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Why does the President fly in to major airports? | The President flies in a B747 and also a C-17 which carries his motorcade. He flies into airfields that have 6,000'+ runways to accommodate aircraft of this scale, and have locations on the tarmac where these aircraft can be stored during his visit. It is also important that the President fly into the closest practical... |
Why do we get a stiff neck after sleeping badly? | Stress position. Putting a body in a certain position leads to pain. You don't notice that you're in a stress ppsition because you're that deeply asleep. |
What's up with the random 2 or 3 second blips of commercials in commercial breaks? A commercial will start but only the first second or two will play then it cuts to another commercial. | Networks send out their programming with national commercials baked in. Local TV stations and cable networks can override those with local commercials, but they have to get the timing just right. When they mess up, you get part of the national commercial before the local one cuts inOld insertion Tape was not completely... |
What will happen on the International Space Station if the situation with Russia and the USA/NATO escalates? | The ISS is governed by a set of written agreements between the parties that operate it - the US, Russia, Japan, and the EU. Those agreements cover dispute resolution between the parties and also describe how the ISS could be disassembled if necessary. The worst theoretical case is that the Russians cut the ties between... |
What is the defense for second amendment of USA's constitution in context of other countries' much lower gun shooting rate. | Some Americans believe that having an armed populace is crucial to defending against tyranny. Imagine someone wanted to take over the country from inside, creating a dictatorship and removing citizens' freedom. This would be harder to do if the people have guns. |
Why dont universities allow students to review their exam papers post-grading? | Many universities do. It's a common practice and generally a good thing, because it encourages students to review their work. The downside is that it causes a lot of labor for the graders, who are contacted by students that disagree with the grading--that may be impractical in very large classes. In small classes, I've... |
How do firefighters determine the origin of a fire, in a house that's been burnt down? | I'm a criminal defense lawyer who has defended clients charged with arson. the fire marshal will examine the scene. He will look for points of origin. A point of origin can be determined by the amount of char, the spread patterns of the fire, and common sense. The fire marshal will also use specially trained dogs to de... |
Why is it easier for me to see in the dark out of my peripheral vision, than when I look directly at the object? | You have two types of light detecting receptors in your eye - 'rods' and 'cones'. The cones are responsible for detecting colour in light and are concentrated at the light spot in the centre of the retina . The rods on the other hand are responsible for viewing objects in the dark and they are spread relatively evenly ... |
Why do the vast majority of American car commercials show no real reasons to actually buy the car? | The vast majority of cars aren't that much different from one another. They turn on, get you places, turn corners, etc. And you don't usually buy one because a commercial told you to today, you buy one when you need one, at which point the name you can pull from memory recognition is more likely to be helpful than deta... |
Do the strikes doctors are taking interfere with the Hippocratic Oath? | There is no legal component to the Hippocratic Oath, it is just an old tradition. Breaking the Hippocratic oath does not do anything . The oath means nothing more than the weight each individual doctors puts in it. Is going on strike breaking that Oath? Some doctors might say yes and some might say no. The important th... |
Gaddafi's government in Libya fell shortly after a big alliance started with airstrikes. Why is it taking much longer to destroy IS? | Traditional governments, like Gaddafi's, are like snakes. Everything in the government is connected to the head of the government, and there's no attempt to hide this connection. In other words, there's a capital building, government offices, military bases, etc All these things are out in the open, and all answer to t... |
how are tall buildings drained when rain falls at an angle? | It just slides down the outside of the building to ground level, at which point the same drains that cope with the rain that hasn't hit a building first deal with it. Just because it hit a building on its way to the ground doesn't change anything.I think the point of the question is, with such a large surface area, you... |
why doesn't the caller id on a cell phone tell you the name of the person calling, but land lines do. | It must depend on your cell carrier. When hubby or I call his mom, his name shows up along with the number . |
Why do some peoples' joints ache before it rains? | From my undergraduate-level understanding of physics and engineering, atmospheric pressure drops when it rains. When atmospheric pressure drops, your joints will swell because the fluid around them expands since the atmosphere isn't compressing it as much as it was before. Swollen joints are stiff and achy, at least in... |
How come internet/mobile providers are allowed to label their product as 'Unlimited' when there are in fact limited? | The answer is actually rather simple: nobody has yet called them on it in court.It's not limited, it just slows down at a certain point. There's no hard stop.You just have to go back to the 90's to find your answer. Back in the BBS days, a lot of places only had a certain number of phone lines that allowed people to co... |
