Why isn't the radio distorted while traveling in a car?

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• Why isn't the radio distorted while traveling in a car?
• Are there stars that radiate no visible light?
• I've heard that galaxies across the universe are moving away from us at faster than the speed of light. How is this so? I thought nothing can move faster than light.
• [Quantum Mechanics] How does the true randomness nature of quantum particles affect the macroscopic world ?
• What element/s were present just as the big bang was about to happen?
• Does time in geostationary satellites always run slower, and does special relativity ever still influence time in these satellites?
• When you delete something off a phone or computer, where does it actually go?
• What is the difference between "apparent power" and "real power?
• Does material that falls from space increase Earths gravitational pull?
• Why is visible light limited to such a small fraction of the electromagnetic spectrum?
• Do animals have meal times?
• How do cities without bodies of water/rivers nearby deal with sewage? Examples: Johannesburg, South Africa or Lodz, Poland.
• Why do unusually tall people (7' or above) tend to have medical issues such as heart problems and bone problems?
• Suppose you throw a coin an infinite amount of times. What are the chances that an infinite streak of heads is going to come up?
• Do different kinds of light travel it different speeds?
• What molecular signal initiates the physiological process of muscular hypertrophy?
• What are the four new elements and their functions?
• Why are the changes between states of matter binary? How come water is liquid at 0.1 degree Celcius, but suddenly turns to solid at 0 degree Celcius; why is there no intermediate state?
• [Mathematics] What is the practical value of prime numbers and uncovering their properties?
• how do wild animals remove porcupine quills?
• Is the graphical fidelity of games limited by computational power available currently or is it very difficult to make a realistic looking game?
• Does the nutritional makeup of a green banana change when it becomes ripe?
• Why are allergies far more common in developed countries?

Why isn't the radio distorted while traveling in a car? Posted: 11 Jun 2016 11:05 AM PDT What I mean is, why do radio waves sound the same regardless if you're moving or not? submitted by /u/Surely_not_Nate [link] [comments]

Are there stars that radiate no visible light? Posted: 11 Jun 2016 12:48 PM PDT Do such stars exist that they radiate maybe only ultraviolet parts of the spectrum because they are so hot, or vice versa? submitted by /u/Dirty497 [link] [comments]

I've heard that galaxies across the universe are moving away from us at faster than the speed of light. How is this so? I thought nothing can move faster than light. Posted: 11 Jun 2016 10:41 PM PDT submitted by /u/woodsey262 [link] [comments]

[Quantum Mechanics] How does the true randomness nature of quantum particles affect the macroscopic world ? Posted: 12 Jun 2016 02:17 AM PDT tl;dr How does the true randomness nature of quantum particles affect the macroscopic world? Example : If I toss a coin, I could predict the outcome if I knew all of the initial conditions of the tossing (force, air pressure etc) yet everything involves with this process is made of quantum particles, my hand tossing the coin, the coin itself, the air. So how does that work ? Context & Philosophy : I am reading and watching a lot of things about determinsm and free will at the moment and I thought that if I could find something truly random I would know for sure that the fate of the universe isn't "written". The only example I could find of true randomness was in quantum mechanics which I didn't like since it is known to be very very hard to grasp and understand. At that point my mindset was that the universe isn't pre-written (since there are true random things) its writing itself as time goes on, but I wasn't convinced that it affected us enough (or at all on the macro level) to make free plausible. submitted by /u/Drakkeur [link] [comments]

What element/s were present just as the big bang was about to happen? Posted: 11 Jun 2016 01:09 PM PDT Given that the universe is now 3/4 hydrogen but that heavier elements get fused in massive stellar objects, presumably the ultimate fusion environment was the moment before the big bang happened, or possibly in the first "split second". What element would therefore have sat at the core of it? submitted by /u/ItsIllak [link] [comments]

Does time in geostationary satellites always run slower, and does special relativity ever still influence time in these satellites? Posted: 11 Jun 2016 11:17 AM PDT Is it solely general relativity that influences time within geostationary satellites, that are stationary to an observer on the earth, or does special relativity play a part too? submitted by /u/Abbykiew [link] [comments]

