing all/most of the nutritional value a lot more people would be dying from malnutrition, This isn't to say that some of the nutritional value isn't lost because it is, Overcooking by a lot lose maybe 40% of the nutritional value so it woul... |
How is Helium, which doesn't undergo any reaction when used, a limited resource? | Ultimately nothing quite disapears, that violates the laws of physics. Helium just floats off into space. Doesn't react with anything, it's still there, it's just dispersed to the point humans do not deem it worth recovering. Hydrogen, for contrast, reacts with basically everything. When hydrogen escapes it tends to re... |
How do pets not get sick of eating the same meal everyday? | They do. My wife's cats stop eating theirs, so she bins it and buys a better brand to see if they'll eat that. This process is repeated every two or three weeks. They have her under their control. |
Why the Navier-Stokes existence and smoothness problem has not been solved yet. | The conservation of momentum equation contains a non-linear term. In this convective term, the power of the fluid velocity is greater than one.I'm guessing we know how to solve almost every linear differential equations but only a few of non-linear ones. What we do for numerical simulations are approximations such as f... |
Why do front-facing cameras (e.g. selfie cameras) on phones take mirror image pics? | They don't. Or at least my iPhone doesn't. What it does do is to display the mirror image as I set up and take the picture. But then, when I look at the picture that was actually taken, it's flipped. It's just easier to position the phone for the picture using the mirror image. Move the phone to the right and the frame... |
Why does the US send aid to other countries when there are people in need here? | In the long run, foreign aid is a lot cheaper than wars. First choice is usually to fund moderate forces and simple things like drinking water and agriculture. But if some extreme right or left wing organization is rising in a country, we may fund the opposition just to dampen that rise. |
how the moon is tidally locked to Earth? | It's a natural phenomenon when a celestial bodies orbit each other with the effect much more pronounced with smaller bodies orbiting more massive ones. They are being slightly stretched and distorted by gravity, providing a force that counters rotation. Given enough time, this results in the bodies becoming tidally loc... |
Why is it "bad" to get paid to give a speech? | It's the same grounds as when scientists are paid by companies to do research - a conflict of interest - the scientist might not get another grant if he doesn't give them the results they want. There's also the question of impropriety and quid pro quo. If you get paid an awful lot to do something trivial, you're going ... |
Why are Italian and Latin different languages? | Italian is descended from vulgar Latin, and is influenced by the languages of various groups that conquered parts of Italy over the years since the fall of the Roman empire. Standard Italian originally comes from Florence and the dialect spoken there. |
How do people die from a drug overdose by using drugs you ingest? Wouldn’t your body just throw it up? | Not everything that's bad for you makes you throw up. That's your body's reaction to specific stimuli, not to everything bad. Plus, you can only throw up what's still in your stomach. It's possible to absorb enough of something into your bloodstream to kill you, at which point throwing up won't help because it's alread... |
How is Comcast not considered a monopoly? | You seem to be under the impression that monopolies are illegal. They aren't. They are simply restricted from acting in certain ways that involve them using monopoly power to block competition. Of course Comcast is a monopoly in most markets where it does business. What's more, your town almost certainly signed an agre... |
Why can't car doors open underwater? | They will open, but only after the car is full of water. When there's still air inside the car, the pressure of the water outside the car keeps you from opening the door. |
How is the USA involved in the Ukraine conflict? | Don't forget that when the USSR collapsed there were many nuclear weapons in Ukraine which remained when Ukraine gained independence. In return for giving up these weapons the US, the UK and Russia all agreed to respect the 1994 borders of Ukraine in the [Budapest Memorandum]. While this document doesn't commit the US ... |
Why doesn't churches pay taxes? | Because *in theory* they're basically a non-profit charity, and don't influence politics.In the US, non-profit organizations enjoy certain tax advantages. Most churches qualify as non-profits. If you wanted to start the Aardvark Appreciation Society, you could have almost all the tax advantages that a church does. |
