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Why can't you just remove the wires from a bomb in order to disarm it? | You're assuming you can see and pull the wires in question. What about wires you don't see or can't reach because they're secured under a metal plate? What about wires that you can't pull fast enough because circuits can be setup so that the collapse of the circuit creates a feedback loop that signals the detonator to ... |
How did Amedeo Avogadro come up with his Avogadro's number in the 1800s? | He didn't. He *proposed* that a given number of particles of a gas occupy the same volume regardless of other properties at the same temperature and pressure. More particularly he said that a fixed number of particles of gas occupy 22.4 L of volume at standard temperature and pressure ie 0 celsius and atmospheric press... |
Why do guns recoil upward rather than downward? | It's because the force output by the shot is above the guns center of Gravity causing it to spin in that direction. If you hold that save gun upside down it would recoil downwards. Certain revolvers known as Underbarrel Revolvers have barrels that are closer to the guns center mass which significantly reduces the verti... |
How are people who are in jail/have charges on their record affected when laws change and that crime is no longer punishable? | Most states have implemented a process in the legalization laws that allow for expunging certain violations, usually if under a certain quantity and if it was categorized as nonviolent. Some do it automatically via a review process, some may require petitioning the court. Some prosecutors may drop the charges because i... |
How do scientists know what dinosaurs sound like? | Scientists aren't really interested in that question. Too remote is any accurate answer, and too little the gain. The moviemakers are the ones who are interested, and even if they had an honest-to-God recording, they'd romanticize it just like they romanticize the dinosaur feathers away. |
What is meant by the 'corporate debt bubble' and how could this bubble destabilize the economy? | Too many companies have more debt than they can hope to pay back if circumstances change even slightly. They could find themselves rendered worthless and insolvent overnight. It wouldn't just destabilise the economy if the bubble popped, it would blow it out the water; there's no money for bail outs this time around. |
Why were the banks and not private citizens bailed out at the last financial crisis? | What mechanism are you proposing? We barely managed to prop up a few banks and insurance companies; government's resources are huge, but not infinite, especially when dealing with systemic problems in real time. Good example is the FDIC. They insure all US banks, but if more than a few large banks fail, they'd quickly ... |
What causes the economy to go into a depression? | This happens when money has been incorrectly allocated to non-productive investments for a long time, and finally the consequences become apparent, and huge amounts of economic activity halt at the same time. In other words, it's the pendulum swinging the other way from an irrational economic boom. In theory it can als... |
What is the feeling that comes in the morning of not being able to clench your fist, and why does it happen? | _URL_2_ _URL_1_ _URL_0_ _URL_3_ Edit: I'm enjoying all the people who are applying some emotion to my posting of four links of the same question. If it was a genuine question and you wanted it answered, those threads include answers which have been researched / explained already. Would you be happier if I stole the top... |
Why do you get tired after eating a big meal? | The way you survive and take energy from food is the same process that happens when you burn something. Your body is essentially *burning* all your food inside itself to get the energy out of it - and just like using a lighter to start a fire, you need to put in a little energy to get the whole process stated. That's w... |
Why does the US have such a small amount of train routes compared to Europe? | The US used to have many train lines for passengers, but the interstate highway and the jet age killed them off. We move cargo but not people because, between cars and planes, it's just cheaper or faster to go that route. & #x200B; The US used to have many train lines for passengers, but the internstate highway and the... |
If the earth’s gravity keeps the ISS in orbit around the earth, why don’t astronauts feel a small force of gravity within them rather than weightlessness? | We don't really feel gravity. What we feel is the force of the ground pushing back at our feet as gravity pulls us towards the center of the Earth. And our feet pushing back at our ankles, and our ankles at our knees, and so on. Absent something pushing back at us, we don't feel gravity's effects. So on the space stati... |
Why do trials for new drugs need placebo patients? | Every experiment needs a control group. This group is meant to have identical conditions to the other group but without the one factor you are studying. In the case of trial drugs, if the group receiving medicine is getting therapy in addition to the drug, then the control group gets the therapy and a placebo in order ... |