Why does everyone on Reddit like Anna Kendrick so much? | Can't speak for reddit but I like her cause she's self deprecating, dorky and funny on Twitter. Also she's hot. Really really hot.Reddit rotates its obession with white, attractive actresses in their twenties on a fairly regular basis. First it was emma watson, then jennifer lawrence, now anna kendrickson, later it wil... |
Why do certain business, like supermarkets, cafes or branches of banks, leave the lights on at night when they are closed and empty? | Those places generally have security cameras. Leaving the lights on would make them more effective if someone does break in. That's just a guess, though. |
Why do most animals seem to love getting their chins scratched? | Should be obvious, they can't always extend their arms in certain places the way we can. So it must feel good to them that they can get a free scratch in places that's hard for them to get. It's like people who like getting their back scratched.Have you ever had a beard? If so, you’d understand |
What is the actual cause(s) of death (physiologically) when someone burn to death(by fire)? | If were talking about total immolation, its caused by a mixture of blood loss, and failures of bodily systems since integral enzymes can only operate under a certain range of temperatures. If cases where someone is exposed to a large fire its due asphyxiation due to smoke inhalationWhen someone dies in a fire, typicall... |
How do digital clocks get "off" over time? | Digital clocks have a small device that vibrates in order to keep time. The clock is manufactured to know how many vibrations are in 1 second. However its never exact. It could actually be 1.0000001 seconds or 1.01 seconds or .999 seconds. So over time. Those very tiny errors add up to a couple extra minutesThe quality... |
What happens to my body if I get into the shower (or bath) with extremely hot water right off the bat? | Depends how hot I guess? Burns are possible, and happens to small kids all the time when kids are put into too hot baths. It's best to just run it to a comfortable temperature. |
why are planes faster than cars? | Close to the surface of the Earth, vehicles have to deal with much more atmospheric drag, which means you have to push harder to get an equivalent amount of speed than you would at a higher elevation, where the air is thinner. That being said, cars *have* been designed that can match or even exceed the necessary veloci... |
Why does Lemon Juice deter Ants but Ants are fine on Lemon trees? | Because lemon trees aren't dripping with lemon juice. They only have lemons on them for part of the year, and even then any juice is contained within the fruit. |
Why do fingernails grow three to four times faster than toenails? | I've heard two plausible answers:One: That because we use our hands more the wear and tear on the fingernails is greater so therefore the body increases their production.Two: Blood flow is more sluggish and resource drained in the feet than in the hands. Could be both combined. |
Where does he fat go when you lose weight? | You breath most of it out as carbon dioxide . The rest leaves as water through the numerous ways you lose water, like sweat, urine, feces, and breathing again. Fat is ultimately converted to sugar before being burned by your cells. Sugar has the formula, C6H12O6, that is it has 6 carbon atoms, 12 hydrogen, and 6 oxygen... |
Why do people bleed less during surgery than then would with normal cuts? | The scalpels are very sharp and tear less. Also there are electrocautery devices. Small arteries can be cauterized immediately to stop bleeding. Surgeons also clamp any large artery. The clamp pinches off the blood supply. Orthopedic surgeons working on the extremities will use ligatures, basically tourniquets to stop ... |
When I turn my phone off at 2%, and then later it says 4%. What is happening here? | Your phone doesn't have a way to measure how much charge is stored in the battery. But that doesn't matter too much because the phone doesn't die when the battery is out of charge. As the battery loses charge, it starts to give out less and less power. What your phone considers "0%" is the point when the battery isn't ... |
; How do people figure out the amount of calories in foods (especially all natural things)? | A calorie is the amount of energy required to heat 1cm^3 of water by 1°C. So, burn the food at a constant temperature in a thermally sealed environment next to a known volume of water, and note the temperature change of the water |
Why does a sore throat develop into a cough and then disappears? | The sore, scratchy throat is usually the result of a temporary opportunistic bacterial or viral infection in the larynx, pharynx or tonsils causing a inflammatory reaction to the pathogens. In the lower airways, phlegm is produced in response to inflammation. Yellow or green phlegm may indicate infectionCoughing is a r... |
Why don't filled in potholes stay filled in for very long? Why aren't they as structurally sound as the rest of the road? | To build a new road you lay an entire block of concrete down all at once that is carefully poured, mixed and molded into a piece of road. That'll last a good long while on it's own. Potholes, on the other hand, are pretty frequent and cities tend to use a quick method to plug up the hole for a shorter time while crews ... |
How is it that when dialing 911 it does not connect to another area code and always connects to a local one. | I'll assume you're talking about dialing from a mobile phone. When you make a call from a mobile phone, the signal goes through a cell phone tower. Every tower has a unique identifier, which is sent with your phone number, the number you're dialing, and some other information to a central office, which is a place where... |
Why are there different accents in different parts of the US? | In the UK, there are different accents every 20 miles or so. It all comes down to community. People crossed America and formed communities all over the place for 200 years. A lot of those communities were isolated from others - particularly in the spacious South and Midwest areas. So those people would develop small di... |
Are records better than CD's? Why hasn't a higher quality format for CD's been introduced?