Why is midnight at midnight? Who chose when the new day started? What's so special about it? | It's easy to see how sunrise would be considered the start of the new day. So somewhere in the middle of sunset and sunrise is the middle of the night, when the old day ends, and the new day begins. It's only in perhaps the last 150 years that the people could do things after sunset. For most of human history, the nigh... |
Why most internships don't pay? | Interesting fact about the Australian law on this matter. A distinction is made here between work experience and an internship . Australian employment law says that you don't have to pay a work experience kid, but you do have to pay an intern.You do internships to **learn**, not supply yourself. Both of you earn on it:... |
why Congress can get away with repackaging unpopular bills (SOPA - > CISPA, etc.) over and over until they finally get passed? | This is not an appropriate post for ELI5. You are not asking for an explanation for a complex subject. You are not asking how the US political system works. You are complaining about a political injustice. There is a great subreddit for this purpose called [r/politics]. edit:couldn't figure out relative links, so I jus... |
Why don't females carry their original surname after marriage | First of all, many do. If they don't, it is simply an old tradition that makes it easier for the entire family to have one name. Currently, with families mixing and women establishing their own credit and professional reputations prior to marriage, many do not change their name. Personally, I have been married twice bu... |
How can you colorize old pictures, if they are made with 0 color intensity? | You just paint over them with transparent paint. That's basically it. Programs like Photoshop have special functions which help you select very specific area and add colour to parts based on their luminosity. EDIT: To clarify, you still have to choose which colour goes where. It's pretty straightforward for skin and pl... |
Why Does a Green Screen Need to be Green? Why Not Yellow, or Blue? | Green screens work because there is very little green in human skin. Yellow screens would definitely not work, as most people have some yellow in their skin. Blue screens are used quite often as well. Green screen is more of a slang term, the proper term is chroma key screen which can technically be any color that isn'... |
Why are Republicans pushing to defund Planned Parenthood when taxpayer money can't be used for abortions? | If PP has to choose between paying their utility bills and paying for an abortion and I come in and pay their utility bills I have in effect paid for an abortion. The law prohibiting taxpayer money going towards abortions doesn't actually work because money is fungible.The argument is that money is fungible. It's like ... |
Why, when exposed to the same amount of sunlight, do my feet tan, but my legs don't? | The angle is the thing that matters here. When light hits surfaces at steeper angles less of the light is reflected and more is absorbed. If you're mostly stood up your feet will be at 90 degrees to the sun's rays for most of the day and so will receive a higher intensity than your legs. If you're laid down you will g... |
How can Deandre Jordan back out of a contract agreed to (even verbally) with one team and go to another? | An oral agreement isn't binding in that situation. He hasn't signed anything yet, so legally he's still free to change his mind. |
Why does the dentist (endodontist) encourage me not to smoke before a root canal procedure? | I'm guessing that they're probably worried about the nicotine interfering with the anesthetic they're going to use. Nicotine can affect your heart. Under normal circumstances the effect is negligible, but it can interfere with other drugs in a dangerous way. |
Do cross eyed people see differently from non-cross eyed people? | Heavily cross-eyed here. I had to get surgery before age ten, otherwise I'd be blind in my right eye from age 20+. To answer your question, since they both point in quite different directions, I've always been able to focus one eye and see one POV, and see another with my other eye. It's kind of cool, because if I do i... |
What makes cyanides so extremely poisonous when Carbon and Nitrogen are found everywhere in non-toxic states? | Protons are also found everywhere in inert states, but sometimes they arrange themselves just so that they start thinking about themselves. It's important to realize that the components of a compound are usually significantly less important than the overall structure. Drinking diluted ethanol is a national pastime all ... |
why do we tilt our heads back when laughing out loud? | Behavioural psychologists will tell you that it's a sign of trust as you expose your throat to another. A kind of show of submission/approval. |