When you delete something off a phone or computer, where does it actually go? Posted: 11 Jun 2016 08:08 AM PDT How can you put some data into a hardrive, then you can magically make it disappear for more room for data? submitted by /u/Ammar-The-Star [link] [comments]

What is the difference between "apparent power" and "real power? Posted: 11 Jun 2016 05:19 PM PDT I know that Volt-Amperes are different yet similar to Watts and I know when one is used over the other. But what is the actual difference? submitted by /u/roh8880 [link] [comments]

Does material that falls from space increase Earths gravitational pull? Posted: 11 Jun 2016 10:01 PM PDT I read that around 37000-78000 tons of material falls to Earth every year. Sense the Earth is 4.5+ billion years old, would all that material that falls to Earth every year increase earths gravitational pull? submitted by /u/Youre_A_Wizardqwert [link] [comments]

Why is visible light limited to such a small fraction of the electromagnetic spectrum? Posted: 12 Jun 2016 06:53 AM PDT Like the title asks, if the electromagnetic spectrum ranges with waves from picometers to thousands of kilometers long, why can we only see around the 1 μm band? I'm interested in this from a physics rather than biological perspective (though biological explanations would be welcomed), since most biological vision systems seem to work in this range. What special properties exist in this band that makes it so suitable for vision, which other frequencies/wavelengths do not share? submitted by /u/mehum [link] [comments]

Do animals have meal times? Posted: 11 Jun 2016 06:19 AM PDT Obviously wild animals are restricted by when they come up on food (and when the food is doing their easily huntable thing) and most domesticated animals are fed at interval by humans. I'm wondering if given an abundance of food do animals have a tendency to graze or do they seem to eat at the same time each day? I'd guess it would change by species but if others have more definitive answers, greater trends, or even answers about specific species I'd love to be informed about them. submitted by /u/colgaf [link] [comments]

How do cities without bodies of water/rivers nearby deal with sewage? Examples: Johannesburg, South Africa or Lodz, Poland. Posted: 11 Jun 2016 10:52 AM PDT submitted by /u/defeatedbird [link] [comments]

Why do unusually tall people (7' or above) tend to have medical issues such as heart problems and bone problems? Posted: 11 Jun 2016 10:05 AM PDT submitted by /u/PM_ME_ASIAN_PORN_ [link] [comments]

Suppose you throw a coin an infinite amount of times. What are the chances that an infinite streak of heads is going to come up? Posted: 11 Jun 2016 07:48 PM PDT My intuition says that it would be a 100% chance, but then, it would also mean there's also a 100% chance of an infinite streak of tails, and those two couldn't be both true at the same time... Could they? Would it actually be a 50/50 chance for both of them then? I really have no idea. submitted by /u/rafabulsing [link] [comments]

Do different kinds of light travel it different speeds? Posted: 11 Jun 2016 05:14 PM PDT You know, inferred, blacklight, etc. submitted by /u/MyNameIsBing [link] [comments]

What molecular signal initiates the physiological process of muscular hypertrophy? Posted: 11 Jun 2016 09:56 AM PDT As I understand it, muscular hypertrophy revolves around the concept of progressive overload and micro trauma: essentially, one damages the muscles by heavily exerting them and they repair themselves to handle a stronger load (thus increasing in size) and one must exert them more/with more weight to cause them to undergo growth instead. What signal is it that detects micro trauma and causes hypertrophy to occur, and what protein pathway cascades during the process of hypertrophy? In other words, what exactly is happening in a muscle at the molecular level when it grows? submitted by /u/Jnicky69 [link] [comments]

What are the four new elements and their functions? Posted: 11 Jun 2016 06:41 AM PDT Chemistry noob here. I read that Japan names one of the new found elements Nihonium. There are also Moscovium, Tennessine and Oganesson. What are their (potential) functions and how are new elements discovered? submitted by /u/korovasynthemesc [link] [comments]

