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why does flint michigan not have clean water yet. | The city of Flint, Michigan was founded in 1819. Since then they've been laying down water pipes everywhere. For a long time water pipes were made of lead/iron pipes. The lead is fixed so for the most part it's not a big deal. When they switched the water to the river water the river water wasn't treated properly so it... |
Why baby boomers are generally against the use of Cannabis? | Because they've been bombarded with propaganda since they were kids. There are different groups who would have an interest in keeping marijuana illegal, drug companies selling opiods and opiates, anti-depressants ETC. They have been fed so many lies over and over again and that makes their view of cannabis very ingrain... |
When jumping a car battery, why do you attach one clamp to the dead car, not the dead battery? | Just for safety. Batteries outgas hydrogen. A spark can ignite it. By connecting the ground to the frame/engine, the potential spark of connecting is less likely to ignite the gas. Also, sometimes battery explode when connecting a high current source to them , so getting away from the battery during connection makes it... |
Why is there always two locomotives on a train, one facing forward and one backward? | Some train companies do this so it makes it easy to turn the train around at the end of the line and go the other way. But some don't do this at all.The ones I see look like they’re just picked up the way they were left off. The cool part is watching one guy hop out and operate the train from the ground by remote, to m... |
What is “Ray Tracing” and how does it work? | Ray tracing is when you create 3D images by actually calculating the path of each ray of light & then simulating how they bounce and change color when hitting objects. It can produce absolutely lifelike pictures if your material models are good but, until now, it's been to computationally expensive to do in real time. ... |
If you feed a cow with its own milk, will that cow be able to live out its life with no additional food source? | No system is 100% efficient. When the cow feeds it doesn't just use energy it has gotten from the food to make milk, it also releases some of that energy in the form of heat and motion . |
Calorie instake vs food weight (Cal density) | I mean if I ate 3 chocolate bars, I'm going to be hungry again in 3.6 minutes.If I ate that much potato, I'm going into hibernation for the winter", 'I mean, if you have a page printed normally with say 1500 words or have 1500 pages with one word each, you get the same information, don't you? Your body doesn't "gain" p... |
Why haven't we invented a better way to clean teeth than brushing/flossing? | Brushing and flossing honestly don't take up a lot of time. If you're brushing correctly, it should take about two minutes. Flossing takes only 1-2 minutes. Brushing twice a day & flossing once per day will only take a grand total of 5-6 minutes out of your day. Don't be lazy. |
Why does the brake pedal seem to stiffen up if the car is off, but then go back to normal the second the car is turned on? | Power brakes are assisted with vacuum pressure either generated by the intake manifold or a pump . You usually get 2 to 3 presses of the brake pedal before all the pressure is released. If the engine is running, the pressure gets restored, otherwise it doesn't and the pedal gets still. |
why there is a statute of limitations on most crimes? | Because the more time that elapses after the crime, the more likely it is that evidence will be unreliable or unverifiable. People's memories are bad enough as it is and this only gets worse with time.For many crimes, obtaining and presenting evidence and testimony for a crime becomes less reliable over time. This ofte... |
If we can use pipelines to transport oil across the country why can't we do the same for water? | According to the USGS, the State of California uses approximately 28,000,000,000 gallons of water per day. That's 28 billion gallons. Let's assume half of that water gets supplied by your hypothetical water pipeline. 14 billion gallons in 24 hours is a rate of 9,722,222 gallons per minute In designing pipe infrastructu... |
Why is Latin a dead language? | Because it is no longer spoken by any natives. I believe that we also aren't exactly sure if we are pronouncing it correctly. ", 'All languages change and evolve over time. Eventually people speak differently enough that no one can understand it the way it used to be spoken. Really, Latin is no more different from Ital... |
What is a security clearance? | A security clearance means the government has investigated you to verify that you are not susceptible to being leveraged by bad actors to obtain information that could be used against the nation. The process can take 1-2 years, or longer, with several persons worth of man hours involved. Rather than immediately termina... |
how is induction cooking different than a typical electric stove top? Don’t they both just send an electric current to create heat? | Regular electric stoves send a lot of current though thick wires, causing the wires themselves to heat up. The stove heats up, and then heats up the bottom of your pan. With induction the stove itself doesn't heat up. It **induces** a current in the bottom of your pan, causing the pan to heat up directly, instead of in... |
