query stringlengths 8 249 | answer stringlengths 45 7.8k |
|---|---|
Why is paper used to substitute plastic (such as paper bags, paper cups, paper straws etc.) if it costs our trees? Is it more eco friendly? | Those things are usually recycled from old paper products, so it rarely costs our trees, or at least use less trees . The production of wood- and paper-based products have a much lower economic impact than oil-based products, and the perhaps less arguable reason being that wood is a relatively limitless source, as we c... |
If marbling of the meat determines its quality, why do people trim off the fat? | It's like saying: If you like butter on your toast, why don't you just eat a stick of butter? |
the Boeing 737 Max uses a computer to 'fly against nature'. What does this mean? | A ball in a valley is a simple example of a stable system. If you move the ball, the ball returns to the original position without further effort. A simple example of an unstable system is a ball on the top of a mound. It may sit still, but the first wind or vibration and it will be quite hard to keep on top of the hil... |
If the Gregorian Calender we use today only took effect in the 16th century, how does this impact the accuracy of dated historical events prior to then? | If you are posting from the UK or former British possessions , the Gregorian calendar didn't take effect until 1752, when the Calendar Act of 1750 went into effect . The change really doesn't affect the accuracy of events, *as long as you know the calendar the original writer is using*. For example, Dutch sources recor... |
Why do milk jugs in the US invariably leak from their cap, but not other liquids? | The plastic bottles in Canada leak too. It drives me insane and it's a major factor why i never get plastic milk jugs bagged. |
Why do people use the color 'green' for greenscreen and not any other color? | Because it doesn't conflict with various skin tones or natural hair color. This article explains it well._URL_0_ have a read.They use different colors based on what they are trying to film. But green is because there is not much green in humans. :P', "The greenscreen is for something called Chroma Key. Where they edit ... |
How do vehicles detect how far you can go on your current amount of gas? Wouldn’t sensors not work due to the gas sloshing around? | Through averaging. The computer in the car keeps track of exactly how much gas the engine has been using, and it also keeps track of how much the car has traveled. With this information, the computer calculates an average of how many miles the car can travel for every gallon of gas it uses. The fuel tank sensor doesn't... |
What in electricity gives you power? | Power = current * voltage So, a light bulb filament glows because it's very hot. The power used to heat the filament is determined by the current multiplied by the voltage dropped across the filament. The resistance is how hard it is for electricity to push through the filament, and the current is how much electricity ... |
How is Pi programmed into calculators? | When calculators require the ability to determine Pi beyond a programmed precision, they can use _URL_0_ and the power series for arctan to quickly compute hundreds of digits, should the need exist. However most calculators don't have this programmed in, they just have a fixed value which is Pi to as many decimal place... |
Why are there always a bunch of super long infomercials on tv only at hours when no one would be watching tv? | It doesn't cost the television station much to broadcast a signal. What costs more is creating content or licensing content . If the TV station does not think they will make enough money selling commericals to make up for the costs of creating or licensing the content, then they'll sell the entire block of time to the ... |
Why use essential oils? | you shouldn't use essential oils. They don't work. It is not really any more controversial, than homeopathy, chiropracty or any other type of snake oil. Some people think it works, but they are wrong. This is not the type of thing where there are two sides of an issue. There are frauds who tell you that they can heal d... |
Pi was recently calculated to the 31 trillion digit by Google employee Emma Iwao. Is there any benefit to calculating pi more and more accurately? | From what i saw in another thread 'no'. I think they said NASA only uses pi to 14 decimal points so if they don't need it longer most math won't either. |
Why do radioactive materials decay at a predictable half-life yet there’s no way to know when one molecule will decay? | Imagine you are draining water from a large water tank. You can predict using the flow rate, when you will get to half a tank of water. But you would not be able to predict when one particular molecule in the water gets out of the tank. Or consider flipping a coin 10000 times. You will more or less get it correct if yo... |
why aren't there any small sea mammals? | There is minor reasons like needing to be a certain size to have enough insulation to stay warm. There is fresh water stuff like platypuses and beavers that are pretty small. etc. I think the real reason though is there just aren't many mammals that make the jump to sea living. All the sea mammals all basically descend... |