Why are the changes between states of matter binary? How come water is liquid at 0.1 degree Celcius, but suddenly turns to solid at 0 degree Celcius; why is there no intermediate state? Posted: 12 Jun 2016 03:50 AM PDT It just seems too arbitrary to me. The molecules behave one way in this temperature, and suddenly they behave in a totally different way just by removing 0.1 centigrade. Why doesn't it, for example, turn into a thick paste which gets thicker and harder the colder it gets? submitted by /u/clickstation [link] [comments]

[Mathematics] What is the practical value of prime numbers and uncovering their properties? Posted: 11 Jun 2016 01:29 PM PDT submitted by /u/Palmsiepoo [link] [comments]

how do wild animals remove porcupine quills? Posted: 11 Jun 2016 11:31 PM PDT submitted by /u/jamjam89 [link] [comments]

Is the graphical fidelity of games limited by computational power available currently or is it very difficult to make a realistic looking game? Posted: 11 Jun 2016 11:35 AM PDT If the resources were available to run it, could a game that looks like real life be made? submitted by /u/thatCamelCaseTho [link] [comments]

Does the nutritional makeup of a green banana change when it becomes ripe? Posted: 11 Jun 2016 04:13 AM PDT After a banana becomes very ripe it looks, smells and tastes so different. Do the caloric, carbohydrate or nutritional amounts change at all? submitted by /u/steegie [link] [comments]

Why are allergies far more common in developed countries? Posted: 11 Jun 2016 03:02 AM PDT I've been to a lot of poorer countries and allergies there usually unheard of but otherwise extremely rare. I thought it could be due to lack of diagnoses but even where the healthcare systems are pretty good it's still extremely rare. I know the number of people who die of allergies in developed countries is extremely low but it seems there's far more people whose lives are affected by it. Do we know why this is the case? submitted by /u/ivandelapena [link] [comments]

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Does a person using a skateboard expend less energy than a walking person traveling the same distance?

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• Does a person using a skateboard expend less energy than a walking person traveling the same distance?
• Can liquid water exist on planets with extremely high gravity?
• Why does anxiety cause digestive issues?
• How was the number of atoms in a mole calculated?
• What did mathematician Ron Graham mean by saying that the number 2^120 is "beyond what computers can do; no computer can do 2^120 things right now" ?
• Is there any reason to rule out the possibility of multiple universes separated by distance?
• If time is sped up with gravity, then shouldn't the black hole that formed with our galaxy already have undergone Hawking radiation?
• How is parental DNA analysis performed?
• How do blood clots pass through the blood brain barrier?
• How do people with cerebral palsy and similar neurological disorders still retain neural plasticity?
• What method is better for survivability when jumping off a building? Landing with a mattress or landing on a mattress?
• Can ionizing radiation knock an electron out of one atom and into another?
• If I were to extrude a perfectly straight bar, would it go around the Earth or out to space?
• Is a carbon molecule C=C=C=C... possible?
• Can I get intoxicated by smelling alcohol?
• What happens to the DNA in transplanted organs?
• Can you harness the heat and friction from the brakes of a car to charge a battery in an electric car?
• Where is our solar system "going"?
• If I have a cup of coffee with cream, drink half the contents, refill it with only black coffee, and repeat infinitely, will there ever be zero cream in the cup?
• Why do some animals eyes glow when they look into a camera, but not people?
• Light Thrust?

Does a person using a skateboard expend less energy than a walking person traveling the same distance? Posted: 10 Jun 2016 07:01 PM PDT Yes, I know. Strange question. But I was watching a neighbor pass by my house on a skateboard today, and I started wondering about the physics of it. Obviously, he was moving between points A and B on his journey faster than he would be walking. But then again, he also has to occasionally use one foot to push against the ground several times to keep the momentum of the skateboard moving forward at a higher speed than if he was just walking. My question is basically is he ending up expending the SAME amount of total energy by the "pushing" of his one foot while using the skateboard as he would if he was just walking the same distance traveled using two feet? Assume all other things are equal, as in the ground being level in the comparison, etc. My intuition says there is no such thing as a "free energy lunch". That regardless of how he propels his body between two points, he would have to expend the same amount of energy regardless whether he was walking or occasionally pushing the skateboard with one foot. But I'm not sure about that right now. Are there any other factors involved that would change the energy requirement expended? Like the time vs distance traveled in each case? EDIT: I flaired the question as Physics, but it might be an Engineering question instead. submitted by /u/FalconAF [link] [comments]