Why do some small cuts really hurt while other cuts that are sometimes larger or even bleeding go unnoticed? | I think the lack of blood flow in a wound makes it hurt worse. The salt from your sweat is causing the nerves to 'burn'. Blood is the right PH and it washes away the irritants, so it soothes the nerves. |
How many appliances can I plug into a single socket (using series of extension chords) without 'something going wrong'? | I'm assuming you are in North America, where we use 120v power. The key is to look at the wattage of each device you want to plug in. Your circuit breaker is either 15 amps or 20 amps, probably 20. Check the panel to make sure. Next find out how many outlets are hooked to that circuit breaker, turn it off and then find... |
How does cancer end up killing a person? | By invading organs necessary for life and disrupting their functions to the point where they shut down. Cancer cells are rogue cells that multiply out of control and use up nutrients that the rest of your body needs. If you have lung cancer, or some cancer that spreads to your lungs, the cells there will continue to di... |
How do those Dyson blade less fans work! | There's an actual rotating fan mechanism hidden in the base. It drives air up a tube, and out the front of the mysterious-looking circular vent. |
Why do chicks hatch? Are they all curious or angry or otherwise instinctively inclined? | Just like people developing as babies know when they're ready to come out after a certain length of time, chicken chicks know that after 21 days forming in a shell, the conditions are right to emerge. They've been using nutrients in the yolk, and will absorb the last bit of yolk, then turn to the air sac in the egg for... |
Why do the 8 B vitamins have numbers that are different? Eg B9 and B12 | I do not know the answer to your question, anyways, for some reason i confused the sub of this post with the one above it, didn't look too close and so I thought this was r/jokes. I was trying really hard to figure what the joke was."Note:\xa0other substances once thought to be vitamins were given numbers in the B-vita... |
How do you build an underwater tunnel? (Like the Oresund bridge) | They can put concrete underwater, I don't know if it's a different kind or if they have a special way of doing it but on oil and gas platforms the well has a concrete cap at the bottom, above the deposit. |
Why is a full eye transplant still not possible? | Think of it this way; researchers have only recently found ways to re-grow the nerve connections in a severed spinal cord. This is for nerves that are relatively large and have some room for scar tissue buildup. Now shrink the thickness of the nerves and pack them all into a small cord with not much else in it. Any sca... |
Why is the Euro considered to have a bad effect on the economies of some European countries (like Greece and Italy)? | One of the most powerful economic tools a country usually has in order to tackle financial challenges is the absolute control of the amount of money being printed . Since the euro isn't printed in Greece or Italy, their toolbox for reacting to bad times is very weak. The core problem is that the European Central Bank, ... |
Why is it easier to swim in a cold pool than it is to take a cold shower? | Water absorbs a lot of heat from your body when it evaporates. When your body is submerged it can't do this so you lose less body heat. Source: Something I heard a long time ago that may or may not be true |
How much time does it take for disposable plastic water bottles to become dangerous to refill/reuse? | I use mine for a long ass time, typically until they shatter. Sometimes they start to smell like 'pond,' then I just put in a few drops of bleach and fill it with water. Let it sit over night, empty and reuse. I buy a lot of products just to reuse their containers. Like those Simply Orange juice jugs. Those are my favo... |
Why can cleaning products never get that .01% of bacteria? | Nothing can ever be truly perfect. Also, they don't want to advertise 100% in case someone tries to take them to court over false claims. I don't think they can, either, due to laws about advertising truthfully and whatnot. Lastly, there are bacteria in the air, so as soon as you're done cleaning something, it is immed... |
Why is it such a big deal to lose security clearance? | If you wanted a job that required having a clearance in the future, you wouldn't be able to get it. It's like losing your credibility in your field of work, and it's kinda a slap in the face.The big deal isn’t that some people lost security clearance but that it was improperly stripped from them for *political* reasons... |
If you walk out of the shower clean, how does your towel get dirty? | It's still gonna be wiping oils and dead skin off of your body. And also, when you hang up a wet towel, it's gonna get a little musky. But really a towel can be used like ten or fifteen times before it really needs a wash. |
Why can we only independently control our big toes, and not control each of the other littler toes without the other 3 moving with it? | As a kid I could pick up rocks and throw them with my feet. I still us my feet too pick stuff up offs the ground. Wife thinks it's weird.Big toe is moved by a different muscle from the other 4 toes. The 4 other toes are moved by the same musclegroup. |
