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During a siege on a castle, why didn't defenders make more stone walls behind the gate? | There's a story about Ghengiz Khan . He had a method of psychological warfare to resolve sieges. When his horde arrived to besiege a city, they'd put up a white tent. While the white tent is up, a city can surrender and all of it's citizens can leave unharmed. After which the mongols plundered the city. When Khan's pat... |
how do stocks, shareholders and investors work? | You wanna make a lemonade stand, coz ur only 5. To do that, you need to buy some lemonade first, but you got no money. You have 2 choices: 1. You go to a bank and borrow $100, and you promise to return them $101 next week. . 2. You go to your parents and they give you $100. However, instead of asking you to pay them ba... |
How is it possible for a particle which is quantumly entangled to another particle to "know" at FTL speed about a change happening to its twin? | In order for the two particles to be entangled they had to be created as part of the same process in the same place. If they then travel apart no information needs to travel between them as it's already intrinsically encoded. It's just the collapse that happens at a later point in time. |
Why or How is there a helium shortage? | It's rare, it's nonrenewable, and the government is mandated to sell it's reserve off by a certain date, leading to an artificially low price that encourages waste.It is a very small part of the atmosphere because it easily escapes into space. It and Hydrogen are the most abundant elements in the universe, but not on E... |
If people with high incomes (the rich) are taxed at a higher % than a lower income, how come people say these new tax laws only make the rich, richer? | Really rich people aren't people with really large salaries, they are people with really large investment portfolios. No paychecks there, so the tax is just what they pay quarterly. There are zillions of loopholes, put in at their request, so it's not at all the same as if they just got $50M paychecks every week with m... |
Do petitions actually change anything? | It's a way to draw attention to something. If a huge number of people agree with you about something then maybe that's enough leverage to start changing the thing you want to change. & #x200B; And some petitions do come with specific actions if a threshold is met. Like collecting signatures to appear on an election bal... |
Why do most animals have exactly 2 nostrils, when it seems like 1 would do? | It's possible that one surface nostril opening would be easily blocked or damaged. Two is less likely to do so", 'there are probably many reasons. a few may be 1. if one gets damaged, you have a backup2. to help identify which direction a smell is coming from |
the point in keyboard sticky keys | [Input holding down shift + a with no sticky keys] [Input holding down shift + a with sticky keys] This allows you to exploit certain things in some games that require pressing two keys rapidly, as long as you're able to rebind the keys to a modifier key + non modifier key. /u/MarchosiasBlack's response is *why* it exi... |
Why (according to my teacher) is the equator not perpendicular to Earth’s axis? | If your teacher actually said that and you didn't misinterpret what they said, your teacher is 100% wrong and has no business being in a classroom. The equator is ***literally by definition,*** perpendicular to the rotational axis. Perhaps you misunderstood and what your teacher said was that Earth's *axis* is not not ... |
How come blood transfusions can work even though the foreign blood cells contain the wrong DNA? | Note that red blood cells don't have DNA, although white blood cells do. What you're getting at is called a transplant reaction or Transfusion Reaction. This is not directly responsible to DNA which is usually deeply buried and protected inside the nuclear membrane in the center of cells. Rather, a transfusion reaction... |
Why are patients given general anesthesia directed to count backwards by 7s? Why not just talk? | Because people react differently to the drugs, they should be out fully before they reach 1 depending on how out of it they are at each number helps determine how effective it is should they need to give extra they won't overdose you. Obviously it's not the only reason but it's the main one", 'I have had it both ways, ... |
why do people have to brush their teeth to maintain them but animals don't and still have a really good teeth health | Most animals eat no refined sugar and die when they're 10. The reason you have to take care of your teeth is you're trying to outlive 3-4 generations of animals, on a diet that's harder on teeth.We live 70-100 years The animals that live longer never had teeth The animals that do have teeth and lose them, die Animals h... |