downloads. | There has been a [better quality CD introduced]. It's been around for a decade and nobody's started using it because CDs are good enough. If you think about it, everyone was buying iPods when they had *worse than CD quality sound*. The majority of consumers don't care about quality as long as it's "good enough". As for... |
Why did humans, and other species, evolve to have both male and female species? Wouldn't it be more efficient if everything could reproduce asexually? | Sexual reproduction allows for more genetic diversity by requiring two very different organisms to combine unique sets of genes, some of which are sex-specific, to create an organism that is genetically half of each parentDepends on your definition of efficient. Sexual reproduction has immense benefits for genetic dive... |
What chemical component in dairy based butter makes butter taste better than other "raw" sources of fat? | "you might say the secret ingredient is salt." - Marge simpson you're probably using salted butter, which most "table" butter is. You can also buy unsalted butter, but that is more for baking and cooking where ingredients need to be more precise, and too much salt could be detrimental to the flavor or the finished prod... |
why are the frozen (under permafrost) methane and quicksilver bad? | They are a kind of a nitro booster for climate change.If we reach a certain temperature, they vaporize and contribute further to climate change.> Does it not mean that these will get released back into the natural environmental cycle? Pretty much. If the permafrost trapping the methane reserves thaws out, it will relea... |
Why does olive oil contain saturated fat if olives do not? | Olives do contain saturated fat, per wiki about 2g out of the 15g of fat in 100g of olives is saturated fat, which is the same as olive oilOlives do. Why do you think that they do not? Everything in Olive oil is in olives as olive oil is naturally occuring in olives. |
Why do mobile service and data providers have a monopoly on the market? Why can't new companies arise? | Mobile service requires the use of radio waves. We are using higher radio frequencies. The FCC auctions the use of these to companies, reserving frequencies for the military, the police, emergency services, et cetera. For a new company to establish a cellular network it would have to bid for a portion of the frequency ... |
If the NFL is a non-profit organization why does it show non-NFL ads on it's own channel? What does it do with the extra revenue generated? | > While not-for-profit organizations are permitted to generate surplus revenues, they must be retained by the organization for its self-preservation, expansion, or plans. That's from Wikipedia. Essentially, nonprofits can make money, but that money is to keep the organization running. |
Why does different digital cables exist? | Because they carry different data, and people would hook the wrong things into the wrong port and it would just not work, and they'd be bothering IT or whoever to make something impossible work. By having different cables/plugs, that is severely minimised. |
How come people can have less muscle but be stronger than people with much more? | Since he is taller than you I'm guessing his limbs are longer and that would actually make it more difficult to lift in almost all exercises. Being taller or having a different body shape could also contribute because more of his weight could be purely structural and not actually muscle, so you might be closer in muscl... |
How can we choose whether warm or cold air exits our mouths when breathing out? | As a person that is involved both in thermodynamics and fluid dynamics I'll try to explain.As @palabam had written the air that exiting our lungs is the same temperature always. What matters then is speed. Here comes Reynolds Number . Re desribes the flow behaviour, weather it is laminar or turbulent. The higher the sp... |
What are the advantages of driving manual transmission car over an automatic? | automatic transmissions work by spinning a disc suspended in thick oil so that another disc is turned by that thick oil. this part is called a torque converter. imagine it like putting a big fan in front of a wind generator. there's inherent loss at low rpm speeds. at higher rpm speeds, the torque converters locks up, ... |
Why does both warming and icing some injuries have beneficial effects? | Warming relaxes muscles, and brings blood into tissue . Icing helps prevent/reduce inflammation.It isn't futile, changing temperature does affect the body. Coldness makes blood vessels contact, reducing blood flow. That is why it's effective with swelling. Warming does the reverse, and increases blood flow. Not sure ho... |
How does Electroshock Therapy work? What, if any, are the advantages and disadvantages? | Got my university psychology notes here The purpose of Electroconvulsive therapy is to induce a seizure by delivering an electrical current to the brain. It's not a new treatment and has a bad perception because they used to perform it while the patient was still concious/awake. We don't know how it works exactly, but ... |