How come there is no cure for a hangover yet? | There is a cure. A hangover isn't a mysterious affliction. It's caused by excess drinking. Your body gets dehydrated because of how your body reacts to alcohol and suffers from the effects. Just like you don't instantly heal from a bruise or a sprain the body is not going to miraculously heal from the damage you have w... |
What makes a substance, such as glue or gum, sticky? | I'm gonna start by acknowledging that I may be an idiot. But here's my understanding. Adhesives, and generally sticky stuff like glue are able to sink into microscopic crevices in materials. As your adhesive hardens and solidifies, it becomes sort of anchored to that surface due to these crevices. Some adhesives Anne b... |
How can forests grow indefinitely without depleting the soil | Different plants require different things from their environment and they have evolved over millions of years to create a balanced ecosystem allowing them to thrive. In farms, farmers take advantage of this by rotating crops. For example grass crops such as corn and wheat are unable to pull nitrogen from the air. They ... |
Why do phone touchscreens react to skin and water but not to metal and other conductors? | I feel like there's a lot of misinformation in this thread. It's very hard to pick out the right answer when there are like 10 different ones all saying different thing. |
What happens at those high way truck weigh centers? | The trucks are weighed to see if they are violating local laws that restrict the maximum weight the trucks can carry. The weight restrictions are for safety and also to prevent excess wear on the roadways. Overweight trucks can be very dangerous as they are much harder to control especially at highway speeds. They can ... |
How do those incredibly cheap knock-off brand dollar stores with next-to-zero sales in gigantic warehouses stay in business? | Merchandise is usually upsold a lot. A t-shirt at Kohls that you buy for $20 was probably made in bangladesh for about $.25. When you're buying their stuff what you're paying for is the brand, the packaging, the shipping, the store rent and other bills. The dollar stores you're talking about dont upsale a bunch. They g... |
Why does the CIA use the polygraph when recruiting if it isn’t even accurate? | * there is a cult-like belief within some law enforcement circles that polygraphs actually work* more cynically, some in law enforcement don't care whether they work, they like having a scientific-looking test they can interpret however they want to reach the conclusions the want* people had more faith in polygraphs in... |
How does investment work? | Investing is complex 1 - the bank The bank will let you keep your money with them. They will protect your money and make sure that up to 250,000 is insured incase the bank collapses, known as FDIC. If you store money with the bank, they will pay you to let them loan it. If you but 1000 in a bank, they may give you 2$ a... |
How can two ISPs in the same city start with the same prefix? | Check the netmasks to figure how big the IP range you're sitting in is. Not all ISPs have class-A IP ranges . An ISP doesn't even need to maintain everything in a contiguous block. [Here's a list that Comcast posted listing their IP ranges). Apparently you're looking at Xfinity addresses in 174.48.0.0/12. Centurylink d... |
How have we only discovered 5-10% of the ocean and what is holding us back from discovering more? | We have very detailed maps of the entire bottom of the ocean, so in that sense it's all been discovered. However, it's costly to send vehicles down there , so we just look at sample places that seem worth going to. |
How does the alarm for a passenger not wearing their seatbelt in a car NOT go off when you have a large amount of weight sitting in the passenger seat? | There's a switch in the seat that gets turned on when something heavy enough is sitting there. I don't know the exact weight that triggers it, but I suspect it's in the 40-50lbs range as I had this happen just a week ago bringing home a 40lbs bag of dog food. |
Why does the answer in a series of operations change when you don't follow the PEMDAS rule? | PEMDAS is a convention. when representing reality using mathematical variables & constants this order of operations must be taken into account for consistency. it is just like turning what you're seeing into a sentence with a language with only a set number of action words , and strict grammar. if you change the senten... |
Why do airplanes needs a high and low pressure air system for lift instead of just using an inclined plane? | > If you take any piece of hard material and angle it in wind, it will generate lift It will. The problem is, it also generates a lot of drag. The more drag is created, the more thrust needs to be supplied to overcome the drag, so aircraft design is concerned with producing the desired amount of lift with as little dra... |
Why do cars make that weird "womp womp womp" noise when only one window is rolled down? | Same reason a bottle makes a time when you blow over its mouth. Helmholtz resonance occurs when air passing over the opening of a chamber causes the pressure in the chamber to oscillate. The size and shape of the chamber is key here. A bottle oscillates very quickly so we get a tone. A car is much slower, maybe only a ... |
why didnt hydrogen fuel cells take off? | If we look at electric, the way we can provide that is easy. Our basic grid is in place; we just extend it to charge cars. It's not very dangerous, easy to manage, and simple in concept. For Hydrogen, it's difficult to create large amounts of it and store it. And then we have to transport it. It's highly explosive, so ... |
