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What is the half-life of an atom? | Half-life is a **statistical** measure. It's like an average. That means one atom doesn't have a half-life, isotopes do . An element is defined by a number of protons in its nucleus. An isotope of an element is defined by the number of neutrons in its nucleus. Like, 6 protons means Carbon, then 6 neutrons means ^C, 8 n... |
How can pregnant women do Fentanyl (epidural) during labor without harming the baby? | The fentanyl is injected into the epidural space before labor for pain control along with a local anesthetic. The fentanyl is usually a very small dose. The epidural space isn't exactly an area of rapid absorption so it slowly is absorbed by the mother. Some of the drug is absorbed into her blood and does make it to th... |
If the water cycle is a closed system, why does it matter that a pound of beef takes 1800 gallons of water to produce? | It doesn't matter in many parts of the world - if water is drawn from the river, used to irrigate fields and then it returns to that river later on it's all good. It matters e.g. in parts of the US where deep underground sources of perfectly drinkable water are used for irrigation on a desert - that water will evaporat... |
in biological terms what causes car sickness? | Your inner ear detects balance and acceleration. If can tell if you are speeding up or slowing down. Your eyes can also tell this. In a car the seat, dashboard, and the interior of the car all appear to be sitting still. You are not moving around in the car. So you eyes think you are not moving. But you inner ear can d... |
When you're driving on the road whilst lost deep in thought, does the subconscious / muscle memory ensure you're driving properly? Looking for an ELI5 on this. | Your subconscious isn't driving the car for you, you still are. However, since nothing interesting is happening, your brain does not save the experience even into your short term memory, it just discards it completely. This is why you don't remember anything, not because you dozed off or lost consciousness. |
What happens inside the computer when you, for example save a word document onto the hard drive? | The application makes a request to the OS to write to a file. Typically this will involve a path/filename, a memory buffer and a length. The operating system takes that request and figures out where on the disk it needs to go from the pathname . You can't access individual bytes on a hard drive.. access is limited to b... |
Why are camera lenses round instead of the same shape as the photo they produce? | A) It's easier and cheaper to make them round, especially when the lens-mounting may spin in the process of zooming or focusing. B) there are different formats of camera film/sensor, and it would be more expensive for everyone involved if a lens only worked with a limited selection of formats. |
how come breathing is the only autonomous system we have direct control of? | It's good that your breathing is mostly autonomous. That way, you don't forget to do it and die. However, it's also useful to be able to directly control it, for instance, when you go underwater, and while you are eating or talking. If you couldn't directly control breathing while underwater, your lungs would fill with... |
How did we first figure out that light even had a speed that could be measured? | Ole Rømer first demonstrated in 1676 that light travels at a finite speed by studying the apparent motion of Jupiter's moon Io. —Wikipedia |
How can a game on Xbox/PSN freeze if its a digital download and doesn’t require a disc? | Freezing isn't something that only happens to disc based games. Video game consoles are the same as computers these days and can suffer similar issues though not as often as one company controls what software gets installed and what hardware is used. & #x200B; Ultimately all of it is still made and programmer by humans... |
How do animals (and humans) know what food is? | Smell and taste, which evolved over time. That's why many harmful substances taste really bad, and food tastes good. That's also why rarer foods taste even better. The organisms that developed those tastes were more likely to survive, whereas the ones that didn't have a really bad taste for poison were the ones that di... |
Why arent our eyes reflective in the dark the way animal eyes are? If you see an animal in the dark, it looks like their eyes are glowing. | we aren't nocturnal. in nocturnal animals, the area behind the retina is reflective allowing light to pass through the retina again for better nighttime visibility. source: i used to dissect cow eyes at the Exploratorium |
What happens when an american start-up company that's funded by a foreign investor becomes profitable? Is the foreign investor kind of like its owner? | Depending upon how the funding was arranged. If it was a loan then no the company is owned by whoever started the company, but if they can't pay the loan then the company assets may default to who loaned them the money. If the money was exchanged for a proportion of the company it might be split between the original pe... |