why is i5 better as a gaming CPU than i7 ? | Having a CPU better than an i5 tends to be a money-sink in a gaming PC: Most of your system's processing will likely be through your GPU , and as long as you have a graphics card and not an Integrated Graphics Chip your CPU shouldn't be pulling up the slack unless you're also recording/streaming on the side. EDIT: Ther... |
How do deep ocean creatures survive under so much atmospheric pressure? | They're born in the extreme high pressure, and so they're born without organs containing gas or liquid that could burst, and they're small and soft. When taken up to the surface, they decompress and look like jelly because their bodies are adapted to the high pressure atmosphere. |
why is food done faster in a pressure cooker? | There's the increase in boiling temperature which has been mentioned, but this only explains the case when the food is in the water. Now if you're using the steam to cook your food, higher pressure also produces an increase in thermal conductivity of steam, meaning you transfer more heat to the food at a given time. Yo... |
What is negative birefringence and how is this observed under polarizing light microscopy? | Okay - Polarization is the direction that a wave vibrates. If a wave is traveling along the Z-axis, then it can be polarized in the X-direction or the Y-direction. Refraction is when light bends when it enters a new material - you see this all the time when you look see a straw in a glass of water and the straw appears... |
what exactly are stem cells and why are they so important and controversial? | Your cells in your body all have a purpose. Blood cells are nearly useless in the stomach, bone cells have no use in the brain. However, your body does have cells essentially in reserve that don't have a purpose yet, and can take whatever form is needed. This can be super useful in the medical field, as it can be used ... |
Why do you not have to refrigerate individual servings of coffee creamer? | UHT pasturazation. The result is a shelf stable milk that doesn't need to be refrigerated. Where I live, shelf stable milk is the standard , and it holds for like a year without refrigeration as long as it's sealed. Coffee creamer cups are treated this way, but the cartond that you buy in the grocery store aren't. |
Why do people say “He died for our sins”? | Because people need a loophole that can be treated as a ticket to heaven regardless of whether they sinned or not. Assigning the responsibility to a character attributed to a very remote past time effectively creates a free pass, since your sins are already paid for by someone long ago. A convenient way to excuse onese... |
Why does water make things slippery, but licking my finger helps me pull out a cigarette or turn a page? | It has to do with the amount of water. In small quantities, water is actually sticky. That's what gives it surface tension. But in larger amounts, the water can separate two surfaces. The water sits between them and reduces friction, allowing them to slide past each other. Your finger would have only a small amount of ... |
How does an atom actually work? | > We've learned that electrons behave both as particles and waves This is an outdated notion that was popularized in the early days of quantum mechanics but was never fully developed . Instead the modern view is that the motion of paritlces is probabilistic and the statistics are described by Quantum Mechanics. > But w... |
Before MIDI, how did musicians time the beats exactly right? | The traditional method, for musicians lacking a natural great sense of timing, was to use a metronome. That's a swinging pendulum, or electronic device, that automatically generates a regular beat.The drummer is often listening to a click track on their headphones while they are being recorded. The click track keeps th... |
After you drink something carbonated, why does it hurt to burp through your nose but not through your mouth? | It's not the carbonation, it's the acid I think. Carbonation is just CO2, the same thing you exhale all the time. Your gullet is better suited to acid mist than your respiratory tract. Your nose is part of one but not the other. Your mouth is part of both. |
If you cut something on the atomic level will it cause a nuclear explosion? | Splitting a single atom releases a considerable amount of energy on the atomic scale, 200 million electron volts from splitting a uranium atom, but that isn't much energy once you convert it to units on scales we care about Nuclear explosions happen because we pack a lot of atoms together and make them all go off at on... |
What makes waterboarding so terrible? | I was making a shitty movie with some friends and needed to be waterboarded in a scene. This was without being tied up and just the basics, nose held closed, wet rag in my mouth and water being poured over my face.. Seems so easy but I couldn't actually last more than about 5-10 seconds even though there was no real da... |
Where does the iron inside an apple come from? | It comes from the ground. It's dissolved in the water that the roots pull up from the soil. Soil normally contains a small amount of iron. |