We get Internet from ISP. From where does ISP get Internet and how? | Think of the internet as a river system. You have streams that lead to rivers, that lead to bigger rivers, that lead to continent-spanning rivers, that eventually lead to oceans that connect the world. The stream is your local ISP. A boat can get to each stream if it knows where it's going. To make it uniform, every st... |
Why events occur “at” a certain time, “on” a day, or “in” a month or year? | in the room". So it makes sense to use "in" for time that has a duration, as in "in March" or "in 2019" . This reasoning doesn't explain "on Tuesday", however. Depending on whether we view a day as a point in time or a duration of 24 hours, we could say "at Tuesday" or "in Tuesday", but for some other reason, we don'tI... |
How can Minecraft generate a world that can be reproduced down to every exact block based on an 8-16 digit seed number? | The world's generated based on sending that 8-16 digit seed number through a mathematical equation. As a result, with the same seed the outcome will always be the same. An 8-digit seed gives you 16,777,216 different combinations. A 16 digit seed gives you 18,446,744,000,000,000,000 different combinations. As a result, ... |
Why do people (or even do they) but those infomercial collectible coins? like the Morgan silver coins? Are they worth their value or something else I am missing? | Keep em for the memories of your Grandpa. He found value in them, so use that as a reason to keep them. That's what I'd do .Yeah, those infomercial coins are garbage. If you really want some collectible found go on eBay and look for AU or BU or Proof coins. Those are the ones everyone wants. Buy them and hold them for ... |
why can't we feel the earths speed? | The earth isn't accelerating so you aren't feeling any change in velocity. When you're in a car going a constant speed you only know you're moving because you can see your position relative to objects outside the car. If there were objects whizzing past the earth at the same speed as the earth was moving, you'd notice ... |
how does not voting or voting for a small party affect the outcome of an election? | Vote for the small party that you can support. In a way, not voting can be helpful for the ruling party. For a small example, 20 voters. A got 6. B got 5. C got 4. So 5 didn't vote since they feel that the ruling party will win even if they cast their vote. But if they did vote against, then the result would be differe... |
Why does the school bus driver get seatbelts but the students do not? | the problem of seatbelts on a school bus is that you have one driver, who for the most part isn't acting in a supervisory role, and a couple dozen unruly children. While it might be safer to have all the children properly belted in, it's not entirely reasonable to expect that the bus driver is going to 1: get everyone ... |
why does getting stabbed by a pencil leave a permanent mark? | I got stabbed between a couple of my knuckles with a pencil something like thirty years ago; it stayed around for a long time but I just checked on it due to this question and all that's there now is the minor skin discoloration of an old scar. Guess my body finally dealt with it somewhere in the past decade when I was... |
How do animals who aren't parented know when they meet their own species? | My wife hand-reared a pigeon. This boy was rather confused as to who or what he was for a time. He would try to woo or fight the wild doves, somehow knowing which were male and which were potential mates. He would even confuse some inanimate objects as either male competition or he'd even try mate with them. But then o... |
Why is it that symptoms of anxiety differ so much from person to person? | Everyone has a fairly special mind that is there's and no one else's. So how it acts and how it observes the world are differnt for everyone. |
How does Coke Zero and other similar products contain no sugar, calories or caffeine and still have a taste? | The compounds giving taste is not usable by the body for energy. That said, many things have taste but does not have energy. Water has a taste, in fact, water has many different tastes depending on where in the world you are since the minerals in the water differs wildly. And water from swimming pools also have a very ... |
What is bad about GMOs? Why is it such a contentious issue? | They're not. Everything is GMO, we are GMOs ffs. Gene engineering is what makes everything we eat exist. |
Why does the north star always point north? | Keep in mind that the stars aren't moving we are. The Earth is constantly rotating around an axis that runs from the north pole to the south pole. Ok so now picture a globe with a laser pointing out of the north pole. If you put the globe on a table, and spun it, the laser wouldn't move, right? It would stay pointed at... |