Why do our eyes strain when we look up instead of down when we're awake, even though they automatically rest looking upwards when we're asleep? | > even though they automatically rest looking upwards when we're asleep? They don't. Your eyes don't roll back into your head when you sleep, not sure why you think they do. |
How does colour restoration work with old black and white photographs? | It's largely manual, although increasingly computers are getting okay at figuring it out. But it relies on you knowing what color it's supposed to be and then just adding those colors to the existing shapes. |
If clouds are made of water vapour, how is it they maintain shape even when being blown through the sky? | Water naturally wants to bond to itself. It's why when you pour water onto a surface it forms into pools or droplets. Press your finger between two droplets and slowly lift up and they'll connect together quickly. No difference with water vapor or the gas version of water. It still wants to bond to itself. |
Why censoring the eyes (and not others parts of the face) in a persons picture is enough to make them unidentifiable? | This is actually a pretty interesting question. I hope this gets more attention and we get an answer. I'm interested as well. |
How does the directional system work in space? | We define directions based on faraway stars, if I understand your question right. Since they're so far away, it doesn't really matter where you are, two people pointing to Sirius will be pointing in the same direction. |
why does hot asphalt appear to reflect the image of cars from a distance? | To expand from MyNameIsGriffon: The really temperature gradient where it's hot at the bottom, getting cooler as you go up leads to a situation where light 'bends' upwards, because The speed of light is marginally faster where air is hotter _URL_0_. Since the air that came from above ground reaches the ground then gets ... |
Why do our bodies store excess fat, sugar, cholesterol etc but not water or vitamins? | Think of it like this. This is a very crude way of explaining it so bare with me. Get you a strainer Put some dirt in it a little comes out, but overall most stays in. Put some small chipped rocks in it same as before only less now. Put some bigger rocks in it ..nothing comes out. Now put water in there .a fuck ton wil... |
How come lobsters are semi-immortal, while shrimp have short lives? | Humans and chimp have a common ancestor and very much look alike. Yet chimp are immune to Alzheimer and we are not. Why ? We don't really know, but two different species even if they look very similar can have a completely different physiology. |
Why does the world appear faster at night? | > Ever since I was a kid I always felt like everything was faster at night. It's all in your head. Things don't feel faster at night. This is your own subjective experience. There is nothing to explain. |
How does a country officially declare war on another country? | Depends on the Government. If it's a Democracy it's generally voted by some form of the Govt. For the US the President will ask Congress, with houses vote. But I imagine a dictator can do whatever he/she wants as long as his/her military follows that person's orders. |
How can a material keep you cool in warm temperatures and warm in cold temperatures? | It can't under normal circumstances. Metabolic heat must constantly be dissipated to the environment at a rate more or less equal to the rate it's generated otherwise you will overheat or freeze. All insulating clothing does is slow the rate of this dissipation. A jacket in the winter will slow the dissipation of heat ... |
why does the magic of imagination deteriorate as we age? | Because you don't exercise it. If you sit down and set a timer and force yourself to imagine stuff you can get good at it again. Just do five minutes per day of imagination for 30 days and your imagination will be powerful again. |
How come when you're in a coma you're body decides to use up or burn the muscle away first instead of fat? | When I injured my knee, I had an operation to correct it. But after only 3 weeks of recovery, my friends laughed at how small my right thigh and calf muscles had become. After intense physiotherapy and playing sports again, my right leg grew back to the same size as the left leg. Muscles will waste away even when you a... |
Why is tickling usually uncomfortable, and why does it cause you to go into a laughing-seizure? | It causes discomfort because your body thinks its in danger. And that laughter is actually mild fear. Why, usually we feel ticklish in places that usually hasn't been touched . So when it finally is, your body panics. |
Why do video games strain the GPU but high quality movies that literally look like real-life, do not? | Movies are pre rendered. The storage is giving it an image and it displays that image. So for example, whatever the lighting is in the movie is what gets displayed. You can't change the angle of the light on the fly. You can't change your point of view. It's all already done. A video game just calculate all of those th... |
What is the purpose of Netflix's "are you still watching?" feature? | Netflix does not use any compression or caching in their video streams, so stopping playback if you're no longer watching is a good way for them to cut down on their bandwidth usage. |