Why do electronics usually require 2 batteries instead of just one bigger battery? ie: 2 AAA instead of 1 AA. | TLDR: Batteries are often chosen to optimize size + weight of the device. AA, AAA, C, and D batteries all have the same voltage , the major difference between them is how long they last. The larger the battery the more energy storage it has, so the longer the battery will last. You can replace the batteries in a device... |
What happens when a compass is in space? | Your compass points in the 'north' direction of whatever magnetic field it is in. There are actually a lot of very large and strong magnetic fields that exist in space, even far outside our solar system. AGNs have some of the most powerful magnetic fields in the universe. The compass would point in the direction of the... |
Why does Russia seem to have an inordinate amount of big meteor impacts? | If you look at the distribution of all detected meteor fireball events over the last 30 years, it looks sort of well distributed over the entire globe. [_URL_0_] So Russia doesn't actually have significantly more than anywhere else per unit surface area - but Russia being the largest country by area gives it a larger n... |
Why when driving do objects seem to move slower when seen from the windshield vs seen from a side window. | Perspective. When you're looking out the front window, you're looking at an object moving at less of a perpendicular angle in your field of vision than from the front. To visualize it a bit o o| |
What would it take for the UK to stay in the EU, and how likely is it? | There are really two facets to the answer, the legal one and the political one. Legally, all it would take currently is for the UK to revoke its notification under Article 50. It's not clear whether the Government currently has the power to do that under the European Union Act 2017 or if Parliament would need to pass a... |
How is it possible for 2 devices to communicate without wires?! Bluetooth, WiFi, telephone...?! | All the devices in question have the same thing in common: light. Or rather, electromagnetic radiation, since most light is invisible to humans. Basically, a device that wants to communicate with another device that is not connected to it by a metal wire has two devices: one that is basically a blinking light, and one ... |
If taking ibuprofen reduces your fever, but your body raises it's temperature to fight infection, does ibuprofen reduce your body's ability to fight infection? | It can, yes. However, the body's thermostat gets wonky during a fever, and it's entirely possible to get so hot that your body actually starts to hurt itself from its own heat more than the infection itself. At that point, taking ibuprofen might help. I'm not a doctor, though. Whenever you have a fever, it is always wi... |
How do you work out the combined probability of 2 events? (Presuming I know the probability of both) | Generally speaking, you multiply them as indicated in the other posts. However, this only holds for independent events. For example, let's assume that the sun is never out when it rains. If it rains 50% of the time, and the sun is not out 50% of the time, then the probability of it raining and the sun not being out is ... |
When two pieces of a broken bone begin to heal and bond back together, is the bond stiff, but brittle, or is it more like a glue, slowly getting thicker and stickier? | It depends on your bone health. It's not so much stronger as it is denser, this could mean stronger, but it could also become a structrual weak point. Depends on the break. As for the bond it should be more like it was welded, new bone regenerates and fuses, that or cracks fill in with new bone. |
If we can see cells with a microscope, why can’t we just keep adding lenses/magnification to see atoms fairly clearly (with electrons etc.)? | Light is made out of teeny tiny things called photons. We see things when photons bounce off of them and land on the retinas of our eyes. Photons are really really small, but there are lots of things in the universe that are even smaller, like atoms and electrons. When we try to look at these super-small things by boun... |
Is there any scientific basis for horoscopes? | What other people said, with the only addition that as it corresponds to a birth month, there's the POTENTIAL for shared environmental factors as a result of birth month. In a modern society where our diets are fairly standard year-round it's less prevalent, however it's possible that in the past things such as the ava... |
Why are we are all bothered by disclosure of App permissions on mobile phones but not by softwares on Windows by developors? | Because people take their phones with them everywhere they go. It has more intimate access to people's personal lives generally speaking, theres a lot of sensitive data exchanged. |
How was the exact value of pi ever determined? | One of my pet peeves is the idea that pi can't be defined exactly. It can. Pi has an exact, unambiguous value. There is and can be no disagreement as to what the value is. It's true that you can't write down all the digits of pi. It's also true that you can't write all of the digits of 1/3 — no matter how many digits y... |