If 95% of the ocean hasn’t been explored, how do we know where the deepest point is ? | Well, we think we know, based on sonar readings, but there's some uncertainty as to the exact points and what's down there in all the major oceans. There's actually an expedition about to start in December to check the low points of all the oceans out, as detailed in this article [here] |
What is the point of converting an animated movie or TV show, specifically in the drawn cartoon style like family Guy or Simpsons, into Blu Ray? | I'm not sure from a technical stand point . But companies do it to be able to make money on a 'new' product without having to come up with a new show |
What are the historical reasons leading to beer being so much more popular than other alcoholic drinks? | Beer is practical. If you're looking to get drunk as fast as possible, you'll go for shots. But most people don't do that. Most people look for a beverage they can enjoy for more than a minute while they're catching up with a friend or are just out in the bar having fun. It just lasts longer than any other alcoholic dr... |
How do services like Netflix or Hulu know if an original show is profitable? | It's all ratings. They are monitoring literally every second of every show that gets watched by everyone. The more eyes on it, the more profitable it is. |
Who owns domain names? | Nobody owns domain names. OK, so .com and .edu are owned by organisations, but [_URL_4_] and [_URL_2_] are not. Basically, there's a big international database of all the domain names that currently exist. If you want to register one that already exists, then tough. You can't. But if you want to register one that doesn... |
Why is it so much easier to balance on a bike/scooter while moving versus standing still | This is the best explanation I have found so far. The bicycle is a self correcting system, when moving, the handle bar moves almost freely; the wheel below moves with it and because it is angled forwards it will try to turn to the side the bicycle is leaning. This is, if the bicycle top side leans left the wheel will t... |
How do USB splitter hubs work? How do multiple devices simultaneously transmit signals through a single port without stuttering? | Ah, my friend. Welcome to the glorious world of packet switching serial communications networks. Multiple devices connected to the same hub do indeed share the same electrical connections , so if you don't want garbled communications only one device can transmit at a time. In USB this is done by having the host control... |
What is light and why does it move slower in a non-vacuum? | Light is made of photons. These move only at the speed of light. However, in a material, the light interacts with the electromagnetic field of that material. This *interaction* behaves like a particle with mass, and as a result must move slower than a photon. It's not the light itself, but rather the interaction create... |
What happens in the brain during a panic attack? | Sorry to trouble anybody here but I've had a question for some time that nobody has been able to answer. Do panic attacks, over time, cause noticeable heart damage? Heart attack? |
How does NASA learn about far away planets? | When a planet passes between the star and a telescope, it dims the light a little. That dimming gives an appropriate size. The frequency of the light dimming gives the orbital period. Once you have size and period, you can do the math to get a size range. And then you can infer from what's known about our planetary nei... |
What are the uses for white pencil crayons? | An unintended use for them is marking metals in workshops. Some shops will use soapstone or chalk, some will use white crayons or white pencils. As mild steel is usually quite dark, using sharpies makes the marks not super visible, and chalk is sometimes not precise enough, so you use crayons and pencils to mark your c... |
What is the reasoning behind the effects of adrenaline, why is it such a powerful thing and why can’t we “activate” it whenever we want? | Adrenaline in sustained doses is really bad for your body. Survive what is threatening you, that's all it's for! |
Why does the USA have a passenger rail system of a third world country? | Because rail is extremely expensive and is mostly unprofitable without massive public support. When car ownership is high, the market for air traffic is highly developed, and the road network is good it's just really, *really* hard to build a high speed rail line that's competitive. Depending on the route, rail in the ... |
How come we can`t consciously control adrenaline? | Adrenaline puts your body in an overdrive stare, if maintained over a long time, it's not good for you. The cells that produce it also have some in storage for a ready and quick release. Having conscious control would open the chance for you to misuse it: you would either use it too much, which would have negative effe... |
Why can't everyone just buy low and sell high? | It's not possible to predict when stocks are going up or down. Google's stock has ranged from $1000 to $1250 and back to $1000 over the course of this year. That said, investing in big companies and waiting for years is a well known strategy & considered fairly reliable over the long term. The downside is that, since i... |