How does smoking increases the chance to get cancer? | A good place to start is what causes cancer in the first place. The most accepted theory is that DNA becomes mutated, particularly in the areas that control growth and DNA repair, which results in a group of cells that grows uncontrollably. An important part of this path is that it is thought these mutations have to bu... |
The role of CB radio in modern day truck-driving | In Alaska, there are probably a lot of roads that don't have cell service. Because of this, CB radios offer a communication option. |
Why can Google translate handle Latin but not ancient Greek (or alternatively why is there no option for ancient Greek on Google translate)? | > They're both ancient languages from early on in the timeline of human linguistics This really isn't true. Latin is not really an ancient language, it is a classical language, only dating back to the 1st Century B.C. Greek dates back at less 2000 years earlier. Classical Latin was essentially frozen a thousand years a... |
How widespread is Chinese Economic Espionage. | I don't understand the question. You're conceding that many countries do it, but want to know more about China? Why? It's the same reason that everyone else does it. Corporate espionage has existed prior to hackers. Countries like China and Japan give that information to their private or state-owned enterprises so that... |
How can this Video to GIF play so smoothly? | That's not a GIF, it's a video. If you look at the HTML source of the page, it says: < source src="//_URL_0_" type="video/mp4" > The term "GIF" is slowly becoming meaningless as various sorts of HTML5 video become more widely supportedMost movies are actually 24 frames per second, so they are going to be less smooth th... |
What's going on with Ad-blocker? Why are websites just now responding? What's changing? | It's always been an issue, and I can remember websites responding to "Ad Block" 10-15 years ago, so it's certainly not new. It is, however, becoming much more common: whereas before it tended to be a small proportion of fairly technical people, it's starting to become, if not the majority, certainly a significant minor... |
What does scale speed mean in toy commercials? | The scale of the model multiplied by the speed it actually goes. So if it's a 1/10th scale car and actually goes 20MPH, the scale speed is 200MPH. It's a meaningless statistic that is quoted because it's always a ridiculously high number. |
If the Perseid meteor showers are caused by a comet with a period of 133 years, why are they visible every year? and why only on a small range of dates? | There is a trail of crumbs behind the comet. Every year we bush up against that trail of comet crumbs at the same point in our orbit. There are enough crumbs in a wide enough path that we can do that for 132 years until the next fly-byThe bits of comet dust are also in orbit around the sun by this time next year, new b... |
The "dank" in "Dank Memes" | "Dank" is a term to describe particularly fresh, sticky, potent marijuana. It has spread to describe anything of a particularly high quality that sets it apart from other things of its sort. |
why do we still need senators and congressmen? | Because the average voter does not have all the facts. There is a reason there are representatives, because they do the job you don't have time to do. Not everyone has time to immerse themselves in politics or the law or the various impacts of a single law on society. You have a job, you've got a film to catch with you... |
How people get attached to fictional characters? | One aspect of that is the fact that you identify with these characters. Wether they're fictional or not is almost totally unimportant. When you speak to someone and/or discovery their life story, you will oftentimes be more interested in the aspects of the person's life that are similar to your own. If you meet a stran... |
Why does milk "cure" the heat of spicy foods better than other drinks? | [Scoville Heat Scale explained with DBZ!] Dairy products contain a substance called "casein", which has a detergent effect on the chile's capsaicin. CAPSAICIN is the substance in chile peppers that gives them their spicinessCapsaicin is soluble in fat. This means a fatty liquid like milk will wash it away better than j... |
What makes substances like porcelain "unstainable?" | Porcelain is often cooked with glass dust on the outside. It's put there to make it shiny and unstainable. When the glass melts into a single layer, it is actually bonding chemically. Silicon and oxygen hold on to the same electron and won't let go easily. Each oxygen holds on to the same electron as two different sili... |
How do celebrity AMAs really work? Do they have a team helping? Writers? PR people? | It varies. Some celebrities, who are probably more internet savvy, do them freely on their own. Some get help from the reddit team, specifically [Victoria]. Some are probably done by PR teams - one of the most notorious examples was the crappy [Morgan Freeman AMA], although it's more likely that these AMAs are done by ... |