If we can’t see atoms, electrons, quarks... How did we knew that matter is composed by those things and what it seemed like ? | You are right, in a way, we indeed don't know if matter is composed of those things. We can't see them like we see a tea spoon on a table. But then, why do we say that is the way it is? Well, that's a shorthand to say: if you assume matter is this way, I have this theory here that say LASER is possible, nuclear fission... |
Why do almost all FM radio frequencies have an odd decimal value? For example: 100.3, 91.5, 101.1 | The fact that they are 0.2 apart is because of the way radio works. It's like lines of text: you need to have the text be a certain size so you can read it. If you make it smaller, it's harder to read . You can put the lines closer together but if you get too close then it's hard to read. Ideally, the lines of text are... |
Why does breathing become more difficult once we start focusing on breathing? | There's the bit of the brain you talk to, and the bit of the brain you don't talk to. The second guy is the one who normally handles breathing. Sometimes breathing talks to the first guy. Then first guy talks to you like that drunk guy at the bar who will not SHUT UP about this fun girl they met five minutes ago on the... |
Why can’t we die just by holding our breath ? | Voluntarily holding your breath will eventually lower the oxygen content of arterial blood. Although breathing is normally regulated by blood CO2 levels, after prolonged, deliberate breath-holding that feeling of extreme urgency to breathe is due to hypoxia. Eventually you lose consciousness as the brain loses oxygen, ... |
Why don’t we wake ourselves up when we snore? | If it's bad, we do. The disturbance, and the interruption in breathing often do wake people up, or pull them out of deep sleep into one of the higher stages. It's called sleep apnea. |
Are we ABSOLUTELY sure or PRETTY sure that nothing can outspeed light? | As is the case with every theory, it's not 100% infallible. However, we do have VERY STRONG EXPERIMENTAL EVIDENCE that confirms this theory in multiple and diverse ways. It's always possible that some experimental data will contradict this theory, and the theory will need to be revised. Possible, but not very likely. |
how do scientist distinguish between correlation and causation on unethical studies? For example to determine the causation on cancerous substances when no ethnic commit would allow direct human trials | One way is to rule out other things that would explain the correlation. For instance, if I invent an arthritis drug and it seems like people who take my drug have a lot of hip fractures, I would need to sort out as many explanations as I can. People with arthritis tend to be old, and old people tend to have hip fractur... |
How is data sent to one cell phone, not all cell phones connected to the same tower | I'll try to make this as simple as possible. Your phone has a code waveform. This is unique to your phone. Signals are broadcast as another waveform. To recover the data, your phone multiplies the signals with the code waveform. The signal intended for you is the only waveform that isn't orthogonal to your code. The re... |
When a phone has no signal, how can it still make an emergency call? | Some GSM phones on some networks don't need a SIM card to make a 911 call. It might look like you have no network signal from your carrier, but some kind of signal does need to be able to get out and reach a tower. |
why is it necessary to shoe and maintain shoeing horses, but wild ones are fine? | Two elements here; wild ones don't walk on the hard road surfaces and other conditions created by human activity. In addition horses have evolved to live in relatively dry steppe conditions, when they live in the wetter climates the hoof becomes softer and can rot with all the water so needs protection, horses on the s... |
How do hatmakers turn cotton fabric into a semi-rigid, leather-like hat? | *From what I remember so possibly incorrect in details:* Fur-felt is extruded and dampened and then shrunk and dried into finished form . It's at that point quite a dense compacted material. Also from memory - hats can get weird if wet, almost positive non-synthetic modern hats are waterproofed/sprayed. I know there ar... |
why we cry when feeling intense emotions | I'm not a scientist and I'm hella late but I remember reading that humans learned to cry so they could express emotional distress before they had the ability to speak so they could get help and comfort if they needed it.Tears may be similar or identical in composition to cerebro-spinal fluid. Tears released due to emot... |
Does a joint's ability to be cracked say anything about the health of the joint? | I had my joints crack for years now, but 4-5 years ago I developed a rare bone disease & chronic joint + bone marrow inflammation. Is me cracking my joints left & right by just walking or standing fine when it doesn't cause pain? |
Why is it so satisfying to rub your eyes and why is it so difficult to stop? | Havent happened to me in quite a time. I think that irritants go into your eye when you rub them, and then your eye, being a delicate spot, believes that there's something in your eye, making you want to rub it again, and rewards you for doing it, where the good feeling comes, but simply more irritants from your hand g... |