Why don't all the radio/microwave/EM transmissions all interfere with each other and create one giant mess? What keeps Radio and TV signals separate? | Go to the ocean/sea shore. It's a calm day, so the water's relatively smooth, but there are some of those slow big waves coming in from far away. Throw a rock far off into the water, and it lands right on one of those waves. It makes a bunch of small ripples, spreading out from the central point where the rock hit the ... |
How were instruments like clarinet, saxophone, flute, etc. invented? | Gradually. Flutes started as a plain tube with holes in, blocked at one end. However, to get a full range of notes, the fingerings can be quite complicated. Keys were added gradually to make it simpler to play, and to achieve a better sound, and a greater range. There's an article here: _URL_0_ |
Can someone please explain how an the officer in this video does not need a warrant to enter her apartment | Because she opened the door. Once foots in they don't have to leave. If she hadn't opened the door and talked to them thru the door/peephole, none of it would be on the internet", 'Reasonable cause. Its a broad term and is followed broadly * They smell marijuana, they can go in* They get a domestic violence call and he... |
Why can't computers read a CAPTCHA? | Computers don't understand text like humans do. We see familiar shapes and are trained from a young age to identify letters and words despite differences in the way they're drawn. Computers handle text by associating a code with each letter. Whenever a known code is encountered, depending on the context of what you're ... |
If a plank, standing upright, was 1m high and 1m wide but only about an atom thick, would it still be visible? | It depends on several things, but yes, it could be seen. To pick one example, Graphene can be seen. Graphene is a 1-atom thick arrangement of carbon atoms, and it absorbs about 2.3% to 2.6% percent of visible light, and [Wikipedia even has a photo]. More than that, you could probably test your idea to the size too. It ... |
How did "Special Head" on America's Got Talent do his levitation act? | This is one of the oldest tricks in the book. Most magicians will [know what's going on] the instant they see he's using a stick. |
what exactly is it that Windows can do that my Mac (OSX) can't? | 1. It's incredibly frustrating for little OS differences that users of either system learn as common sense to not hold on the other platform. This is why I and others hate Macs, and therefore never recommend them. It's not a good reason, but it is what it is. 2. They aren't a great price for their specs. 3. Everything ... |
Why is pi considered irrational if we can measure it physically? | An [irrational number] is a number that cannot be expressed as a ratio of two integers, and has nothing to do with being able to measure it physically. Something a bit closer to that is [non-constructible numbers], which cannot be constructed with a compass and straight-edge. You can construct a circle with a circumfer... |
How can babies breathe in the amniotic fluids but once given birth they then breathe air. | They don't breathe. They receive oxygen from the mother's blood, which the receive via the placenta and umbilical cord. |
Why do we have a compulsion to read or otherwise distract ourselves while sitting on the toilet? | To counterbalance the urge to hurry up and get it done with? Lot of bad things can happen if you try too hard to move your bowels, which also involves concentration. So, we shift our focus to other things and let nature take its time. Then I heard there's some problem with making your daily bathroom visit a literary ad... |
Why does every other animal of the same species look the same, but humans don’t? | you have a brain that is evolved to recognize minute differences in human faces, since that has a MASSIVE survival benefit to you. recognizing the differences between 2 cow faces doesn't help humans at all, since they're all just food. |
Why do I get an erection if I have to pee badly? | It's because your full bladder keeps your blood from circulating freely through the penis. When you get a boner by mental/physical stimulation, the cavernous bodies of your penis apply pressure to the blood vessels, so more blood flows into your penis than back into your body. The same happens when your bladder is full... |
Why do super high fps cameras (like a Phantom) record at such low resolution | There's not only an issue of storage SIZE, but the bandwidth required to be able to write at a sufficient rate to storage media. You might be able to get essentially infinite amounts of storage should you spend enough money, but you may not be able to write at a rate of a few terabytes per second. |