When someone is sentenced to death, why does it take so long to carry out the sentence? Up to 25-30 years in some cases. | When you are sentenced to death you are automatically entitled to appeal. This process like any other legal process takes time.As the punishment is so severe the whole process can go all the way to the highest courts and even the President.This takes time. Assuming you exhaust that process there are only so many execut... |
female voices are higher pitch than male voices, so why can you still hear the difference between a male and female voice when they sing the exact same note for example? | Basically the frequency response of the resonant cavity - chest/throat/mouth is different between persons - and between male and female and short-sized and full sized adults. When humans makes sounds, you cant judge them from their whistling sound or their fricative sounds - the 'tsh' sounds etc. What gives them away i... |
How do we know when and how much money needs to be printed? | It's to do with how much spending power money has. The Federal Reserve keeps tabs on something called inflation--The more you have in circulation, the lower the spending power because it would be less valuable and rates increase. |
How is buying from the grocery store cheaper than buying premade? What about the overhead for both? | Someone needs to prepare to food either way, but in the case of the groceries that person is you. Presumably you aren't being paid for your time so the cost is lower, while for the pre-made whoever prepared it is being paid. |
If the breakdown of sugars in the body releases water, why does eating sugary food induce thirst? | /u/Inferno8 is absolutely correct, but also consider than when you eat foods with a ton of sugar you're giving your body way more sugar than it likely needs to burn. All of the excess is converted to triglycerides for storage and later use, so it's incorrect to assume that all that sugar is broken down to release water... |
What stops minors from buying lottery tickets from machines | The ticket would honestly be invalidated; most of the lotto machines are on camera feeds, and the ticket sales are timestamped. For the smaller prizes they won't care, but for the bigger prizes they'll check the camera feed to ensure that the person who bought the ticket is part of the party who is redeeming it. When t... |
- Why does a half moon look like a straight line down the center of the moon while a quarter moon shows the curve of the Earth? | Take a ball that has a seam in it, like a plastic one made from two halves, hold it with finger and thumb on the seam at opposite sides, and slowly spin the ball. When the seam is closer to the visible edge, it looks more curved. When the seam is right in the middle of the visible half, it looks straight. It's the same... |
What IS poor eyesight? What in your eye is making you see things blurry? | Basically, your eye is a round ball, with jurist a little hole to let the light in. Because it is perfectly round, the light goes, zing, straight in without changing its path when entering through the hole. For certain people, the eye is not very round . This is because the liquid inside the eye is pushing pushing push... |
Why is Tesla having higher networth than Ford or GM, when the former hardly produces a small percentage of cars than latter? | As u/robbak said, the share price is based on how people think the company will do. An extremely simplified example would be: Would you rather give my company $10 today and have $20 next year, or give me $10 today, get 0 next year, and get $1000 the following year? The idea is that when Tesla becomes profitable, it'll ... |
Body makes cancer cells everyday, why don’t we have cancer? | Cancer is not a specific type of cell, like a skin or blood cell. Instead, think of cancer as a mutation. All cancer is, is a rapidly dividing and multiplying cell that isnt supposed to multiply. When a certain cell mutates, that mutation can suddenly turn into cancer. When someone says that cancer is in everyone of ou... |
What is economic left and right? I don't understand. | It's about how much of a role the State should have in the economy. On the extreme left you have the idea that the State should run *everything* in what's called the Planned Economy. Essentially there is no private sector, all major companies are run by the government, and the government decides how much of what gets m... |
Why can't you suck water higher than 10m (33f)? | Nope. Once you have a vacuum above the water the pressure can't go any lower, and at 0 pressure , water rises about 30 feet.With a pump, you can increase the pressure at one end. So you can make the pressure however high you want to go up into a tower. With sucking, you are reducing the pressure at one end. This has th... |
If a lactose intolerant woman drank her own breast milk, would she have an allergic reaction? | The problem is that it's non-digestable therefore no problem when it's stored in the breasts, but presumably she would get gassy and have an upset stomach if she drank it just like with any other dairy. |
the discrepancy between the mass per volume of water and its component elements. | Mass is conserved not volume. When you make 1.5 kg of H2O you need to use about 3 liters of liquid oxygen because water packs denser than liquified gas Certain combinations of liquids also give counter intuitive results. If you take 1 liter of water and mix it with 1 liter of alcohol you don't get 2 liters of liquid, y... |