why are replays on sports so blurry? | > Can't they use the same high frame rate that people doing high speed motion capture use? No. Those special cameras require special high intensity lights that would blind any athlete on the field. Also, they can only record like 1 second of footage, so you can't have them going the entire time. I think the slow mo guy... |
Why does speeding up a video cause the sound to be higher pitched, while slowing it down causes it to be deeper? | Because high frequency is high pitch, and low frequency is low pitch. Its just that simple. If the video itself was represented as a wave sample that represented colors, instead of just representing the colors directly, the video would become ultraviolet shifted if you sped it up, and infrared shifted if you sped it do... |
when I have a knot in my back or neck, what is it? | Oooh, here's one I can answer. So you have your muscles and above that you have your fascia. Think of fascia as the celophane like stuff that covers your muscles. When you use your muscles calcium get's sent there to use them and basically after a lot of use you can develop scar tissue in those spots called myofascial ... |
Why doesn't the United States have foreign country military bases on its land? | There's no value in it. Countries don't operate military bases for the hell of it, and they have to pay for the privilege to do so. There's no strategic value in one country having a military presence in the US and the US has no reason to allow them to. |
Does grunting when exerting force give you more power? | The sharp exhalation of air from the lungs accompanied by grunting sounds and the contraction of the muscles in the core provide you with the ability to exert a greater amount of force. Source: I take the meanest dumps.In martial arts we do that hiya thing and it's proven to work. It helps you focus on whatever you're ... |
why all living things (almost) try their best to produce offsprings? | I notice a lot of these natural selection questions are a lot easier to understand if you question the fate of the opposite, in this case the answer becomes clearer if you ask instead "What happened to the living things that didn't try their best to produce offspring?" Well they had fewer heirs and eventually died out ... |
If denying your child food and water is child abuse, why is allowing them to become obese and unhealthy not? | When I worked in childcare, we had a 70lb two year old and in that case child protective services did intervene. He wasn't taken away and his parents weren't charged with anything. It was demanded that he get physical therapy and healthy food and the family be educated. It turns out they just didn't know how bad things... |
How exactly does cyanide kill? Is it painful? | I'd like to plug /r/depression and /r/SuicideWatch just in case someone comes here for the wrong reason.Cyanide has a stonger affinity to bond to cells than oxygen, thus inhibiting cells from utilizing oxygen, halting cellular respiration [Link]', "Cyanide inhibits an enzyme called 'cytochrome c oxidase', which allows ... |
Why are there specific rules about going faster in the left lane when everyone there is inevitably speeding? | It's not about how fast you're going, it's about not impeding traffic. The left lane is for passing, not for traveling in.There is a minimum speed limit too . If you are going to be traveling at the minimum speed, the left lane is not for you. Faster traffic, which technically can be just going the maximum speed limit ... |
What happens to batteries when they stop working? | All electrochemical batteries work in more or less the same fashion. At each end of the battery is an electrically conductive electrode. Each electrode is in contact with a liquid electrolyte. Chemical reactions occur at either electrode involving the electrode material and the electrolyte. The reaction at one electrod... |
Why is it impossible/does it hurt to close your eyes part-way over your pupils, without closing them fully? | So just tried this out at my desk. Closing my eyes halfway caused no pain at all and left me feeling perfectly normal. However I also noticed that the first time I tried it I also ended up crossing my eyes and leaving them that way as part of the process, probably as part of focusing on “something close”, i.e. my eyeli... |
How does jumping work? | Inertia! when you crouch down to prime for a jump, you're lowering your center of mass. When you extend your legs to actually jump, they can only push you as far as they are long Inertia takes over at this point. Your mass, previously lowered, is now moving upward at a rate determined by your legs' extension. Since you... |
what is the most appropriate way to wish “happy holidays” to someone celebrating Ramadan? | Im a very blunt person id just be like whats poppin b, listen i think your kinda cool so i know ramadan is coming up. How do i tell you halpy holidays. That way they know what you mean even if its like the wrong word and you learn for future refrence. |