How does a gravitational force in/around a black hole work. I understand all that mass squeezed in a small space creates gravity but how can gravity radiate from black holes when even light can't? | Gravity often uses the wave or field model, but it's not a physical thing that that radiates out from the centre of the black hole. Gravity has no mass and isn't affected by gravity. Instead, the existence of the black hole itself creates the gravitational field.I good way to visualize gravity is a suspended flexible s... |
Do modern fax machines make that screechy dial up noise out of necessity or is it something it is programmed to do for consistency/familiarity? | The person hearing the dial tone, the numbers being dialed and the connection sequence is only for user confirmation, you hear it being sent. There is usually an option to silent dial, but the people wouldn't be sure if it's being sent. Kind of like a gun being racked or the hammer being cocked back before use in a mov... |
Why is it that, in cinematography, the color green is used for special effects? | Most digital cameras have their sensors arranged in what's called a [Bayer filter] - long story short, because human eyes are very sensitive to green, digital cameras have twice as many green sensors as blue or red. So with a green background, you actually have double the resolution to work with when you're determining... |
Why are root vegetables so intense? | I've eaten whole raw potatoes before with no consequence. Usually only one at a time. I remember eating a very large one once when I was like, 7. |
why did our brain evolve to dream during sleep time? | We don't really know what dreams are, but it's pretty likely that they're the side-effect of other processes. The brain still does things while you're asleep and the complex web of cells is going to have some loops and such where multiple circuits overlap. Dreams are kind of like when you turn on an extension cable. Yo... |
Why is fluoride the main ingredient for toothpaste? | It's not the main ingredient per se, but it is part of it, because fluoride helps calcium and phosphate bind to your teeth. Calcium and phosphate are what forms the enamel coating the outside of your teeth. |
What is this so-called 'virtue signaling' and why is it considered a bad thing? | It's supposed to mean that someone is only publicly speaking out against something bad done against someone else because they get something out of it. And sometimes that might be so. Most of the time, it's something people say when they don't believe that anyone *ever* does anything for someone else without wanting to ... |
How does HIV/Aids work, and why does it damage the immune system so severely? | HIV infects white blood T4 cells - the cells your body needs to fight off infections. When your body no longer has functional T4 cells you are considered to have AIDS, and you can die from any random infection that most people could easily fight off, like the common cold or a papercut. Contrary to most responses HIV do... |
If water become a gas in a vacuum, wouldn't it be more efficient to build a steam engine inside a vacuum chamber ? | A vacuum chamber would be a completely sealed environment and there would only be a limited amount of work that could be performed by it. Once you've extracted that much work, it becomes useless and you'd have to replace it. And, almost certainly, the amount of energy required to depressurize the chamber in the first p... |
What is the difference between "Frames Per Second" (FPS) and "Refresh Rate" (Hz)? | Hertz is a unit that means that something is happening a specific amount of times per second, so technically *x* FPS and *x* Hz are the same thing. However, FPS typically refers to the number of frames that an application can process per second, whereas refresh rate is the number of frames that the monitor is capable o... |
Why Are Wild Orca's and Dolphins So Chill Around Humans? | Wild dolphins aren't as stressed out around humans as those are which have been captured and forced to do tricks. They're as smart and as social as we are, and the biggest difference is that they don't have thumbs. They get bored same as we do. |
Why do projectiles move along with the Earth's rotation? | Imagine you are riding in a bus. You toss the ball in the air within the confines of the bus and the ball doesn't suddenly fly backwards and hit your face. It is because you and the ball are both moving at the same speed inside of the bus. Because you and the ball are both moving at the same relative speed it looks lik... |
What is blood plasma? | It's the bit of the blood that *isn't* blood cells, the liquid part. Mostly it's water, with a few minerals dissolved in it. |
Why India is the only place commonly called a subcontinent? | Note that the use of the term 'Indian subcontinent' predates the discovery of tectonic plates. The Indian sub-continent is bounded by mountains and other unfriendly terrain on all of its landward approaches. This led to a degree of distinctiveness from the surrounding areas. Not only do Indians look different from the ... |
If boiling something for a few minutes is effective at disinfecting it, why can’t we safely eat spoiled meat, as long as it’s cooked at high temperatures? | Most often that's still safe, but *sometimes* the bacteria that grew in the mean can leave behind toxic waste products. |