With all the problems content creators are experiencing with Youtube and the public dislike for the platform, why is no one attempting to create or even discuss creating an alternative? | Google has made it extremely easy to access, view, interact with videos. A new platform would be just trash, wouldn't right away generate profit. +YouTube is popular |
Do Sprinkler Systems Put Out Fires? | Also check out askscience instead of here to see how multiple fire sprinklers work, sometimes it's not water. Factories will use a foam, or some kind of solution depending on what's going on in the building |
do different types of alcohol create different effects on actions/emotions? | Awel in europe I have heard about the anis-craziness. If you go overboard on Pernod or alike, your personality differs. A lot. Anis has some components similar to absynthe/green dragon which only recently came to market in 'allowed' dosage. All info and literature :google it. I'm in my bath.The different effects are an... |
Why is sugar bad for you and should you cut it out? | Sugar is digested into glucose, which provides us with energy. During the time of our ancestors, it was important to keep energy up because of their active lifestyle. Our craving for sugar is deep rooted in our need to make sure we had enough energy to gather, hunt, produce, etc. The problem is that our modern sedentar... |
Do other life forms (animals, plants) percieve the passing of time the same way as we do? | Apparently it depends on whether you're English or German :P _URL_0_ Jakob von Uexkull described the world of the tick's consciousness: 'whose essential activity consists in perceiving and acting'. The tick can hang around for 18 years waiting for the opportune moment to hop onto an animal and suck its blood, drop to e... |
How come the “eating eggs is bad for cholesterol” debate is still a thing? Can’t research and technological advances tell us by now if it is good or bad? | It is still a debate—the same goes for other food health debates—because a lot people still believe the old science. The new science shows that eggs are probably not as bad as we once thought they were, but a lot of people still think they are bad because that's what they learned 25 years ago. It is similar to how some... |
If black absorbs all colors on the visible spectrum, then how are there glossy black finishes that reflect light | I think it has more to do with how the surface interacts with light at. More microscopic level. When you have a glossy finish, the light hits and is generally reflected straight outwards, when you have a stain finish, the surface in more 'bumpy' which makes the light more prone to reflecting into another interaction wi... |
What are the procedures and different types of headlights to not make them seem like high beams? | Federal standards set basic height and aim requirements for headlights. The reason why some retrofit setups are blinding is due to where the actual light output is in respect to the surrounding reflector setup. Some of the cheaper designs don't position the source in the same spot, resulting in the pattern of the light... |
How is nuclear energy cleaner than other methods of renewable energy like wind energy and solar energy? | Energy density and resource consumption. Nuclear energy requires bugger-all fuel, and as a result, produces bugger-all waste. The only by-product of the generation stage of nuclear energy is steam. As for the waste, they can just chuck it in the appropriate containers and keep it contained within a relatively small foo... |
What exactly is MSG and why does it have a bad repuatation in foods. | like aspartame, it can be harmful if ingested in inhuman quantities. otherwise it's perfectly fine to use in foods. i think it's even the main component in tomatoes that makes them bring out flavor in foods.I’m torn on this. Hawaii was super big on it and we ate it in a ton of stuff with no reaction. I dunno. |
Why do plugged in electronics drain power when not on? | they use electronic switches which use solid state components. unlike the mechanical switches you're used to, they still allow a piffling current to pass, as the circuit is *technically* still closed. |
Why is blue cheese safe to eat with mould on but other cheeses aren't? | Same as mushrooms really. You don't go eating wild mushrooms without identifying them first. They know the mold is tasty and safe. Also.. it's suppose to be blue. If it turns green it won't right. |
why do you weigh less in the morning than at night? | Every time you exhale, you're expiring gases composed of carbon dioxide, water, and many other compounds. The gases in the exhaled breath contain a tiny bit of mass and the more you breathe, the more mass you lose. So while you're sleeping you're losing mass by breathing, but not consuming any food or water, so the res... |