Considering how powerful modern artillery and vehicles are, what is the role of infantry in today's conflicts? | To take and hold ground. None of the fancy artillery rounds or tanks or helicopters are able to do so. Tanks and artillery pieces require infantry to keep the other side's infantry from using their man-portable AT weapons. Aircraft by their very nature can only support ground forces. It's a team effort and if you take ... |
How do American schools get away with searching students without a parents consent/search warrant? | It's conditioning those future adults that their rights can and will be trampled upon with little repercussion. Schools do not particularly follow due process", 'Short answer: because the supreme court said public schools don't need a warrant in order to search its students. They need only show that they had "reasonabl... |
why do doctors and nurses work 24+ hour shifts when that level of sleep deprivation is scientifically shown to reduce cognitive and motor performance? | Nurse here: 16 hours is the max where I work. Our union states we can't be mandated to work longer than that. There must also be an 8 hour turnaround time before you can work again; if you work 7a-11p, you can't work until 7a again. Many of my co workers work more than one job however, but they don't work 16 hours and ... |
API for someone with a non-technical background | Say I'm a weather company and you're a news station. You would like to have a little section of your website dedicated to the forecast. One thing you could do is start a meteorology department and collect that data yourself. That's too expensive, so you might decide to check the weather companies' website everyday, and... |
Why is Fox News considered not credible? | There's a lot of good stuff in this thread, but one thing about Fox is that they were explicitly created to be a mouthpiece for the GOP. Every news outlet has their biases and everything, but most still exist primarily for the purpose of just telling people what's going on in the world, not just to further the agenda o... |
How are people able to colorize old black and white photos? | They use Photoshop to make selections of each element and guess at the color it was before. It's a tedious process, but the end result is usually pretty cool. Historians who know what color material was likely used in whatever time period, or artifacts from the time, definitely help with those guesses. |
Why is aluminum foil shiny on one side and dull on the other? | I saw this in How It's Made. Basically aluminium foil is made in pairs, because that way the layers can be made thinner, as a single foil could tear before reaching the desired thickness. The two layers go through rollers and rollers during the process, so the outsides come out shiny but the insides, that's been agains... |
What prevents water birds from being able to dive beneath the surface? | Density and leg placement. An easy comparison are duck species that dive vs. ones that don't . You'll see that the diving ducks have legs that are placed further back, which makes them pretty awkward on land. Also, they have smaller wings so less air is trapped in the feathers, and they can squeeze in their feathers to... |
Why do men not get engagement rings? | If you want your boyfriend to wear an engagement ring, then just ask him to. It's 2012, women have had equality for a long time. A ring no longer is used to show a mans ownership over his woman, it is simply used as a sign for love. I am a dude and I wore my engagement ring when I was deployed, it reminded me of my gir... |
Why hadn't the United States just switched to pure numbers voting? | As opposed to the electoral college? That would require a constitutional amendment. The smaller states benefit greatly from the current system and *strongly* disagree with the political leanings of the few large states that would dominate voting in that scenario. The amendment would need to be ratified by representativ... |
why are bridesmaid dresses one time use (generally)? | Generally, bridesmaid dresses are only good for one use because they're pretty ugly and/or reflect the style of the bride rather than the bridesmaid. Sometimes, they are also overly formal and thus not something you are likely to be able to use again. |
Why is gas so cheap in the US right now? | 3 Main Reasons: 1. Gas always gets cheaper during colder months. Less trips are taken due to the weather, and sportier cars that tend to be less fuel efficient are parked to avoid seasonal damage. 2. We are still feeling the effects of the recession in the 2006 Era. Businessmen in the oil industry are extremely nervous... |
What causes someone to think it's okay to drive drunk? | Everyone has different brain waves and ways of thinkin' up stupid things to do. Boozin' just amplisplodes those things and all of a sudden yer behind the wheel driving to the closest titty bar because I'm a lonely sack of shit. |