How does a running start help you jump higher than normal? | When you run, you're building up kinetic energy. When you slow down and jump, that kinetic energy doesn't go away; conservation of momentum means that it gets redirected into your upward movement. |
Do Doctors really work "24 hour shifts" as is a whole day with only a few breaks, no sleep? If so, does this not make more susceptible to errors? | Fun fact: resident physicians in the US aren't allowed to work more than 80 hrs a week or for more than 24 hours due to the death of [Libby Zion]. After residency though there is no limit. |
When it comes to music(guitar) what are tabs and why are the looked down upon as a reference? | Tabs are a simple way to write music, made primarily for the guitar. It basically shows you where to put your fingers rather than what *notes* you should play It's looked down upon by snobs who think they are superior because they can read sheet music, basically. Don't care about what they say, feel free to use Tabs. T... |
Why did/do countries honor Switzerland’s neutrality in times of war? | Aside from the fact that every male citizen is required to serve some time in the army and they all get to keep their guns at home? There's little to be gained from physically overrunning the country that you couldn't get more easily by just trading with them. They're hilly ranging to mountainous, and one of the major ... |
Why only plants photosynthesize? | First there were very simple single-cell creates such as bacteria and the like. Plants evolved from these and via photosynthesis suddenly could capture a lot of energy from the Sun. They even poisoned the planet with oxygen which killed off most of their brothers and sisters who could not photosynthesize. Animals came ... |
If someone with memory issues takes a polygraph, would it be easier to lie? | Maybe? But it doesn't really matter because polygraph results are total BS anyway. Even the machine's inventer later came out against it for being horribly inaccurate. The fact that they are still used at all should be in the category as acupuncture, palm reading, and anti-vaxxers.Polygraphs dont detect lies. You may a... |
Why do companies forbid employees from talking about salaries/pay with each other? And why at some companies it’s even a fireable offense? | It makes it easier for companies to pay people different amounts for similar 'grade' jobs. For example, if I've worked somewhere for years and got good at the job, only to find the new guy I'm training up earns more than me I might start asking for more money, look for a new job elsewhere, or simply get resentful. Easi... |
Aside from having no major enemies, why does Canada not have a military as strong as the US? | Because there is an appropriate cost associated with size of armed forces. Canada's GDP could likely not sustain the immense cost of the US military. |
Why is there so much conflict in the Middle East? Why are other countries like the US involved? | The fundamental problem is that most of the Middle Eastern countries are 'natural autocracies'. Virtually the entire wealth of those nations rests in the geography rather than the people. As a result, those countries are controlled by narrow elites who control the natural elites - much to the detriment of the mass of p... |
How do services like 23 & me know who your ancestors are? Do they somehow have access to the DNA of people long dead? | Some bones dug up from ruins have had DNA samples taken , and [Egytpian DNA] from this). Some areas of the world have had enough isolation that their modern DNA is relatively unchanged . So the modern DNA is very similar to the ancient DNA for that area. And then there are people around the world who already know their... |
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 might help by thinking of an analogy with money: if financial transactions don't destroy money, just move it from one person to another, why does it matter how much anything costs? Think about why the one matters, and it might help with the other.It matters because our rate of consumption of water often exceeds the ... |
How can a game on Xbox/PSN freeze if its a digital download and doesn’t require a disc? | Literally the exact same way pc games freeze without it being disc-driven. These days discs really only act as a security check for DRMs: you don't need a disc to play an Xbox game, you only need it to be *allowed* to play it. It's fully installed as a digital game, with or without the disc |
How do animals (and humans) know what food is? | Because you gave it to him, and he probably saw you eating it too. And as you said, he put it in his mouth, like he puts everything in his mouth and if it tastes good, he'll chew and swallow. Animals have taste and smell to know what's food and what isnt. |
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. | The glow of red human eyes is a little like the glow of the moon. It's the reflected light of a far greater light source. The flash of a camera travels through the pupil and hits the back of the eye – the retina. The retina reflects the light back towards the camera, but it does so just a little differently than it cam... |
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? | 1. If they buy part of the company then they are a part owner. 2. If they just loan the money, then they are not a part owner. 3. It doesn't matter what country you live in. You can buy things in foreign countries, and people in other countries can buy things in your country. |