Why can't a phone connect to multiple speakers via bluetooth? | My Pixel 2 XL can connect to up to 5, though you have to enable the option manually and though it will connect to multiple simultaneously, I don't think it will play audio simultaneously. |
Do they keep foods heated instead of refrigerated in colder climates? | Despite the changes in room temperature, as in warmer closer to the equator and colder towards the poles, bacteria behaviour doesn't adjust. The fridge keeps the food at around 3 degrees Celsius, the temperature that bacteria grow least and the temperature that food doesn't freeze. |
the change in income tax law between 2017 and 2018. | Most tax law changes reduce the tax rates along with reducing ways people have to reduce their taxable income or tax due. It's possible you previously benefitted from one or more deductions or credits that is no longer allowed. The big changes were: * Lower rates on all brackets* elimination of the personal exemption* ... |
When mouthwash says it kills 99% of germs, is that not just breeding super-bacteria in your mouth? | Not really. Imagine the nuclear bombs dropped on Hiroshima and Nagasaki. They didn't kill every single person, and neither would the Tsar Bomba. However, the children of these people won't have a resistance to nuclear bombs. Same thing applies to mouthwash. By some chance, there's going to be a few bacteria that surviv... |
What is the physiological difference between (cannabis induced)munchies and "real" hunger? | I would be very interested to see the result of this question being put to the r/drugs and r/trees userbases, but - single data point here - I have never once been made hungry by cannabis. I've eaten a veritable ton of snacks under the influence because I wanted to taste a thousand things with those enhanced senses, bu... |
How do motor boat engines not get water logged? | The actual motor is well above the waterline, usually at least 1-2 feet. Like on this outboard boat for example _URL_0_ The actual motor part is in that black plastic housing, there's possibly a gear box and shaft that goes down to the actual propeller. In theory water could get into the housing for the shaft, proper m... |
How can phones have 8gb ram in such a small formfactor and pc needs these huge 4gb ram stick? | Computer RAM increases bandwidth by accessing multiple chips simultaneously. One stick of RAM holds either 8 chips , or 16 chips A byte of RAM is read/written across 8 chips - one bit per chip - rather than accessing all 8 bits from one chip. To make bandwidth even faster, computers often run RAM in dual channel mode, ... |
What is HTTPS and what data can our IPS theoretically see and realistically see? | As others have already stated HTTPS is just HTTP which is used to interact with servers world wide to retrieve information and webpages but instead all the data which is sent and received is either being encrypted or decrypted from your local modem/router. ISP's will have access to information related to when you are s... |
What exactly are ocular migraines? | The first time I got one I was in school looking at white paper. I thought I got snow blindness from looking at the paper for so long lol. I still get them a few times a year but now it's just annoying and I've learned to deal with it. The headache afterward is definitely the best part though. |
How can the color spectrum be wrapped into a continuous color wheel? How can the highest frequency colors blend into the lowest frequency colors without clashing? | The answer is disappointing: We don't actually see the colours that things are, we see what our receptors notice. Receptors are quite limited and so each only sees a colour range around roughly 3 colours , though supposedly some people have partial reception of a fourth and some only two, the latter is a form of colour... |
Before digital cameras, did pictures have a resolution? If not, how was image quality measured? | They kinda had resolution, but it wasn't a fixed grid like a digital camera. The film had grains which were in an irregular pattern. 35mm is considered to be around 20 mp. If you are seeing blurriness in old photos, it is more likely caused by movement / poor lens, than lack of 'resolution'.The reason most old photos a... |
Why cell phone companies don’t implement some kind of public key authentication to track robocalls? | There is such a system being rolled out; it's called [SHAKEN/STIR] The problem is that the rollout has to be coordinated between every carrier on the phone network. Each carrier must first implement the system to identify calls they originate, transmit that information to the other carriers they send traffic to, and re... |
When a battery is fully charged, where does the extra energy go? | You can use your water analogy, just a different understanding. Voltage is electrical pressure, similarly you can have water pressure. Current is the amount of electricity flowing, similarly the amount of water flowing. If you have a charger on the battery and the voltage of the charger is higher than the battery becau... |