What happens when something turns septic? | I'm confused by the question. Do you mean 'how does something turn septic?' Or do you mean what happens after the event? The first answer is bugs do the nasty in your body. The second is you either die, or you get treatment. |
Why do our eyes get heavy when we’re tired? | Muscle fatigue! At the end of a long day of looking around, blinking, reading things etc. The muscles in your eyes become tired. It's just like if you worked out all day, then asked yourself why your biceps are so worn out", 'You have muscles in your eyelids that keep them open. Some of these muscles are skeletal muscl... |
How does a bank refusing my cash payments prevent money laundering? | You could have stolen the cash. Or forged it. Or taken it in exchange for drugs and stuff. And the bank has no idea who you are, so they can't trace you. Whereas if you pay with something other than cash, you're traceable. At least, that's the theory. There are workarounds. A lot of security is merely about adding inco... |
What makes something beautiful? | It's interesting and very difficult question you ask. Aesthetics is actually one of the primary branches of philosophy (up there with truth, knowledge, and language. |
Why aren’t babies born immune to every illness their mother is immune to? | The mother's antibodies last until the baby is 3 months. That is when the baby start building their own. Read up on hematopoiesis. |
Why is it that according to _URL_0_ my download speed is 50mbps, but my download via the Windows store is averaging 2mbps? | Simply put, your test is downloading from a _URL_3_ mirror server, not the Windows store server, so your test is mostly invalid. Your connection may be capable of 50mbps but that doesn't mean the Windows store can upload to you and everyone else at the same time with that kind of speed.Try every test you can. Certain p... |
In an age of digital currency, how is new money “created”? | If you are really interested, you can read Modern Money Mechanics. It's written by the federal reserve and explains the process in great detail.The Federal Reserve Bank of New York buy bonds on the secondary market. These are usually US Treasuries, but they can also be mortgage-backed securities, for example. It gets t... |
Why does romaine lettuce get infected with e.coli when other types of lettuce (e.g. iceberg, mixed greens) never has e.coli outbreaks? | One reason is that romaine's leaves are loose, allowing in the contaminated water whereas most other types of lettuce have leaves that are tight, preventing water from entering", 'It is from the fertilizers used. And other lettuce kinds, cabbage, etc are all commonly contaminated. Spinach is notorious for being contami... |
How can a half built, completely open plywood house frame be fine after sitting open during terrible weather? | If a tree branch falls in the woods, it will rot and turn to dirt. But has to be wet enough for long enough, over and over for years. A few rainstorms aren't enough to rot wood. |
why is it so common for some women to get postpartum depression after giving birth? | Hormones trying to regulate. And from personal experience, it's really easy to lose yourself in all the craziness of a newborn child. They are incredibly demanding and you feel like you have no time for yourself anymore. Your body now looks completely different and you still look fat even though the baby is out. Edit: ... |
Why does an injury (cut or scrape) hurt more once you look at it? | Personally I think it's the fact that you see it now its real like when a loved one or relative die it doesn't seem real till you see the body |
Why is AIDS almost impossible to cure? | The virus strain mutates to match your DNA and becomes your own personal strain that takes out your white blood cells. To cure all AIDS patients would require a cure made specifically for an individual's strain they have |
what is Credit Score and how does it work? | Credit score is a metric that helps financiers determine your risk level. How it's evaluated depends on borrowing patterns how often you take out credit, how diligent you are on paying on the maturity date. Not sure of the exact formula they use, it might also depend on the institution your financier uses. |
During first contacts, why is only the native population at risk for decimation from unseen diseases and not the foreigners? | It's a case of numbers. Usually first contact, such as with the Sentinalese, is a small group of people contacting the *majority* of the native population. The contact group could very well contract a disease from the native population; some think this is how syphilis was introduced to Europe, for instance. But the nat... |
Why did USA adopt chip and PIN but never implement the PIN portion? How is this system better than the old non-chip cards if we don't use a PIN? | The biggest benefit is that chip cards can't be cloned or used online just from the information communicated during a transaction. While PIN cardholder verification would be a small protection against fraud by stolen cards, there is also strong pushback against using PINs.What? My chipped card needs a pin to use. |