why is it a big deal for Trump to remove security clearances of former CIA/government workers? Surely, once you've left such a sensitive job you're security clearances should be revoked anyway. | Just because you left a job doesn't mean you aren't called upon from time to time to consult. Imagine an incoming CEO not able to talk to their predecessor about the job. Experience is valuable, especially in positions where clearance is heightened. Not everyone needs to keep it, but many do.Recycling my comment from a... |
How does game textures owrk? | The resolution a game is running in , is not the same as the size/resolution of the textures on objects in the game. Larger textures = greater resolution of the individual objects, relative to how far away the viewer is. That last point is important. If you have a big, nice texture for the side of a barn, that side of ... |
Why is water necessary for life? Why can't life exist without water? | For your second question, it's entirely possible that life could possibly exist without water and we simply haven't discovered it yet. However, when looking for new life forms, we have to narrow our focus somehow, so comparing it to life that we already understand is an easy starting point. |
Why does Venezuela have hyperinflation? | When oil was expensive, say the Venezuelan government was making $60B and spending $40B . Everything is rosy, so they can start spending more on social programs that make the government more popular. Now they are spending $60B, but oil becomes cheap, and they are only making $30B. They *could* cut those social programs... |
What exactly is health insurance? | Medical Insurance is something you pay for, which 'insures' that you are covered for health care. There are tons of diff kinds, whether it's through your employer, private, or medicare. It's a good idea to have it or get it, if you don't. Out of pocket is extremely expensive, and not suggested. Are you working? If so, ... |
Why can certain videos look higher definition than real life | I honestly don't know what you mean. This actually happens to me, but it's because I need glasses.Show someone an HDR photograph or a movie at 48 FPS, and they’ll say it looks fake. But all photographs and cinema are abstractions of reality. What they really mean is it doesn’t look like the other photographs and film t... |
how do our brains let us talk without deliberately thinking? | Drastically formulated: you learn to speak before you learn to think. The amazing part is that you're actually able to think without speaking out loud.We sure have that ability, but wouldnt it be nice if people formed a sentence, then think over it and only say it? |
the scent of mowed grass is a warning sign for other grass for the danger that is coming. Since grass cannot defend itself, what’s the purpose of that? | It's something like the grass saying 'hey i'm being hurt and you are probably gonna be hurt too' to other grass. So then the other grass makes chemicals that make the cut parts grow back faster and also emit chemicals that prevent fungal infections, etc. So its not to defend from humans mowing but to healthily and safe... |
Why does the water from lakes not sift into the ground? | There are other types of lakes, called 'perched lakes'. These are made when you have a dip that is covered by something that water can't flow through, such as rock, or compressed clay. This forms a sealed layer, trapping a pool of water.The ground under a lake is generally rock or clay within a couple feet down which b... |
Why can we make 911 calls literally anywhere regardless of service but can't make regular calls? | You can't, literally anywhere. If there is no network servicing the area, your phone can't create one out of thin air to call 911. However, if your phone can reach *any* network, they will allow 911 call through because it is expected to be *of an emergency nature.* You can't make regular calls this way, because the co... |
What's the difference between clinical depression and sadness? | Sadness is okay, because bad things happen, and getting sad is a way for us to cope with things like loss, unfairness and other things. When you're sad, it happens because something bad has happened to you, and it goes away quite quickly. You can be cheered up after being sad. Depression happens inside a person, for re... |
IF you turn off the light in your room, where does the light go? | It gets absorbed by all of the materials in the room. Since light travels so fast, you can't see it fading out.It is absorbed by the walls or anything else it hit. The energy is primary converted to heat.It's absorbed by the objects in the room, and by the walls. A fair fraction of this light is actually re-emitted, bu... |
Why can't we just do fission and fusion on the same atoms an unlimited amount of times? | Because they work on different types of atoms. * You can fuse very small atoms together and gain energy.* You can split very big atoms apart and gain energy. The closer to the middle you get the less energy you get out of it. Once you reach iron you can't get out energy by either fusing or splitting it the atoms. Atoms... |
When you show something you like very much to someone you know, why does it feel less awesome in that moment? | I think it's mainly because your judging it a lot more harshly now because you gave it your endorsement. You might also be worried that if person doesn't like it, they may think less of you. |