Why censoring the eyes (and not others parts of the face) in a persons picture is enough to make them unidentifiable? | Because we don't recognize faces as it is, we have mental shortcuts like how far apart are their features from one another. Lets call the key feature like eyes, nose, lips etc as a,b,c) By removing some parts of said ratios we have more difficulty in recognizing someone, that's why people disagree when 2 people are sai... |
Why do our bodies store excess fat, sugar, cholesterol etc but not water or vitamins? | Fat is super easy to store and can be a life saving energy source Water/vitamins are hard to store long term and, while important, don't give us energy that can be used for nearly any bodily function. |
Why is tickling usually uncomfortable, and why does it cause you to go into a laughing-seizure? | Notice how most people are most ticklish on their more vulnerable spots, feet, stomach, inner thigh etc. Evolutionarily it makes a ton of sense to feel the need to protect those areas and encourage friends to get you to practice protecting them . In alot of social animals it's more obvious that even though they are onl... |
Why do video games strain the GPU but high quality movies that literally look like real-life, do not? | A movie is just a series of pre-rendered 2D images. The GPU isn't really involved. A game is a 3D scene being rendered on the fly. |
What is the purpose of Netflix's "are you still watching?" feature? | Also, to save on data if the viewer happens to have slipped into a drunken coma whilst watching Netflix but doesn't have unlimited data. ", 'It started when Netflix first started offering streaming services. People wanted a way to start the next episode automatically. This worked well, but then people would fall asleep... |
How does HIV/Aids work, and why does it damage the immune system so severely? | Short answer is it uses one of the white blood cells as a host. Cutting out a large part of your body's emergency response system by sheer extinction will leave you much more vulnerable. Most diseases incubate for several days before symptomatic. Increasing that by a week can be catastrophic. |
What is the difference between "Frames Per Second" (FPS) and "Refresh Rate" (Hz)? | If you have a TV or monitor it could refresh at say 60hz so 60 times a second it refreshes the image with whatever the source tells it too, PC, DVD or Blu-ray etc. Frames per second is how many different images are being sent to the monitor or TV every second. The two do not have to be the same so in the example of a T... |
Why Are Wild Orca's and Dolphins So Chill Around Humans? | Wild one's have the ability, if they do so desire to defend themselves and could easily kill the people that get close to them in the wild. |
Why do projectiles move along with the Earth's rotation? | The cannon and the air and everything else are also moving at the same rotational speed. Just like how a ball you drop in an airplane doesn't rocket backwards at 500mph, the cannonball doesn't spontaneously lose that surface velocity if you fire it. If you fired in a north/south direction you *would* notice that the eq... |
Why India is the only place commonly called a subcontinent? | India is its own small tectonic plate. The only other landmass in a similar situation is the Arabian Peninsula. The Indian Plate is also colliding with the Eurasian Plate at fairly high speed and is actively creating the massive Himalayan mountain range that almost totally cuts the Indian Subcontinent off from the rest... |
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? | Many bacteria produce toxins that can make you sick. Boiling or cooking will kill the bacteria, but it doesn't do anything to the toxins.Usually fine. However, bacteria like clostridium botulinum produce some of the most lethal poisons known to man. |
why doesn’t Earth get hit with meteors like the moon? | It does. But many of the craters you see all over the Moon are aeons old. The Earth has active plate tectonics, and erosion from wind and water, so the old craters no longer exist. Plus a surface that is 70% water. Meteor impacts are less frequent today than when the Moon formed , so you don't see as many newer craters... |
Why aren't babies allowed to sleep on their side? | I honestly never understood it. Didn't help that they went and switched it up on me when I was having babies. With my daughter I was told to lay her on her tummy for the reasons you stated. Two years later I had my son and the rule was now 'back to sleep.' I lucked out. My daughter had laryngomalacia and projectile vom... |
Why fighting in Hockey is considered 'essential to the sport' | It's really easy to get away with dirty cheapshots in hockey. The idea is that fighting prevents this as an accountability mechanism. How well it works is always being debated. |
how can bugs fly inside moving vehicles? | The air inside a vehicle, technically speaking, does not move That means, the air moves at the same speed as the vehicle. *Mostly.* The only movement that will occur is due to inertia - or, something similar to water sloshing around in a bucket if it were in that same car. Or, y'know, air vents and such. & #x200B; As f... |