Why doesn’t wind chill effect the thermometer? | Something feels cold because the heat energy in your body is being transferred to whatever you are touching . The faster the heat transfers, the colder it feels. And the more cold stuff you are touching, the faster it will transfer. When the wind blows, you are touching more air, so the heat is leaving your body faster... |
why do american fuel pumps have one nozzle for multiple fuel selections? surely they'd all mix | Pipelines do this too. They used to seperate products in pipelines with plugs called pigs, but they realized it didn't matter and stopped.Actually, what you get IS a mixture of fuels, by design. In the pump, they combine a couple different grades of fuel in varying amounts to produce the multiple grades they sell. Ther... |
What makes my head hurt during a headache? | I had migraines a few years ago and no medications were working. I finally had a spinal tap and adding fluid hurt more, yet putting fluid in made it go away. I wonder why meds didn't work for me. |
Why toddlers are so great in learning languages ? | They don't fear making mistakes or misunderstanding. If you notice, they are really not that great at production for a long time either.. |
Why does a scientific calculator show "0" as a result if I add 1 to a really high number and then substract said high number although it should show "1"? | The floating point and rounding situation other people mention is true, but I think there is also an order of operation that is important here. Let's say your input is a + b - c, the calculator processes a + b first then it subtracts c . What happens if you input 2^50 - 2^50 + 1? |
How do spacecrafts not melt off through launch if the temperature in the exosphere is 1700 degrees celsius? | if you put your hand in water thats even 105degrees, you'll be extremely uncomfortable and any higher will risk burns. & #x200B; Yet, you can hang out in a sauna at temperatures upwards of 190degrees Farenheit, even though it contains a small amount of dissolved water , the lower density of water in this situation demo... |
How did corporate raiders boost share prices? | you look for a company that has low profits, but at the same time very good assets, like valuable patents, lots of company property, profitable subsidiaries or low amounts of debt. then you borrow money and buy a large share of this company. you can also convince other shareholders that your management decisions would ... |
Could I see the stars from the suns surface? Why or why not? | generally no. the idea of the sun having a surface is a bit ambiguous, since its a giant ball of plasma and gas, but most intuitive conceptions of a surface start at the *photosphere*, as this is the layer at which the sun becomes opaque. above the photosphere is thousands of kilometers of much less dense material that... |
Why are banknotes used for large denominations of money, and coins for smaller amounts? | The reason why is prevention of counterfeiting.On a banknote, you can have holostamps, transparency layers, uv layers and whatnot. On a coin, you can only have it's shape and composition. If we had $100 coins, counterfeiters could mint a lot of perfect fake money. The reason why it's not done with the coins we have now... |
How do inch fractions work? | You've managed to find a very unusual Imperial ruler. The norm is for an inch to be divided into some power of 2 equal measures - generally 8, 16, or 32. It would be weird for an Imperial ruler to be divided into 20 equal measures per inch precisely because no one uses 0.05 of an inch as a measure. |
Why do companies like Coke, McDonalds, and Walmart still spend money on big ads? People will buy there stuff anyways because they're so big so why? | I've tho8ght this for years. I think it's just because that's the way it's always been. I really believe companies like coke and McDonald's would have a bigger bottom line if they didn't spend billions on advertising. People seeing an ad and running to McDonalds might net them say a million dollars a year. But they're ... |
why do car radios and infotainment systems turn off for a few seconds when starting the engine? | The car disconnects most of the in-car systems while the engine is starting, because the starter motor in a car is the single most power-hungry component, so it needs everything the battery can give it for that second or two while the engine is cranking. While you've got the key in that third position, while the engine... |
What is a pyramid/ponzi scheme? | Startling good rates of return, complicated business structure and secretive accounts are indicators of a Ponzi scheme. If it looks too good to be true it probably is and should be avoided. A Ponzi scheme uses the investor money to pay dividends back to the investors and hypes the amount of money being made by the comp... |