How do bladeless fans work? | They're made of lies. The blades are in the base and air flows upward and out through angles slits", 'Here are a couple videos that show the [teardown of a dyson bladeless hairdryer ]) and [the motor that makes it work ]) |
How does Captcha know the solutions to all of its tests? | It doesn't know the answers. What it does is give the same test to bunches of people and assumes that the most commonly given answer is correct. |
Why can't cancer just be "cut out" and what makes it inoperable? | If it's caught early enough, it can be removed. A lot of the time, it's already spread too much. It also depends a lot on the size and location of the tumor. Some things just can't be removed. Once the cancer has spread, cutting out anything won't prevent it from coming back. Also, I think, any type of cancer that invo... |
why are loading bars inconsistent? | Ahoy, fellow redditor. Yer not alone in askin', and kind strangers have explained: 1. [Why do the first 98% load so quickly, but the last 2% take so long? ] ^1. [ELI5: How do loading bars work? ] ^1. [ELI5: Why are loading bars a lie? ] ^1. [Why does the progress bar of a loading screen or download always seem to freez... |
How are store brands cheaper than name brands, when name brands are more mass produced and store brands are obtained by buying production runs? | Store brands are mass produced as others have said, but the interesting point is that the company that is mass producing the store brand might also be producing the name brand product sitting on the shelf next to it. To the name brand company, they may not ultimately care if the name brand or store brand is purchased b... |
How exactly does chemotherapy work and why does it seem to be the most common treatment for cancer? | Avast ye! Yer not alone in askin', and kind strangers have explained: 1. [ELI5: How does chemotherapy work? ] ^1. [[ELI5] How/why does chemotherapy kill cancer cells, but not regular or healthy cells? ] ^1. [ELI5:Why does chemotherapy work if it's basically just pumping poison into your body? Why don't we often die fro... |
Why can potent corrosive acids be held in glass beakers? | Well it depends on the acid. :) Hydrofluoric acid for instance is able to strip ions off of silicon dioxide and eat right through it. Amazingly, it cannot do so to many forms of plastic. Acids eat at the structural integrity of a system by disassociating ions from it, suspending them in the acid. Not all acids act on a... |
Why news organizations don’t sue for libel when a truthful article is called ‘fake news’? | CNN would have to show that Trumps insults hurt the network, financially. In America, celebrities and companies can't just sue people who insult them. The price of being famous is people can insult you. The President has fairly broad immunity to commit crime basically. It would be strange for a news organization to sue... |
What would life really look like if ALL single-use plastics were banned? | Just imagine your doctors visit. No more gloves during surgery, your vaccine shot would also look a lot different etc. There are areas where single use plastics is important. But then in others it's completely unnessecary. |
Why do car manufacturers keep making similar styles instead of rebooting a more vintage style that people would spend crazy amounts on, or even making a new car thats similar to those vintage styles? | A lot of vintage styles come from a time where safety standards varied from more lenient to outright nonexistent. You do see companies lean on their heritage, but they have to take into account rider protection, crumple zones, the angles of the front of the car, and many other facets. It's why in a lot of those reinven... |
How do stores profit from offering cash back on purchases? | When you get cash back, the store isn't just giving you the cash out of their profits. If you look at your receipt it shows $40 cash back. So if you spend $10 and get $40 back, your total bill $50. That $50 is what is charged to your bank or credit card and it comes out of money you have deposited or will pay. Now, tha... |
Why would an airplane have to circle around for hours burning off fuel to make an emergency landing instead of just flying to its destination and making the emergency landing there? | Various reasons. In the case of Post Malone, if they flew across the Atlantic, they're running the risk of something else going wrong during the flight, in which case they're thousands of miles away from any airport - if they circle near where they take off, they can divert to any number of airports. Also, there's no g... |
Why is it such a bad thing when house prices go down? Isn't this a good thing for people wanting to buy a house? | It is good for people who want to buy a house, sort of, but it isn't good for people who *have* houses and are going to be selling them. The decrease in house prices represent a real loss of savings of those people. For many their house represents a good chunk of their retirement so when that loses value it is like the... |
How do communication waves travel in space, for example between the Rover or Apollo and NASA. Don't waves need matter to travel? | They are not matter waves, so they don't take matter to travel in. They are electromagnetic wave pulses, usually called photons, that travel in the quantum electromagnetic field. |