why is it difficult to sometimes translate your thoughts into written/spoken words? | Thoughts are filled with emotions. For most it is hard to put emotions in to words. And most emotions require a complex explanation to properly convey their true meaning. So it's hard. |
Why do we eat pig's skin but not cow's skin? | I can't say why we eat pig skin products such as pork rinds but it is used in sausage to improve consistency . However, I can say there is pig leather and many other types of leather. Motorcycle race jackets are most often made of kangaroo leather because it has no grain and therefore does not tear as easily. I have 2 ... |
What causes teenagers to feel like "no one understands what I'm going through"? | Because the kid doesn't understand what they are going through, and they aren't mature enough to contemplate anyone knowing something they don't.Probably because this is a major transitional time for them. They are coming into the realization that they will soon be responsible for their own lives and decisions and they... |
Before satellites how were maps made accurately? | The first maps made that cover large areas were made from aerial photogrammetry. WWII involved the use of the first planes to take photos of the ground and make maps. These were really the first maps that were of actual things, from real information, and not just people's interpretation on their place. After WWII, Gove... |
How does streaming a video online differ from downloading it? | Downloading saves it on the hard drive. Streaming just keeps it in memory while it's played and then drops it. |
Why do we tend to set the volume of the TV in multiples of five? What's with multiples of five? | How many fingers do you have on a hand? See how easy it is to count in hands of fingers? You have ten fingers total, which is why our numbers are expressed in tens. Fives are the next most reasonable thing to use when tens just aren't specific enough.Our brains like to recognize patterns and give order to things and 5 ... |
why maps of flights curve | The shortest distance between any two points on Earth is found by making a circle around the Earth's circumference that intersects those two points and then taking the shorter of the two distances . When you show this on a globe, the line is straight; while on a map the line curves because all maps distort the Earth. T... |
Why do employers pay little attention to what your college GPA was? | In addition to the great answers in this thread, there's also another reason: A grade in a class is, essentially, the equivalent of a 5-star rating. That's it, that's all the context you have. Was this class deliberately and infamously brutal? Was this class burdened by the higher-ups who don't take it seriously and fo... |
Why is the past tense of hang "hung" when talking about an object but "hanged" when talking about a person? | Three different verbs, one strong, two weak, merged at different times throughout the history of English. Ultimately they became just the one verb we have, 'hang', but kept the weak past participle 'hanged' for transitive use in legal context, while the strong past participle 'hung' became regular for all other uses of... |
How a knife thrower always hit's the target with the pointy end. | Every knife needs to spin exactly one and a half times to stick. A heavier knife will take longer to spin and therefor needs to be thrown from farther. Each different knife has its own particular distance it needs to be thrown from. Steak knife is about 7 feet, a large kitchen knife is about 9 feet. Face your target. H... |
Why do consoles still need discs even after installing in order to play a game? | Sometimes, it's because some of the data is still stored on the disc, to make the installation smaller. But most of the time, it's for anti-piracy purposes. You could copy the game data from one hard drive to another, but requiring the physical copy ensures only one copy is run at a time.It is purely to prove that you ... |
Why is there no such thing as an E# or B# note/chord? | First thing to understand is how scales and chords are built. As a general rule of music theory, when you're building scales, chords, arpeggios, etc you try not to repeat notes. So if you have a C and the next note is C#, change it to C, Db. That's where E# and B# come in. They are just alternate ways of writing F and ... |
Why are countries like Pakistan and Singapore listed as part of the Commonwealth of Nations, but Queen Elizabeth II isn't listed as their monarch? | Commonwealth nations don't have to recognise the Queen as their sovereign, just as the head of the Commonwealth. In fact most Commonwealth members are republics, including Mozambique ", 'If you go to about 3:30 it explains it very well_URL_0_The whole videos is worth a watch to |