How does nitrous oxide makes a combustion engine run like a bat out of hell? | So an engine is at its most basic an air pump. The more air it moves the more power you get. Now without getting into specifics an engine can only move so much air before it hits its limit. There are options here buit you asked about Nitrous so well use that one. Nitrous Oxide is N20. Nitrogen and oxygen. When it is pl... |
Why do people fill empty space between words with "uhh" and "umm" instead of silence? | To let you know that they are still talking. In a polite conversation, when one person is silent that is usually seen as permission for the other person to talk. If I stop talking to think of a word, you might take that to mean that I am through talking. If I keep making noise, you know that I am still talking.To stop ... |
How did Hitler come to power? | Germany was broken after WW1. Their economy was in ruins, their people were looking for leadership, and they were looking for a reason to be proud of themselves again. A disparaged population is a moldable population. Hitler came along and promised to restore Germany to it's former glory. He did it with compelling spee... |
Does this mean I could start making my own Redskins T-shirts and they couldn't stop me? | Not really. The company can still sue you as protection of their intellectual property, a registered trademark just makes it easier to defend. Since the Redskins have been using their trademarks for a long time and are well-known as the owners it SHOULD be an easy win for them, though that really depends on the courtsE... |
Why is it that the major car exporting countries (germany, japan, italy) are WWII Axis countries? | What about the USA and France? The Brits also make cars, as do several Eastern Euro countries. Germany was making cars well before World War II and have a strong manufacturing base. Japan was rebuilt by the US and companies like Toyota basically owe their existence to the US in the 1950s. Then they improved on the US's... |
Can Liberland recognized as a legit country? How can you found a country? | Sure, Liberland "Can" be recognized, but its unlikely any of the neighboring countries will do so. Which neatly ties in to the second question. One founds a country by convincing the other countries that you found a country. A countries laws, passports, and borders mean nothing if no one respects them, or acknowledges ... |
Why can I talk for hours but as soon as i sing for a few minutes my jaw hurts. | You're using incorrect singing technique if your jaw is hurting; one of the first things my teacher taught me is to let go of all muscle tension in the shoulders, neck, and jaw. You shouldn't struggle to sing, just let it our naturally. Takes practice though. |
What causes the little black dots when focusing on a bright blue sky? | They're called [floaters], and they're debris and other stuff floating around in the fluid inside your eyes. The fluid in your eye is a solution of mostly water, with some stuff dissolved in it. As you age, some of that stuff begins to drop out of solution. It becomes a solid floating in the fluid, which you're able to... |
Why do we become dizzy or dazed after standing up quickly? | When you stand up, the body has to adjust to the new position so that blood can reach the brain. However if you stand up to quickly, the body doesn't have time to adjust blood pressure to let the blood reach the brain, resulting in dizziness and light headedness. |
How do/did people get self-educated? | There are two issues with the question that need to be defined. 1) what is the state of being educated, and 2) what is the process of self-education? What is the state of being educated? * It is a formal document indicating an achieved level of leaning? * Is it an achieved level of professional proficiency due to on th... |
Why do we still have SD TV channels when HD looks like SD on an old TV? | The way it works is that old TV stations got a certain amount of bandwidth to replace their old analog TV stations. However, HD takes up more bandwidth then SD - so the stations can choose between 2 or 3 HD stations, or like 7 or 8 SD stations They can do a bunch of SD stations and make more money in advertizing by run... |
How come former British Colonies do not have nobility? | The British Empire did not grant Lordships to those who ruled or owned land in their colonies and by the time those countries gained independence they had developed cultures without nobility. |
Can you touch or see a vitamin? Does it have a shape? If I opened up a tomato, could I find the vitamins? | Vitamins are chemicals. Touch salt water. You've touched salt dissoved in water. Touch lemon juice, you've just touched vitamin C dissolved in water. Alot of other vitamins are water soluble.1. Yes. Source: went into my kitchen and opened up my bottle of vitamin C tablets, and I could touch and see them. 2. Yes, in the... |
Why do different planetary bodies end up composed of cores, crusts and atmospheres of potentially vastly different chemical compositions? | Size and temperature are the big players. Big planets have enough gravity to trap gasses in. Cold planets don't need as much gravity to keep gasses in. |