Why is there a credit option when paying with debit card? | I get a cash back reward using my debit card as a credit transaction. I don't receive the reward when I use my pin. |
Is there a practical reason for a car's driver to be on the side rather than the middle? | Overtaking someone is a pain if you are not seated at the same side as eveyone else. People driving a car that is build for right lane traffic in a left lane country or vice versa know that problem. You can't very well edge out to check omcomming traffic. Cars with seats in the middle suffer from the same problem. To a... |
Why 10? What is the appeal of 10 base numbers that makes everything easier? Why couldn’t it be 8 numbers? | It is completely arbitrary, except we have ten fingers, so it made a natural sense to index at ten. The Egyptians counted the knuckles on their fingers with their thumbs, and therefore indexed at 12. That's why our clocks are split into two counts of twelve.It would, and many cultures in history used other bases. The m... |
why do gears multiply forces ? | Its because of two things. first, you can apply force with zero energy. This isn't intuitive. Humans mostly use energy to apply forces. If you push on a wall or hold yourself up on a chin up bar, you will start to fatigue. Your muscles usually expend energy to apply a force. But this is a limitation of human anatomy. I... |
Why does hearing certain noises (such as nails on a chalk board or, for me at least, cardboard scraping against itself) cause bodily discomfort? | I did my final for a psychology class about this topic. Surprisingly, there's not a lot of results as to what triggers something in our brain to have a negative reaction. One of the studies I looked at hinted that the frequency range was a screech of a macaque monkey, this hints at some of our ancestors and what kind o... |
The CEO of the company I work for just sold $1.2 million of his company stock. What does that usually mean? | Usually it means nothing. Senior executives often get much of their compensation in the form of stock options and stock grants, so he may simply beexercising options and/or converting the shares into cash for living expenses or to diversity their investment portfolio. Maybe he has a regular sale of shares set up , or m... |
Why are people still using Handwritten Signatures to sign checks and contracts when it takes literally less than an hour to forge it? | Think of a check as a contract. You promise to pay the recipient the amount listed on the check. They can then take that check to a bank, who has already made arrangements with you and your bank to pull the money out of your accounts, as indicated on the check. Like a contract, forging someone else's signature is fraud... |
Why are eSports so much more popular in South Korea than other places? | An answer, is that they've had an NGO called the Korean E-Sports Association since the year 2000, whose main purpose is to make it into an official sport and to 'commercialize E-Sports in all sectors.' It's backed by several corporations and the Korean Ministry of Culture, Sports, and Tourism. Another answer is that th... |
Why does a slightly hot shower feel like you are burning when it touches your skin, while a hot tub set at 102F feels comfortable when you get into it? | It is likely your 'slightly hot' shower is hotter than 102 F. Hot water heaters are recommended to be at least 120 F and be often up to 140 F. Typically tubs in your house, if newer construction, are required to have thermostatic mixing valves which have a maximum setting of ~115 F. Most shower valves have a adjustment... |
How can some states have zero income and/or sales tax? | Generally if they have no sales tax, they get the revenue from elsewhere. For example, Delaware has no sales tax, but there are a large number of tolled roads. So while the roads aren't supported from Sales tax, they are supported by the tolls to utilize them. Additionally there is still the issue of property taxes, ve... |
Why does connecting an electrical circuit without an appliance on it cause fires/explosions? | Since a free wire connection means virtually no resistance and all connections in the house are in parallel, all the current that your house receives would flow through that wire which would cause it to overheat and melt, and would burn out it's cover and the house down with it |
Why does exercise cause us to not be so depressed? | Your body has something called cyktokynes they're a bloodmarker/measure of inflammation in your blood, when you exercise your muscles use up these cytokynes in your muscles in order to repair micro trauma from exercise, this lowers the available cytokynes in your stomach that cause excessive anxiety, leading to overall... |