why doesn’t Earth get hit with meteors like the moon? | There are some good answers here, but I don't see the most important one. [Jupiter!] Jupiter's massive gravitational field is largely responsible for keeping larger meteors from entering the inner solar system. |
How do technological devices that use magnets not ruin the circuits within the same device? (E.g Airpods, laptops.. etc.) | Because magnets do not disrupt electrical circuits. This misunderstanding came about because magnets *do* disrupt storage devices like hard disks and tapes that store information on tiny magnetized particles. These devices used to be very common, but nowadays we use SSDs and flash memory that are basically immune to ma... |
Why aren't babies allowed to sleep on their side? | Just FYI, for everything about Back to Sleep, when my little one was born back in November, we quickly discovered that she would pull HERSELF onto one side to sleep. Basically the doctor's answer was : put her to sleep on her back. If she pulls herself to her side, it's okay. :) She grew out of it within a few weeks, a... |
Why fighting in Hockey is considered 'essential to the sport' | Many reasons for fighting. Not all of them good. Some outdated. 1. Policing. Plenty of people have covered this, I'm not gonna. It's true sometimes. but there aren't really enforcers anymore, mostly. People who have issues will fight their own fights unless they are a star. 2. Momentum. If your team is getting beaten, ... |
How the data transits online from USA to EU (for example) | Cables are not small. They're massive in diameter consisting of hundreds of fiber optic lines in each, wrapped in protective layers. And there's multiple cable paths that cross the oceans. |
How do you verify you are human with the traffic light question? | Have you considered the possibility that the reason you're having difficulty might be that you're not human? |
How do we know what dinosaurs sound like? I mean I know it’s not 100% accurate but still how do we even guess what they sounded and acted like? | We compare what we know about their bodies to other animals with similar skeletal structure, and use that as a guidelines. It's totally guesswork.Scientists have an idea what they sound like, but it’s important to note that movies like Jurassic Park just mashes a bunch of animal sounds together. That is not representat... |
Time, Space Time, and what it means to "bend" space time | Gravity does not bend spacetime, mass does. Earth doesn't orbit the sun because the gravitational force of the sun bends spacetime. But because the sun has mass it bends spacetime and because it bends spacetime we experience gravity. |
Why do humans enjoy voilence? | Because the humans that didn't enjoy violence were selected out of the gene pool by those who did. Large predatory mammals engage in violent play because it's crucial training for their lives. Human beings are no different, even though modern humans aren't likely to have much violence in their lives. |
What happens when a car gets towed and they are unable to contact the owner? | They won't do shit. If your car is broken down & abandoned or illegally parked somewhere, they'll just haul it off & leave it up to you to figure out what happened. This is generally pretty easy since the first thing most people do upon discovering their car was stolen is to call the cops who will have a record of wher... |
How do IPOs get a price value? Are they allowed to be adjusted based on demand? | The initial price is generally based on the exit value required by the investors. Depending on when you put your money in and what level of risk you assumed, you'll want a certain payout. You set the amount and price of the stock to get that payout. However, selling stock is really no different than selling anything. I... |
how can bugs fly inside moving vehicles? | Do you get pushed to the back of the car? No. The air in the car is moving at the same speed as the car, so it is effectively still, and the bug would think it was in a room like any other. That's only true when the car is moving at constant speed though. When you accelerate, you feel pressed back into your seat. The b... |
Why do stars not move if the Earth spins at 1000 miles (1600km) an hour? | They *do* move. Just not fast enough to notice in a single moment, but you can go outside, note the position of the stars, come back an hour later, and measure how far they've moved, and it will be noticeable. We already know the Earth rotates once every 24 hours, and that there are 360 degrees in a circle, which means... |
Why are there black keys between some white keys but not other ones? | The notes on a major scale have some distance between them.That distance is called tone.If we got a C major scale, we have the following distance:1 tone-1T - 1/2T -1 T - T - T - 1/2 T.While on a guitar every key ok the keyboard is half tone distant, we don't need to differentiate the half tones from full tones. In a pi... |
What effect does possessing non-Homo sapiens genetic material have on modern humans? | > could have Neanderthal or Denisovan DNA. And, almost certainly, DNA from yet a third non-H sapiens that we haven't discovered yet. > Does it affect anything important, like health issues or susceptibility to certain diseases? Not that we can tell. The largest percentage of any non H sapiens DNA found in any modern hu... |