What happens to the presidency and political houses if Trump is convicted? | The presidency exists no matter what . If Trump stops being president for any reason before the end of his term the VP Pence takes over and serves out the rest. If VP pence can't do it for some reason then there's a hierarchy and same thing, they serve to the end of the term. The election happens regardless and anyone ... |
If STI/STD's are sexually transmitted, how do they originate? | For some, they've simply always been. Preying on and co-evolving with humans and their ancestors for millions of years. Viruses are likely the oldest specialized predator, preying on the very first cells in the primordial soup. For others, they originally had a different transmission vector or target species and later ... |
If everyone knows that companies use the psychological 9.99$ trick instead of just saying 10$, why do companies still use it? | Because it works. First of all, a lot of people don't know about this trick, hence why you can search this sub and see that people keep asking why prices end with 99. Secondly, just because you know it's a trick, doesn't mean you won't subconsiously fall for it. |
How does traveling faster on a bike make you more stable? | angular momentum. Momentum means something at rest wants to stay at rest. And something moving wants to stay moving. Unless something tries to prevent it, that's what things will do. Keep moving if they already are. Not move if they are already stationary. & #x200B; If you spin a wheel, it will want to stay spinning du... |
Why do puppies potty train so much faster than babies? | Dogs age and develop quicker than humans. Pretty much all animals develop quicker than humans. It's partly because our heads are large, and before they get too big while in utero, the baby is birthed and finishes developing outside the womb. |
- how did the recorder become the instrument children learn in elementary school? | It's extremely cheap / durable while being pretty small and easily portable. It's something that can easily be tucked away in a backpack for example not like a guitar or piano for example. All this while being a pretty simple instrument making it good for learning some music fundamentals. |
How is water digested? | Some of it does get absorbed into the bloodstream. Some of it stays in your GI tract. The reason you don't overhydrate is your kidneys release excess water, salt, and other crap as piss. The more water you drink, the more gets dumped as piss |
Why ISS don't perform a constant movement to create G Force so astronauts can avoid bad results of the Zero G environment? | The are two ways you could do that. 1. Acceleration: when you accelerate a spaceship the people inside experience the movement of the ship like they are being pulled towards one side.The problem with that is you get faster all the time and that is consuming fuel and had a number of other problems. 2. Centrifugal force:... |
what happens to your body during a drug overdose, and how can it be stopped immediately? | If you OD on water , it dilutes the sodium in your bloodstream, which messes with your body's ability to regulate the amount of water in your cells. They swell up, and you get symptoms like fatigue, cramps, headache, nausea and vomiting, irritability, seizures, and eventually you can fall into a coma. |
How could different human species reproduce to make fertile young? | Growing up you are taught that animals must have the same gene sequencing in order to breed but that's simply not true, the genes simply must be similar enough for breeding to happen. You can see cross species breading throughout many mamals, and humans were no exception back when neanderthals and other species had a c... |
Why can many land animals learn to walk and sea animals learn to swim and navigate the day of their birth but humans can take up to 9 months to begin walking? | I read somewhere that our evolutionary track encouraged much larger brains for our size than most other animals. This much larger brain would cause a lot of birth problems for the mother and child so the kid is born before the brain and skull are complete. This makes it so the brain isn't completely functional at birth... |
Are radio stations able to tell how many people are tuned in to them at any given time? If not, how do they estimate listener numbers for setting advertising prices? | For Traditional radio devices you don't know, you can only guess using survey's For Digital Radio i believe you do know exactly how many people are listening and where they are. |
A commonly touted problem with the Hyperloop is that the expansion/contraction of metal with temperature would make pressurisation impossible. How do conventional railways deal with this problem? | It's not positive pressurization, it's negative pressurization . The vacuum and/or pressure gradient is used to reduce drag and air resistance and the gradient of pressure can also be used to propel the train forward, by reducing pressure in front of the train and increasing pressure behind it. Conventional trains oper... |
How does an animal, that has never had a type of food before, understand that it is edible? | How does a person that has never had a type of food before understand that it is edible? You might rely on the fact that it looks and smells similar to other foods you've had before You might trust the fact that it's food because someone that has given you food before is presenting it to you in a manner that they norma... |
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