Why do electric ovens preheat so slowly, and yet electric kettles heat so quickly? | It's much harder to conduct heat into air than into water. The thermal conductivity of water is about 25 times as large as air. The heat capacity of water, on the other hand, is only about 4 times as large as air. That means if your heating element is at the same temperature, it will take about 6 times as long to heat ... |
How do life insurance companies stay in business? | Some life insurance simply has an expiration date when you cease to be covered. Renewable term has premiums that go up over time, and in late middle age the renewal premiums can skyrocket. Most life policies don't provide coverage after a certain age, often 65, 70, or 80. The vast majority of people who pay for life in... |
In what way is a salary better than a wage? | It's usually easier to plan. With a salary you know your minimum annual income ahead of time. So planning and budgeting for expenses, saving and treats is easier and more accurate. It gives a sense of security", 'If you have steady work hourly is better. I work 50 hours a week and get the same pay as if I worked 40. |
Why not use a 600lb goalie in hockey? | Goalies need to be able to get back on their feet quick. Sure larger goalies may take up space, but if they go down they probably aren't so quick at getting up. |
How does my phone track my steps? | A mechanical pedometer is easier to visualize. There is a weight on a spring. Every time you take a step it bounces and counts one step. The phone just does that electronically without any moving parts. I'm just annoyed that it mistakes my fairly vigorous ice skating for a very slow walk. Just not as much impact! |
- Salt is supposed to be dehydrating, but electrolytes are salt too, and good for hydration? How does this work? | Wherever salt goes, water follows. If you're taking salt in, there is a retention of water in your system. If your body detects you have too much salt, the body will excrete it and the water will also follow.Salt is an essential electrolyte, but if you overdo it, your body needs to flush it out, leaving you dehydrated. |
what’s a Credit score and do I need to care about it if I never plan on getting a loan or a credit card? | If you're planning on renting an apartment, buying or loaning a car, buying a house, opening a bank account, or starting a business, you should care about credit. Some jobs might care about your credit. Some spouses might too. It's a score that keeps track of if you repay your debts. If someone needs trust whether you ... |
What stops an amputee’s bones from trying to regrow through the skin at the site of amputation? | Google epiphyseal plate. This is a thin band of cartilage where long bones grow longer. When you become an adult this cartilage turns into bone and you stop growing. So, as an adult your bones don't get longer. They sometimes get wider or thicker though. & #x200B; Humans have osteoblast cells and osteoclast cells. Thes... |
I'm a left hander but I don't operate as one half of the time, what gives? | I've thought of myself as a self-imposed ambidextrous left-hander, but maybe my handedness is better explained as cross-dominance. As a tree climbing, rough and tumble tomboy, I taught myself to use my right-hand certain that I'd break the left any day . I can do almost anything with either hand, but not equally well. ... |
The difference between Type 1 and 2 diabetes | In type 1 diabetes, the person is not producing insulin, or the insulin they do produce is defective. By injecting insulin, and carefully monitoring blood sugar, they can adapt to this. In type 2, the insulin is fine, but it isn't doing the job, normally because there is a big layer of fat absorbing and getting in the ... |
In severe diabetes cases how does removing a persons foot help manage their blood sugar, what does removing the foot do? and what causes that? | Amputation has nothing to do with managing the disease, it's that even minor abrasions and cuts heal extremely slowly and very often cause gangrene, especially on the peripheral such as feet", 'I think when a diabetic loses a foot it’s because of gangrene caused by the diabetes. Someone smarter than me can explain how ... |
Neutral Switzerland - how did they do it ? | Everyone praises Switzerland for their stance on neutrality but theres a flip side of that coin. These are the guys who would watch their neighbors countries burn and genocides happen without lifting a finger. Imagine you're being invaded by a nazi led army and the swiss are your other neighbor. No need to ask for help... |
When scientists write "sunlight/certain chemical cause(s) DNA damage", what does it really mean? | Usually it means either that one or both strands of DNA can be broken, or that a DNA base can be changed into a different one. In the latter case, that's a mutation introduced directly. In the case of breakage, cells have ways to repair DNA, but sometimes it is repaired incorrectly, introducing a mutation as well. Most... |