Can liquid water exist on planets with extremely high gravity? Posted: 10 Jun 2016 07:11 PM PDT Can water exist in its liquid state on a planet like Jupiter, or does its extremely strong gravity compress it down somehow? I was thinking of this in the context of which exoplanets could host life, which as far as we know requires liquid water. Would the physical systems that make life on earth possible be able to function on a planet with extremely high gravity, or do they become too "smushed" down? submitted by /u/Eveverything [link] [comments]

Why does anxiety cause digestive issues? Posted: 10 Jun 2016 09:10 PM PDT submitted by /u/jjcoolpants53 [link] [comments]

How was the number of atoms in a mole calculated? Posted: 10 Jun 2016 10:02 PM PDT How was Avogadro's number discovered and measured? submitted by /u/Sword_and_Scholar [link] [comments]

What did mathematician Ron Graham mean by saying that the number 2^120 is "beyond what computers can do; no computer can do 2^120 things right now" ? Posted: 10 Jun 2016 05:06 PM PDT I've recently been reading about Graham's number and decided to watch a few YouTube videos. This one, with him explaining it, is what I'm referencing in the title. How do we measure the total power of computers? And how would we go about doing that at any given time? submitted by /u/shrugsnotdrugs [link] [comments]

Is there any reason to rule out the possibility of multiple universes separated by distance? Posted: 10 Jun 2016 06:52 PM PDT Similarly to how we have multiple galaxies separated by distance. Obviously, it's impossible to actually verify, but is there any reason to believe that there do not exist other universes some unknown distance away from the edge of our observable universe? I suppose, for the sake of discussion, I'm defining "universe" to be a physical grouping of galaxies similar to our own universe. submitted by /u/DFAnton [link] [comments]

If time is sped up with gravity, then shouldn't the black hole that formed with our galaxy already have undergone Hawking radiation? Posted: 11 Jun 2016 01:51 AM PDT From the perspective of the black hole, time farther away from it would seem like a stand still. Much like in the movie, "Interstellar" where one hour on the planet orbiting a black hole equals 7 Earth years. Now, I understand that it takes a very very very long time (10100 years) for a black hole to undergo Hawking Radiation, but shouldn't the relativity of time inside the event horizon be exponentially sped up compared to time experienced on Earth? Wouldn't this make it so that Sagittarius A* would have already gone through all those years through time dilation and no longer be there? submitted by /u/m2themichael [link] [comments]

How is parental DNA analysis performed? Posted: 10 Jun 2016 08:44 PM PDT I was explaining to a co-worker how DNA historical analysis is accurate for fathers but not for mothers of an individual. I have been lead to believe that it is the haploid sperm cell that carries the mitochondrial gene that is used for parental analysis. I was unable to clarify further than that, and I was wondering if I was incorrect or how I could further clarify my statement. Thank you. submitted by /u/Soulcraver [link] [comments]

How do blood clots pass through the blood brain barrier? Posted: 10 Jun 2016 09:42 PM PDT I thought that the blood brain barrier filters out large molecules. So wouldn't a clot be way large enough to be filtered out? Am I simplifying this too much or is there more to the brain blood barrier that I do not know. submitted by /u/michealcaine [link] [comments]

How do people with cerebral palsy and similar neurological disorders still retain neural plasticity? Posted: 10 Jun 2016 07:25 PM PDT submitted by /u/ebreedlove [link] [comments]

What method is better for survivability when jumping off a building? Landing with a mattress or landing on a mattress? Posted: 10 Jun 2016 08:44 PM PDT submitted by /u/TheMeisterman [link] [comments]