How are electric cars better if they draw power from the national grid which is mostly powered by fossil fuels? | As the others pointed out, renewables are a factor. Another factor is that large power plants can be built to be far more efficient at converting dead decayed dinos into usable energy. For drivers in stop-and-go city traffic, the fact that the car is using pretty near no energy while stopped in traffic also helps effic... |
why is GM cutting jobs and closing factories in North America? | They're closing factories that make their worst selling cars. In this case, it's the Chevy Impala and Cadillac XTS, which share the same platform. These models are not selling well because over the last decade consumers' preferences have clearly shifted towards trucks, SUVs, and crossovers, which are much more profitab... |
Where does the wax in candles go? I understand that it melts, but as a candle works down does the wax just turn into gas and evaporate? | Yes, wax is fuel. Burn candles indoors on an regular basis and you'll get soot deposits in your ceiling as a signifying waste product. That's why whales were hunted for their oil < 200 yrs ago. Certain types of whale oil produced candles that burned like 99% clean, no soot. |
How can we say smallpox is eradicated? | It doesn't exist in the wild- or, at least, in such a small population that it's near impossible that it could spread. Sure, people could in theory contract it, but there's no place for it to come from outside of heavily controlled labs. |
I’m ADHD, why do energy drinks and coffee calm me down as opposed to hype me up? | IIRC, People with ADHD tend to have a deficit of the 'pleasure chemical' dopamine. You are chronically under-stimulated because your brain doesn't have enough 'happy juice'. This leads your attention to wander in search of novel and stimulating things, or cause you to move around and fidget in order to try and wring ou... |
What is happening differently in the mind of someone with schizophrenia when they hear a real noise v.s an auditory hallucination? | Can't answer from the perspective of a scientist, but I can answer from someone who experiences auditory hallucinations as a result of of Schizoaffective Disorder. When I am having an episode, I can always logically understand that what I'm hearing isn't real, but it feels so real that it doesn't even matter. It sounds... |
can anyone help me understand this article a little better? [Dads, Too, Can Pass on Mitochondrial] | I'm also quite curious what your specific question is. Most people have covered this topic very thoroughly, but I can at least shine some light on the conclusion of the article. Essentially if a couple is having difficulty conceiving, and there appears to be an issue with the egg cells mitochondria, they used to provid... |
How is stainless steel made, and why is everything metal not made of it? | Stainless steel isn't the easiest steel to weld. You have to make sure you have the right carbon content to be able to weld, and the welder has to learn specific processes for each type of steel.Not sure exactly how it’s made, but I can tell you that it can be heavy, expensive, and not always the hardness you’re lookin... |
did Native Americans pass disease to European settlers? | Diseases come about when people live with animals. Diseases are originally meant to just live inside animals, some help the animals some don't do anything. It's when a disease gets inside a person that stuff starts getting dangerous as it thinks it's in a animal, and will act like it. Because the native Americans never... |
Why do space craft landers need parachutes if there's no atmosphere? | There is some atmosphere on those celestial bodies. The parachute is there to help though they are less effective than if they were on earth. Usually the craft using landing thrusters for the moon and from what I have seen for Mars they use the parachute along with essentially an inflatable hamster ball to land on the ... |
Definition of a parsec for an amateur astronomer | Just as an aside if you're asking because of what Han Solo said in the original Star Wars movie, the line was a mistake. Parsec is not a unit of time. It's a unit of distance. |
Is wearing sunglasses in professional poker illegal/against the rules? If so, why do players in televised poker sometimes wear them? [Sports] | No it's not against the rules. As you say, people wear them and they aren't told to take them off. |
Germany currently contribute the most in European Union budget, giving directly more money than they receive. How is it profitable for them? | Germany is in many ways the biggest beneficiary of the EU: It's a manufacturing-heavy export economy, so having free trade in the region is hugely helpful to the country's economic success. Also, ensuring the health of the countries around you makes sure they stay stable and full of prosperous customers/healthy supplie... |
US debt/loan credit system? | People who conduct credit based transactions in the US are assigned a 'credit score' by three privately owned credit bureaus. The credit scores are supposed to be a rough estimate of the 'creditworthiness' of a person, where a higher score means the person is more likely to pay the loan back and thus can qualify for la... |