If it is ok to go 10 miles over the speed limit, why isn't it raised by 10 miles instead? | Artificially low speed limits give the cops an excuse to pull over anyone, even your grandma, for any reason they want. The real speed limit should be whats referred to as the 85th percentile, what 85% of people drive on a road if they don't know the posted speed, but then the cops lose the ability to pull you over for... |
Is it incredible that we only see the same side of our moon or is this common in the universe? Why doesn't it rotate and is there an explanation? | And to clarify: our Moon DOES rotate. It's just that the rotational period exactly matches the revolution period. |
How much choice do soldiers get in terms of weaponry? | Surprising I haven't seen a soldier reply yet. Don't use Call of Duty as a reference to anything but the state of mind of a 12 year-old. Military soldiers don't really have a choice in what they take into battle. They're issued a weapon. In the US, it's typically an M-4 or M-16, might have a few attachments. Grenadiers... |
American politicians always talk about millionaires and billionaires paying less in taxes than everyone else (or even not paying taxes). How is this possible? | Most frequently, they're talking in terms of percentages , but sometimes they're talking about absolute numbers. This arises because different forms of income are taxed at different rates, and the very wealthy tend to have most of their income in forms that are taxed at low rates whereas most people get the majority of... |
Why are LED light bulbs so expensive while LED diodes are so cheap? | The power supply is the big issue, as they require DC current, and your wall outlet is AC. The second issue is that the light comes out of them at a very narrow angle, so this means you need a big reflector and a housing to make them act like a normal bulb and emit light in all directions. The third issue is simply due... |
how vaporizers (or nicotine vape pens) pose less health risks than smoking cigarettes. | Well, there are a few factors that go into it. Cigarettes are a tobacco base filled with a multitude of chemicals alongside the nicotine that's naturally in the tobacco, the chemicals causing them to be much deadlier than if you were to smoke homegrown tobacco without the additives. There are tons of carcinogens as wel... |
why do printers use cyan, yellow, and magenta instead of red, green, and blue? | If you want to really get a feel for why, grab some paints, in red green and blue, and then cyan yellow and magenta, and try and mix the colors you see around you. You'll find that the blues will never be just right unless you use cyan and you cant get anything lighter then green without yellow. |
Why do Linux-based Internet browsers disable the backspace-to-go-back feature? | it is somewhat unnatural, iyam. It is meant to delete stuff. You can use 'alt' + < - or - > for back and forward, usually, which is a better fit for .. back and forward ;-) On the mac this would be 'command' + < - or - >", 'Not an explanation, but I never knew there was a backspace-to-go-back feature. Just tried it on ... |
Why every garbage dumpster smells the same? | You know how if you mix a lot of different colors, the end color will be black? It's the same for smell. If there is a lot of different smells or food juices/ whatever else might be in a dumpster and let it mix and sit for a while, it'll smell like dumpster. Source: I made that up |
If pi has infinite digits, why doesn't that mean that there is a copy of the matrix.mp4 In it somewhere? | [Vi Hart: Are Shakespeare's Plays Encoded Within Pi?] Make sure to check out the links in the video description, too. There's even a [site that lets you search for digit sequences in Pi]! |
older shopper and exact change | They don't want to wait for the cashier to count out their change since they are old enough they've experienced new cashiers enough to be like, fuck it, no change, no problem. |
Babies and toddlers have smaller lungs and vocal chords than grown ups. How are they able to cry and scream so much louder than adults? | As we mature, our voice deepens. Higher pitched sounds tend to be much louder than lower pitched ones. That's why most car horns and alarms are very high pitched. The sound is louder and travels farther. Being a vulnerable baby, you want to be as loud as you possibly can. So evolutionary wise, a higher pitched voice me... |
How does the brain work on auto pilot mode? | Your brain is always working, regardless of you being conscious that being said, while you are day dreaming, you're lucky enough to have your eyes and logical parts of your brain still working. Receiving and interpreting the information it gets. Tldr; just cause you aren't aware that your brain is working, doesn't mean... |
Why dont game companies just remake popular games for next gen consoles? | You would have a lot of angry gamers. Many people already don't like games like Call of Duty because they are basically copies of the last one. If they did that 100% people would get mad and bored. |