Why can some autistic people seem neurotypical? | Autism comes in several types and a wide range of severity. It's possible that the "autistic people who don't seem autistic" are either mildly affected, have a non-classical type, or both. Another possibility is that they seemed "more autistic" when they were younger, but have learned strategies to try to appear more n... |
What is the reason for the firing orders for engines? Why not cylinder 1,2,3,4, etc? | The idea is to reduce overall vibration of the whole engine. If the order went 1,2,3,4, that would set up a front-to-back oscillation i.e. the whole engine would shake.By firing cylinders that are next to each other in sequence, you put extra stress on the crankshaft - having fired the front cylinder, you'd then be fir... |
In a deck of cards why is the card called a jack and not a prince? | Because it represents a knave , not a prince. _URL_0_ > As early as the mid-16th century the card was known in England as the knave . |
Why does chewing gum get " harder " if you drink water while it's in your mouth? | Chewing gum is made of rubber. Rubber gets softer when heated, and harder when cooled. When you're chewing on your gum, it is pretty close to your body temperature , so it is fairly soft. When you drink something colder, like tap water or a refrigerated beverage, the gum cools down quickly and gets harder.My thought wa... |
How is the age of earth calculated? | Radioactive dating. Certain nuclei decay over time, and they do so in a very predictable fashion. We can used their activity levels to determine how old they are. |
How is time measured in space? | Traditionally, time is measured in years and days . However, these durations are for our convenience and have no real, universal significance. Astronauts living in space still use days. For instance, on the International Space Station, the astronauts use a day/night cycle that's based on the time in England . Now, if y... |
Everything going on in Ferguson. Beginning to now. | Unarmed kid got shot by the police. People angrily protested. The police got pissed. The protests turned into riots. The police continue to escalate to respond to the riots. The rioters aren't backing down, so the FAA declared Ferguson a no fly zone earlier today and now they're rolling out tanks into the streets of Fe... |
What determines the direction something floats in zero gravity? | zero gravity technically doesn't exist in our universe, as gravity attracts all masses to each other regardless of distance . zero-g is the term used for perpetual freefall of something in orbit. You basically have such a high horizontal velocity that you are always falling around something else without crashing into i... |
Why do all airplane seats need to stay upright during takeoff and landing? | Take-off and landing are the most dangerous part of any airplane ride. As such, precautions are taken so that if the worst case scenario happens and something goes wrong during take-off/landing, we minimise the damage. Being upright and locked into place, means the seats are better at absorbing shocks and people can br... |
What happens in our bodies when we sleep that enables healing and regeneration to take place faster? | I honestly think this has more to do with the fact that you go a full 8 hours without looking at your cuts when you sleep than anything else. It's like watching kids grow up. If you're around them all the time, you hardly notice, but when you're away for a long time, they look much older when you see them again.to the ... |
Do we use a base-10 system simply because we have 10 fingers or is there another, more practical reason for this? | That's it. If we had 16 fingers, we'd use a hexadecimal system.No counting system is necessarily any "better" than any other. Many civilizations have not used the base ten system, but the reason base ten won out was more due to the introduction of the Hindu-Arabic numeral system and the "invention" of zeroWould be a lo... |
How is it possible to sleep with one eye or both eyes open? | My uncle sleeps with one eye open and he claims it's because he was trained as a ninja and is always prepared. Me making silly faces and even coming in with a ski mask and machete disproves his theory", 'I often sleep with one or both eyes open. I don't know I'm doing it and nothing I "see" registers while I am sleepin... |
How can I explain the basics of using a computer to an inexperienced person? | Use metaphors that refer to things she is familiar with. E.g., you can think of the mouse cursor as being a virtual finger that you use to point to things. . Also, [the desktop is itself a metaphor for a literal desktop]. |
Why does my 100% wheat bread take longer to toast than my normal white bread? | Wheat bread is denser. Example: Try to light a cotton ball on fire. Sure it lights on fire as is, but want to make it light on fire faster, stretch it out and lower the density. |
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