Why do people die from alcohol withdrawal? Couldn’t they just slowly taper off to avoid withdrawals at all? | As a man who has come off alcohol in a hospital settting there are many ways to die, your heart giving out because my blood pressure was insane and my heart rate was higher than a good frame rate for a 144hz monitor. Seizures are a big problem do to that and do to your heart rate they pump you with tons of benzos, gues... |
Can one infinity be larger than another? | Relevant wikipedia articles: _URL_1_ _URL_0_ Under the definition of relative size being a bijection , Cantor proved that certain infinite sets have different sizes . |
What's the difference between a street, a road, place, lane, boulevard, avenue? | Doesn't this change from city to city, country to country?", 'The width, location, and features such as sidewalks number of lanes and medians determine the difference. Road is between towns. Streets are in cities. Lane is a narrower road/street with no shoulder or median Boulevard is a wide multi-lane street with lands... |
Why do clothes feel wet whenever they get cold? | It's a combination of evaporation and the fact that water is a great conductor of heat. It pulls the heat out if your body which causes evaporation which cools the water which pulls more heat out of you. There is a limit to this, though. If you wear a cotton t-shirt while exercising on a hot humid day, the water can't ... |
How do the same programs run on different operating systems? | Depends on the program, but the ELI5 answer is programs talk to the operating system using something know as APIs, the Windows APIs are pretty different than the Apple APIs, and the Apple APIs are mostly the same as the Linux APIs . For example both Windows uses DirectX for 3D programs while OSX and Linux use OpenGL, f... |
How is the death of American John Allen Chau viewed by other Christian missionaries? | Christian here, I'm not a missionary but I will convey an opinion from a guy who has done mission work. It was a stupid thing to do, Part of mission work to do research about the people there. There is virtually no knowledge of these people's language, which makes mission work difficult, secondly most of the encounters... |
Why are so many countries accepting China's loans/projects that can easily trap them in debt? | China aren't trying to trap them in debt they're trying to increase their political influence in the UN by buying countries but also turning Africa into the new China because China is generally becoming more educated so labour costs increase and there's resources there that'll most likely go to China in some sort of re... |
Why did they jump from Windows 8 to Windows 10 and skip 9? | The number 9 is quite an unlucky/cursed number in East asia, both having slightly different but still negative connotations in China and Japan. With a huge Asian market, Microsoft doesn't want to miss out on a mass amount of sales just because of a superstition so they skipped 9. The exact same reason there isn't an iP... |
If the Earth's average temperature is rising, why has winter gotten colder in some places? | Temperature is complicated and local weather doesn't really reflect a global change. Take the gulf stream for example, which is giving europe a milder climate than it ought to have due to its geographical location. If for some reason the global temperature rises, the ice caps melt and the stream is diverted, temperatur... |
Why do people who usually wear glasses look very different without them even though you can see through their glasses? | In addition to what features they may cover they also have the effect of artificially changing the appearance of the head proportions, simply by where they sit on the face, how wide they are etc. e.g. if you look at someone with a small set of lenses that only just covers the eyes, and doesn't obscure the sides of face... |
Why does the world seem so quiet when it’s snowing outside? | Air trapped in between snowflakes attenuates vibration so snow absorbs sound lowering ambient noise. That's why it's so quiet when it snows.Add to all of the physical effects already described, that the motion of snow makes us psychologically anticipate sound, since when things move they usually create sound. This psyc... |
What is "Mansplaining" and how do you identify it? | If you assume someone doesnt know what they are talking about and they need an explanation in simple terms, because they are a woman you're mansplaining. |
Why Venezuela is collapsing since they're an oil rich nation; what went wrong? | You will hear a lot of people saying it's oil prices. It's not. Venezuela was starving in 2012, when oil was over $120/bbl - _URL_0_ Price ceilings cause shortages. Econ 101. If corn costs $2/bushel to grow, but you are only allowed to sell corn for $1/bushel, how much corn would you grow? **Zero corn.** This occurred ... |
How is it possible women can have periods when they’re pregnant? | Without some really edge case biology outliers to make this possible, women cannot have their period while they're pregnant. It is common-ish for there to be some bleeding and cramping that may look and feel like a period, but is actually pregnancy complications that should probably be looked into by a Doctor. |
How tf do you eat a mango? | Thank you all for your help but it seems that my mango is to blow up and it seems that it's spoiled. |