what animals with eyes on the sides of their head see exactly? Can they see both their sides at the same time? | Chameleon have similar vision to us. Their lens are concave while their cornea is more convex shaped giving them more 'pinhole/tunnel vision'. Yes, often one eye is kept on watching predators and prey near them while the opposite eye will continue to scan its surroundings for other dangers |
Why does gravity drops off so fast? | Zero gravity is another name for micro-gravity. Gravity exists everywhere in space. The more mass an object has the more it's affected by gravity. For astronauts, the further away they get from the earth the less the earth's gravity affects them. They are floating around in free fall, because nothing is pulling them to... |
Why do movies cost so much to make? Budgets are often in the millions. Is it the equipment? Paying the actors/crew? | On most movie sets you're paying for experts in whatever field they're in. whether it's carpentry for building sets or makeup artists or lighting directors. And you're also paying for speed. if you have a job to do on a movie set you have to be ready to do it fast at a moment's notice. And then there's also advertising... |
How does a blood test work? | There are two broad types of blood testing, blood chemistry and hematology. Your blood chemistry is the snap shot of all the stuff traveling around in your blood like glucose, fats, calcium etc. A side note there is a test for hemaglobin A1C that tells us how your blood sugar has been over the past 3 months. The other ... |
If an atom is mostly empty space, how are we able to touch anything, and how do atoms combine to make something solid? | You got some good answers here but those pop science channels on youtube have made videos on this exact question. Search for them if you're interested |
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? | For future reference, questions like this are better in r/askscience. Rule 2 forbids hypotheticals , but I'll leave this up. |
Why was cursive taught before the prevalence of typing in most workplaces? It's it supposed to be faster printed characters? | Wait, does it mean that in your country, you don't have to write in cursive? What fo you use when you hand write something? |
If adderall calms you down if you have ADHD, why does it make you go crazy if you don’t have ADHD? | The way I understand it: Adderall are stimulants; some people with ADD, if they're undiagnosed or untreated, self-medicate with caffeine or other drugs. The ADD person's brain is overactive, and reacts to stimulants like Adderall or caffeine differently: I could chug two cans of Rockstar energy drink and take a nap; I ... |
how does a viral infection turn into a bacterial infection? | If you have a viral infection and your immune system is lowered, then your body's ability to protect itself from common or not common bacteria is compromised. Your immune system gets too busy fighting off a viral infection to be effective against a bacteria that you touch, breathe in, or absorb. So, for example, you ha... |
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. | Your credit score is generated by the potential creditor based off of the criteria and weights that they have set with the company they pay to pull the credit report. Some places don't care about inquiries. Some places see them as a yellow flag indicating that they should proceed with caution. Maybe it means you decide... |
how come when you look at the sun or a star in space, you're looking back in time? | Imagine you're stood at the end of a football field from someone else. If they fire off a starting pistol, you'll see the puff of smoke, then an instant later you'll hear the bang. That's because sound travels more slowly than light does. You saw when the pistol was fired; you saw the flash. But you didn't hear it unti... |
How some sneakers have higher market value than bench-made bespoke shoes. | It's extremely difficult to compete price wise with good branding and marketing. A whole lot of the cost of things comes from the name attached to it and th me cost of advertising. Example, Jordans are fuctionally ok shoes at best, but they sell for as much as $100,000 because Michael Jordan's name is on them. |
Why do washing machines have their own concept of time? | There are 2 main causes; If the washer detects soap suds in the spin cycle it will go back to the rinse cycle. If the washer goes unbalanced while spinning, it'll add a bit of water, shake it around a bit to redistribute the load, then start the spin cycle over again. Source: I am an appliance repair technician", 'Chec... |
Why would automakers put a limited slip differential in a sports car over a locked differential or a positrac | First, a mudding car is not a sports car Mudding is generally done with vehicles like Jeep Wranglers, and its helpful to have a locked differential so you can get yourself out of a tricky spot where you only have 1 wheel on the ground But full time locked differentials suck, you can't go around corners at any reasonabl... |
how is it possible to sell items that are so cheap there should be no profit? | Sometimes shops don't make profit on certain items. That way you go there because you like the prices, but you're not just going to buy bananas, you're going to buy other products, which they sell for a profit. |