what animals with eyes on the sides of their head see exactly? Can they see both their sides at the same time? | I read somewhere that when they're eating, horses see everything around them but don't see what they're eating. Can anyone confirm this or is this straight bs?", 'Yes they can, but they usually have a blind spot immediately in front of them .Hold something pretty close to your face, for example your phone. Close one ey... |
How do we know what the exterior of dinosaurs actually looked like just based on their bones? | For a long time, we really didn't; that's why lately the consensus on what they'd look like has been changing. Used to be we thought they looked kinda like lizards with scales but there have been enough imprints in the fossilized mud around them to suggest that they had lots of feathers. In general, we take what we do ... |
What are For loops and what is the difference between them and While Loops? | The simple analogy has already been provided, but here is an example. The basic structure of the for loop is this: for{ < block > } Which is analogous to the following while loop < initial statement > ; while{ < block > < increment > ; } while loops are handier for conditions that you don't really know when are over or... |
If you are neither book smart, nor street smart, what is the point of living? What meaningful impact could you make on the world? | Happiness. I have a sister with a mental disability, her brain is equivalent to that of a 6 year old, she is 27. But she does her best to make others happy. Almost everyone she meets she makes smile. If nothing else, we all have the power to make someone happy, even if we cannot cure cancer or aren't smart enough to fi... |
Why does world wide oil production never overwhelm current storage facilities? | The distribution facilities reduce purchases when their sales fall below their purchases. The refineries reduce production when their storage starts filling up. The offloading facilities fill up when the refineries take less oil. The tankers can't unload, so they hand around waiting and can't go back for more oil. The ... |
Why does gravity drops off so fast? | > Astronauts have zero gravity They don't. At the height the ISS orbits , Earth's gravity is 88% as strong as it is at sea level. Earth's gravity is what keeps the ISS in orbit around the planet - if there were no force acting on it, the space station would travel in a straight line. Given that the Earth's diameter is ... |
Why do movies cost so much to make? Budgets are often in the millions. Is it the equipment? Paying the actors/crew? | thousands of people involved in a single movie project. actors, filming crew, lighting crew, set building, makeup, costume, props, editing, sound, etc etc. & #x200B; even if you paid all non starring persons only let's say $50k, just have 20 people means you're spending $1mil. teams can be 5-10 people or higher. and se... |
Why does blood rush to our head when upside down, but not to our feet when we stand upright? | Because we have valves in our veins that keep the pressure regulated but the valves only go one way so when we are in the unnatural position of being upside done our blood pressure changes, increasing in our head. Our feet don't feel that because the veins and blood pressure are evolved the way they are cause we walk u... |
How did I get a phone call from my phone number? | It's basically just an app or website that allows you to choose any number you wish to make a call from. Back in the day used for prank phone calls. Now, still prank phone calls or occasional scammer slipup. |
How does a blood test work? | Yes, it takes the state of your blood at the time of drawing it. If you fill it with something they are testing for than yes it will show up. As for taking a lot of iron supplements beforehand it will likely corrupt the results, depends how fast your body absorbs it. Doctors don't expect patients to cheat serum blood t... |
How did home computers go from an altaire 8800 to an apple ][ in only 2-3 years? Please more specific then just "Steve Jobs happened" | I had to google this Altair 8800: 495$ in 1975 Apple ] [: 1298$ in 1977 & #x200B; The Altair had 2 MHz CPU and default 1/4th KB RAM The Apple ] [ had a 1 MHz CPU and 4 KB RAM & #x200B; So you see, even though the Apple is two years older, it's not really better in terms of computing power, the real seller war the 280×1... |
If an atom is mostly empty space, how are we able to touch anything, and how do atoms combine to make something solid? | Have you ever held two really strong magnets near each other ? That's basically what is happening on the micro level. Nothing ever really touches anything else, it's all electromagnetic forces at the human scales. |
why can babies learn languages just from listening to them but not us grown up people? | Go to a foreign country where no one speaks your language, and you have no contact with people outside that country. I guarantee within two years you'll understand and speak whatever language they speak pretty well, and be fluent after 4-5 years. In other words, you'll learn that language fully just from listening. Stu... |