In the footage of today’s Florida shooting, students were escorted with their hands up, why? | Because if your hands aren't up, you're operating with an increased likelihood of getting shot by the police officers escorting you. |
Why can our bodies develop resistance to harsh viruses such as the flu, but Poison Ivy still plagues many of us each year? | Poison Ivy is not actually poisonous. The oily substance on it just happens to be something that causes an allergic reaction in nearly every person. There are those who don't react to poison Ivy at all. The substance is actually perfectly harmless to your skin. But just as with all allergies, that's not what your immun... |
What determines when an issue will be voted on by citizens or decided by government? | It depends on the country or state. Some places have constitutions which state that certain things can only be changed via a referendum. Often this includes amendments to the constitution itself. I think some places allow citizens to submit petitions, and if they get enough support the issue can be put to voters. Other... |
What exactly is an alloy? I know it’s not a chemical compound but is there any chemical bonding happening? Is it just a mixture? | As to the separating part, different metals have different melting and boiling points. An extreme example is mercury and gold. Gold and mercury form an alloy immediately if they come in contact at room temperature. Mercury's boiling point is only 674.1 degrees F, while gold's is 5378 F. The two can easily be separated ... |
Why aren't panda's able to survive on their own in the wild? | Humans have destroyed most of their habitat. They are a fairly delicate species that wasn't exactly taking over the world even *before* people cut down the plants they live in. |
Why is low blood pressure/heart rate an indicator of very good health or possible sickness? | A low heart rate can mean that your heart is not beating effectively and can't keep up with your bodies needs or it can mean that your heart is so strong and efficient that it can pump more blood per beat. |
Why do cables tangle? | When most cables are stored, they spend most of their lives curled up in a circle around something. When unraveled, the cable wants to return to it's 'natural' state which is curled up. Being so close to each other, two cables trying to bend in places where it has been wrapped before will eventually contact each other.... |
How do police manage to arrest those involved in a terror incident so quickly? | Because after ths execution of the attack they get sloppy and/or boastful. They usually don't keep a low profile. |
Why hot water doesn't give thirst satisfaction as the cold water gives? | That's because the physical sensation of drinking tells the brain that you are rehydrating. That sensation is enhanced if the temperature of the drink is hotter or colder\xa0than\xa0your mouth and throat, because the temperature-sensing nerves are stimulated as well as the touch sensitive ones.And most of the time the ... |
McDonald's unmistakble smell. | Most of what you smell in places with a deep frier is the oil that they use for it. It atomizes and sticks to the walls and everything and the smell becomes a permanent fixture clean the ceilings and such, not to mention all the crevices), along with remnants of the food that is cooked in it. This goes for meats and su... |
Why does returning to Point A from Point B during a car ride seem faster than going to Point B from Point A? | I think this is a true phenomenon that a lot of us experience - and I think it's psychological - the actual time is probably very similar - but - in your head you are thinking about all the fun exciting stuff that might happen during your trip.On the way back since you have experienced all that fun - you are reviewing ... |
Why isn't Yelp in serious legal trouble after so many extortion accusations by different business owners? | Yelp reviews have brought my wife a ton of business. She has 38 reviews and they are all 5 star. Yelp has tried to get her to advertise with them and she's not interested. They haven't tried escalating things with her yet, thankfully. She works very hard and deserves the accolades she's received. I hate to think of how... |
Why do airplane cabins need to be pressurized? | Airplanes fly really high. High enough that there isn't enough oxygen for human body to keep conciousness. So pilots and passengers need to breathe nearer to ground level air pressure. |
How did we turn wolves into chihuahuas? | There's no agreed upon date for when chihuahuas became a breed as we know them today, but there's quite a bit of evidence that they were around for at least several centuries prior to European contact. How we created them is the same way as how we domesticated any plant or animal; by selective breeding. Over thousands ... |
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