why does eating too much sugar cause diabetes? How does this happen? | It's not eating only too much sugar, but also carbs, which are turned into sugar. So that glazed donut is spiking your insulin twice : once for the sugar glaze and once for the carbs that are the donut. /r/keto to your rescue, BTW. |
What is RESTFUL API and how does it work? | It's RESTful API, the capitalisation is important and we'll get to why in a sec. Let's break this down into smaller parts. An API is a way for two different applications to communicate. For example you want to build an application which shows the current weather, you will use the API of an online weather service to req... |
Why balloons lose the air within them over a few days time? | A combination of the rubber being semi-permeable to air and some air leaking through the knot, due to the pressure applied to the air inside the balloon by the rubber that wants to shrink back down to its' original size and the atmospheric pressure outside of the balloon to boot. |
Why do some car companies offer AWD but only when paired to an automatic transmission? | Think of a modern AWD system as an advanced traction control system; sensors detect wheels are slipping when they shouldn't be and then a signal is sent to cut the power to the wheels. Instead of simply cutting power, an AWD system will regulate the amount of power being sent each wheels. To do this the system needs Go... |
If newer bills are harder to counterfeit due to advances in security measures, what would stop counterfeiters from faking older bills that aren't as secure? | In the UK when a new style bank note is introduced, after a period where both old and new are in circulation, the old style is withdrawn from circulation and no longer recognised as legal tender. For a time ordinary banks will exchange them for you, but after a while even they stop, and you have to go to the Bank of En... |
Why Did the SR-71 Replace the A-12? | If you're getting these top end speeds 3.3/3.35 from Wikipedia, then they're wrong. These aircraft use Turboramjets, where the only limiting factor of speed is is how much heat the engines and the airframe can handle until it starts to disintegrate. In reality, they can go faster than these publicly listed speeds, but ... |
Why does watching movies at 24 FPS feel a lot smoother than games running at 24 FPS? | Movies typically use a camera shutter angle of 180 & deg;. This is just cinematography terminology that comes from rotating shutters meaning that the shutter is open half the time, i.e., for a 24 & #8239;fps movie, the shutter speed is 1/48th of a second. Such a slow shutter means that moving objects have motion blur w... |
How does smoking cause asthma? | Doesn't really cause asthma, but it can precipitate an attack. There are a ton of things that go down physiologically when you smoke. I think though whats agonizing the asthma here is the disruption of the mucous membrane and irritation of the bronchioles which will constrict. The smoke can also affect the alveoli caus... |
Why are home solar panels considered such an ineffective solution to energy and environmental challenges | Well, I don't think they are inefficient from the viewpoint of the homeowner. However, some criticisms of them are: 1) Homes are not necessarily located in a place that is the most efficient for solar energy gathering/production. While houses are generally built with an awareness of how sunlight falls in that latitude ... |
Why does walking up stairs feel the same (generally similar) for everyone (who can) regardless of height? | Given that people tend to trip when there's a single stair a different size in a staircase, I would guess that this has more to do with our brains being able to repeat a mechanical movement with consistency. The first step or two informs you how high each step is, and then it just goes to autopilot. |
The Lymph System kills dangerous cells, so why doesn´t it kill cancer cells? | The immune system kills cancer cells all the time. Medication that suppresses the immune system increases the risk of cancer. Transplant patients take drugs to prevent their immune system from rejecting the new organ, their risk of cancer is about double]. That means that the immune system destroys at least half of all... |
When electricity goes to ground, what actually happens to the electrons? | The electrons charge up the Earth. However, the Earth is large, so it doesn't make much of a change in potential. It's also possible to pull a practically unlimited number of electrons from the Earth. |
How do nuclear fusion reactors generate electricity | A fusion reactor would, probably, generate electricity by the same method as a fission reactor - that is by heating water and turning a turbine. & #x200B; I say probably, because they're not in active use yet. There are fusion reactors running but they currently take more power to run than they generate, so are not gen... |
Why does Military personnel come home wearing uniform? | Most are returning from/to deployments like it's been stated already. Rest are regular duty people looking for attention and are not actually traveling to or from a combat zone. They want you to know they are in the military. Every chance I got to travel in civis I took it. I'm not one to crave attention in an airport.... |
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