Why are we able to freeze cells like sperm , eggs and embryos and they stay alive - but we cannot freeze an entire animal without it dying? | They are small and freeze virtually instantly before ice crystals have a chance to grow large and puncture cell walls. It takes a long time to freeze a whole animal. Or, strictly speaking, allow the heat to escape into the cold surroundings of a freezer or cryogenic liquid. The cells get disrupted due to the slow freez... |
Why do babies cry immediately after exiting the womb? | Somebody may correct me if I'm wrong but I think it's mostly because it's pretty painful to change from breathing uterus liquid to air. |
How did denim become so popular? | Actually, Levi Strauss was just a successful dry goods wholesaler and not a pants maker. The original blue jeans creator was a tent maker named Jacob Davis. Davis went into an agreement with Strauss as a way to get help patenting the riveted pockets in the durable pants he created for Nevada mines. The riveted pockets ... |
why does cold water quench our thirst better? | I don't think it does, I prefer room temperature water and end up drinking more water when it's room temperature |
Do animals see different stars than those we see? | Animals that can see stars see the same stars we do, but they don't all see them the same way. Bees and reindeer can see ultraviolet light, and there are a few species of mantis shrimp that can see colors and waves no other creatures on Earth can see. |
How do billionaire stays a billionaire when they file bankruptcy and then closed their own company? | Mostly, businesses ran by people with that kind of money are corporations, which are owned by other corporations, which are owned by other corporations, which are owned by the billionaire. these several layers shield the billionaire from any real culpability. Also, even if a billionaire loses 10 million on some failed ... |
If the the tail of a Prince Rupert's drop is the main weak point on the drop, how would a tailless Prince Rupert's drop work? | According to [this], it's possible to make, though probably not through dropping it. The post suggests melting the glass in space so it forms into a sphere under its own gravity. Cooling it would be tricky, perhaps losing heat through radiation might work. The result would be a glass sphere with no overt weak point. |
Is NASA able to recover the curiosity rover? Would it be destroyed or completely lost by the time we are able to do that? | It's probably in the range of our technical capacity in the near future, although it wouldn't be particularly easy or expensive. The rover weighs about a ton, so it would be much bigger than anything currently on the table for a sample return mission - which tend to only imagine returning a small collection of rocks. |
Why was cursive taught before the prevalence of typing in most workplaces? It's it supposed to be faster printed characters? | So just to piggyback along and make something clear for younger redditors: back in the day people put a TON of effort into having really good handwriting. Why? Because that's how you did like 99% of professional communication. Having shitty handwriting would absolutely solicit negative judgement. Write your bank office... |
If adderall calms you down if you have ADHD, why does it make you go crazy if you don’t have ADHD? | Dude with adhd here. Not a doctor but if I remember what my psychiatrist told me it is because we have a different sensitivity to dopamine. Usually when you have adhd, you dont produce enough dopamine or aren't sensitive enough to it. Which is why people with adhd usually cant focus and sit still. We need more stimulat... |
how does a viral infection turn into a bacterial infection? | Your body is like a building with security guards. Some guard the door, and some roam the halls. Others show up when alerted for specific intruders. When you have a viral infection, the virus may have taken out some of the guards, and the ones alerted to the virus aren't looking for the bacteria. There's chaos and conf... |
Why do pain relievers such as acetaminophen not work as pain preventers? | They do? My doctor tells me to take them 30 mins before my TMS, and I've also done that for IUD insertions.The sharp "stabbing" pain that you first feel when you get hurt and the dull "aching" pain that comes on after that are caused by two different types of nerves and are essentially two separate systems. The stabbin... |
Can a capitalist economy function in a zero growth environment? If so, how? | Capitalist economies continue to function in zero growth, look at Japan. However, the people don't enjoy it, and they tend to take out their grievances on their elected officials. As a result, most capitalist central banks have a bias toward slow, steady growth.It can function in a stalemate, or even in a complete back... |
why pillows, blankets, etc have those tags that are "penalized by law" if removed by anyone but the consumer | It's similar to food labeling laws, you'd see similar penalties if you blanked out best before dates. Those tags have manufacture dates on them that are mandated by whatever authority the distributor is based in to be displayed. Bedding believe it or not has a sell by date like food, although the shelf life is obviousl... |