While downhill, do cars consume more fuel while in neutral or while in gear with low revs? | When a manual car is in neutral it will always consume some fuel to keep the motor running no matter the angle of the ground it's traveling on. While it is in gear however the downhill can help keep the engine alive allowing the car to keep running while not consuming any fuel. |
how does the population of China keep growing when they have a one-child policy? If two people replace themselves with just one person, shouldn’t the population be shrinking? | For starters, the one-child policy didn't mean you weren't legally allowed to have more than one child, it just imposed heavy financial penalties to discourage families from doing that. For instance, having a second child and subsequent children will incur a fine and reduction of tax benefits. In the extreme, it may ev... |
Why does the world's economy only grow at 3% (aprox)? | To get the world GDP growth rate, we do not average the GDP growth rate of each country weighted by how many seats they have in the UN general assembly. So the numerousness of the developing countries do not matter. Nor do we weight them by how many people each country has, so the populousness of them also doesn't matt... |
Why does touching both ends of a (D,AA,9V) battery not complete a circuit? | AA batteries have a small voltage while our skin has an incredibly high resistance. As such, the current that passes through the circuit is miniscual. A 9V battery has a larger voltage, but similarly, our skin is good at resisting it. However, if you lick it , the liquids on your tongue have a small resistance, and so ... |
Why haven't electric cars (particularly the Teslas with the full glass roof) implemented solar panels/charging on the roof? | > I know the solar probably won't generate enough power for a full charge, but seems like you'd be able to get enough on a sunny day to keep your charge level up while out and about. Nope, the math doesn't work out. Cars require more power than the sun shining on them can provide. The Tesla Model S uses about 19,000 wa... |
Why does making a 3 degree difference in your homes thermostat feel like a huge change in temperature, but outdoors it feels like nothing? | I'm going to make this a bit simpler than the rest of the answers and say that it's mostly just because you're used to it. In our house the temperature changes between 16C/60F to 21C/70F depending on the time of the day, when the fireplace was last used, how cold it is outside and so on. I'm used to it and don't really... |
How do film crews get in contact with big cartels and criminals and how are they allowed to not tell the police about gang’s location? Also how can they trust these criminals? | Police generally know who and where the bad guys are. It's not like it was a big secret that Al Capone was in charge of the Chicago mob and where he lived. But knowing something and having enough proof to convince a jury are two very different things. |
Why does the square root of i = (1/square root of 2)(1+i)? | It was discovered that the following formula holds: e^ = cosƟ + isinƟ When Ɵ = π, this simplifies to: e^ = -1 If we then square root both sides, we get: e^ = i Then again: e^ = **√**i So now we have **√**i equal to *something* that we can manipulate, specifically using the formula back at the top, where Ɵ = π/4: **√**i... |
Does a high pitch sound really shatter glass? What is the explanation for this (if true)? | It isn't that it is high pitched, it is because it resonates with the object. Imagine a pool of water which you make a wave in at one side. The wave will move across the pool and bounce back from the other side. When it gets back to where it started it will be diminished, but imagine you make another wave in the same w... |
Why is it that a person with cold hands hands feel colder than the ambient temperature of the room. Or even colder than an inanimate object in the room. | Imaging sitting in a sauna. It's 100 degrees Celsius . It's hot but you manage to sit in there for 15min. Now imagine just putting your hand in some boiling water . Same temperature but you will scold yourself instantly. This is going from air temperature to liquid temperature. A hand would much more of a difference si... |
How come my dad (who is allergic to pollen) isnt allergic to honey? | Pollen and nectar aren't the same thing. Bees collect nectar and turn it into honey. Plants offer the nectar, which is expensive to make, because they know that when insects like bees collect it, they will accidentally get some pollen stuck to their body and transfer it to another flower when collecting that flower's n... |
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