How does a currency become "stronger" or "weaker" with respect to other currencies? | There's plenty of different factors: * Inflation * Interest Rates * Trade deficit / surplus * Debt * Change of policies * Stability * Speculation ", 'Currency, like any commodity, have its price set by supply and demand. While most currency trades are conducted by brokers and speculators they do not have any supply or ... |
Why cant we imagine a new colour? | I've always wondered if everyone sees different colours because the brain might process colour differently with same wavelength, but we would never know. And if it would be possible to change how our brains process light so we could see entirely new colours on same spectrum, basically replacing the stuff we used to see... |
Why is it we can sometimes feel or hear our heart beating through various body parts, and what makes it happen as opposed to the majority of time where we can't? | I can feel my heart beat in my hands on occasion. Here's something weird for you. My hands go numb when I pee. EVERY TIME. 😅😞", 'I can hear my heart beating in my ears all the time. Especially when I lay down after moving around a lot. |
Why will some buisnesses not accept $50 and $100 bills? | Many places, especially overnight, have the cashiers put any $20 bills they receive through a slot into a vault that no one on the premises has access to until the next morning. That reduces employee theft, and makes the store is less enticing to robbers ? It doesn't do much to deter robberies if the robbers don't know... |
How do animals live without dental care their whole life when we humans cannot live without cleaning our teeth everyday? | Because they don't eat sugar, their teeth are adapted to their natural diet, adapted to their natural amount of wear , and the animals also simply don't live as long as they would if they had the advances in modern medicine and dental care we use. |
Why do manufacturers of vehicles need to sell to dealerships and not directly to consumers? (except Tesla who seems to be getting a lot of backlash?) | Just to add to whats already been stated, car manufacturers today are not really in the business of selling cars so much as they are selling the financing to purchase the item. The car/truck is a 'vehicle' to get you into a loan or financing through, ideally their own financial product offerings is the real product, no... |
Why is it inherently worse to eat a fast food burger than to cook one at home? | It's not. Fast food is no more unhealthy than if you made the same thing at home. It's just generally cheaper so people eat more. A McDouble is $1.50 and 380cals. Spend $3 and you're at nearly 800cals. |
Why is hunger satisfied almost instantly? | Because in today's western society no one really knows anymore what true hunger is. What you are experiencing is an appetite at most and best. Many of us are addicted to food, sugar and the products we consume every day, so we feel a constant need to eat something. But we really don't. As long as we got fat reserves, w... |
How does an IRA or Roth IRA make money? Is the broker using my money to invest then I'm just getting a cut of what they make? | They make money from the transaction fees when you make trades, lending your funds when they are not invested, ie. when they're sitting in a money market account waiting to be invested -- just like any other brokerage account. |
How do brands like Smartfood pop their popcorn so that it's so much fluffier than what I make at home? | I'm a mechanic for a healthy snacks manufacturer. The combination of hot air and kernel type are what achieve that fluff. We use an industrial hot air popper similar to [this]. The kernels travel through a large perforated rotating drum which cooks them for roughly 2 minutes at just under 500°F. |
If your skin is constantly replacing itself through cell division and replication, shouldn’t tattoos eventually just fade away? What makes them stay on your skin forever? | [On mobile so hope I link right] That's a smarter every day video where he explains how tattoos work. It's super informative and he breaks it down really well. |
Why is it possible in the US to convict someone for several consecutive life-sentences? | Because America doesn't believe in rehabilitation, only punishment. Studies have shown that the majority of violent offenders grow out of their aggression and violence later in life. Also an ex con is set so far behind when they are released that a lot of them choose to go back to prison for a free meal and housing. |
Is the alcohol in mouthwash the same type as found in wine and beer? | It's the same alcohol -- ethanol. It's in relatively similar concentrations. The old-school yellow-bottle formulation of Listerine is around 54 proof. So, not quite as strong as hard liquor but stronger than wine. You shouldn't drink recreationally though. The active ingredients -- the germ killing agents -- mean that ... |
Why is there no way to get feedback about why you didn’t get the job? | You know the people who interviewed you. It's okay to call them and ask them for an explanation, after assuring that the call is for self-improvement only and not for harassing. |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.