Why do inqueries to your credit have a negative impact on your score? It seems it would be a good thing to shop around to find good rates. | Applying for credit has a negative impact because it implies your full debt picture isn't clear let's say I have a car dealership run my credit yesterday w/ regard to a possible car purchase, and today I apply for a mortgage. My ability to pay my mortgage would be impacted by whether I also take out a car loan, but at ... |
how come when you look at the sun or a star in space, you're looking back in time? | The light takes a certain amount of time to reach your eyes, which you will admit is what it means to see. You don't notice the effect in your house because it's so fast, like when you turn on a light. But stars are so far away that it takes minutes in the case of the sun, or years in the case of any other star. Meanin... |
How some sneakers have higher market value than bench-made bespoke shoes. | > If demand for a certain type of sneaker is such that they are selling for thousands of dollars, economics would dictate that someone would just make more of those sneakers Why would the monopolist want to undercut their own monopoly? > or a close substitute until the price fell close to the marginal cost of productio... |
how can non profits get away with paying so little | If it's $90 for a 40 hour week, check how many hours are considered 'paid' and how many are 'volunteer'. If you're getting $90 for a full 40 hour paid week of work, then I'm pretty sure even non-profits have to pay whatever the legal minimum wage is in your state.“$90 a week” is pretty meaningless without knowing how m... |
What are long exposure shots? Can I click them using a smartphone camera? | As far as I know you can't do it with a smartphone. In a normal picture the shutter of the camera opens and shuts really fast and the image is taken from the light that was captured in that fraction of a second, so that the picture is still. This is why cameras with a really fast shutter speed will generally take crisp... |
Why does our body want to throw up when we experience motion sickness? | If you consider all the ways you can get motion sickness, the only one that can happen without some form of technology is spinning in place. & #x200B; The reason you get nausea from motion sickness is because your brain doesn't understand what motion sickness is. It is getting conflicting signals from your eyes, inner ... |
How developed are other animals' sense of taste? Is it just primal notions like bitter=bad and sweet=good or similarly as complex as ours? | Depends on the animal. Cetaceans like dolphins have very little sense of taste; they can taste saltiness, that's all. Other animals have a wider palette for their palate, and definitely favor some foods over others. |
Why are outside temps of 95+ uncomfortably hot even though that’s so close to our internal body temps? | We are little furnaces always generating heat. We actually generate more heat than we need most of the time, so we prefer to be wherever the temperature isn't too cold, but cold enough so we don't overheat. We think of room temperature as 70F/22C as mostly comfortable. & #x200B; When it starts getting close to our body... |
Why is being overqualified for a job a bad thing? | Business want the job done for the lowest possible price. The ideal candidate would be someone who is capable enough to get the work done, but not so good that they can't be replaced. Also they would have low salary expectations. Overqualified people would either get bored and leave, or become so integral to the busine... |
Why do washing machines have their own concept of time? | Often the delay will be caused by an uneven load during a spin cycle. My machine is a front loader and if the load isn't balanced it will keep restarting the spin cycle until it balances. So the timer says 8 minutes remaining for as long as it takes to balance the load."if everything goes well,this will be done in abou... |
Why do massages make us feel better if something is in pain? | When an area is injured, your muscles tighten up to protect the injured area. Massage can loosen those muscles and result in reducing your overall sensation of pain. The injured area will still be painful, but you won't have the added pain of overly tight muscles. I have rheumatoid arthritis. When a joint becomes infla... |
Why nails only grow on that specific area? | Fingernails are to aid in gripping items. It gives a firm surface to squeeze with. Otherwise it's be like using jelly tongs |
Why do "eleven" and "twelve" have special names instead of being oneteen and twoteen? | ten and seven"Well my comment got removed. But there is a video from Name Explain called, Why is eleven not called oneteen? Explained it better than I ever could, and explain 12 tooAs a side note, the special names for 11 and 12 in English are linked to slower development in children in regards to math and linguistics ... |
Why isn’t Braille used on everyday items bought at grocery stores..such as food items and house cleaning supplies? | No law requiring it, and it's not enough of a money-maker for the market to take care of it on its own. If there was money to be made well beyond the costs of adding Braille to every package, there's no doubt it would be added. Flat labels are easy to print. Raised/3-D labels are far harder and more expensive to print. |
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