Can ionizing radiation knock an electron out of one atom and into another? Posted: 10 Jun 2016 09:11 PM PDT Can radiation expel an electron out of the 'orbit' of one atom and into another, and would this electron then become part of that atom? Could it potentially collide with a proton, and what would happen if it did? submitted by /u/Latexfrog [link] [comments]

If I were to extrude a perfectly straight bar, would it go around the Earth or out to space? Posted: 10 Jun 2016 11:57 AM PDT Let's propose we have a fantastical material that doesn't bend, stretch, compress, shear, whatever. I have a machine which if I were to point directly up, would extrude a continuous bar of material straight up. If I position it parallel to the ground, would the extruded bar wrap around the surface of the planet, as gravity warps space so as to be flat all the way around, or would it eventually leave the atmosphere due to the relative curvature of the Earth? submitted by /u/Dzugavili [link] [comments]

Is a carbon molecule C=C=C=C... possible? Posted: 11 Jun 2016 02:49 AM PDT I was reading about carbon nanotubes and graphene and thought that surely a single atom diameter strand of carbon would be even stronger. submitted by /u/sum_force [link] [comments]

Can I get intoxicated by smelling alcohol? Posted: 10 Jun 2016 04:55 PM PDT submitted by /u/TheRiotB34R [link] [comments]

What happens to the DNA in transplanted organs? Posted: 10 Jun 2016 11:21 AM PDT I understand that cells are replaced as they die and all tissues and organs are eventually entirely replaced. Does the amount of cells in the donor organ that has the DNA of the donor stay the same through the lifetime of the recipient? There must be some transition point between donor and recipient tissue, right? What happens at that point at a cellular level? submitted by /u/Tril0bite [link] [comments]

Can you harness the heat and friction from the brakes of a car to charge a battery in an electric car? Posted: 10 Jun 2016 04:35 PM PDT submitted by /u/Spamakin [link] [comments]

Where is our solar system "going"? Posted: 10 Jun 2016 12:44 PM PDT I have a few questions about our solar systems orbit; Our solar system is part of the Milky Way - what are we orbiting around exactly? Are we moving towards anything or is every objects distance and orbit constant? Will we come closer to other systems/stars/objects or even a chance we will ever run into other bodies? Will our orbit ever be affected by other stars or celestial objects? Will our orbit ever collapse? Are we moving through space like a frisbee or on an angle? Thanks in advance! submitted by /u/mysteryslice [link] [comments]

If I have a cup of coffee with cream, drink half the contents, refill it with only black coffee, and repeat infinitely, will there ever be zero cream in the cup? Posted: 10 Jun 2016 01:42 PM PDT Assume this is a homogenous solution. I drink the same amount each time and refill to the same level each time. I know the cream will eventually be a negligible amount but will it ever be gone completely? submitted by /u/DoctorScrambles [link] [comments]

Why do some animals eyes glow when they look into a camera, but not people? Posted: 10 Jun 2016 02:19 PM PDT submitted by /u/peachoftree [link] [comments]

Light Thrust? Posted: 10 Jun 2016 07:08 AM PDT This is my first question in AskScience so forgive me if its been asked before. My question pertains to the properties of light, particularly its very special property of always finding the shortest travel distance. Why does this happen ? Also, I was just pondering ideas about how no object can attain the speed of light. However, is it possible to use light itself as mechanism of thrust? Realistically this doesn't seem possible to me because light is somewhat mass less and am unsure if it would even produce a force. submitted by /u/0shocklink [link] [comments]

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What is mass?

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• What is mass?
• How much better equipped would we be today at rehabilitating the Red Zone at the eastern French border than in the 1920s?
• If you took a coil into space and spun a magnet inside it, will it ever stop spinning? Assuming you're a vacuum and zero gravity. Also, how much electricity would that produce?
• We know of an absolute zero, in which the speed of the molecules at this temperature reaches zero. Is it possible that there is an absolute max temperature, in which the speed of molecules is equal to the speed of light?
• I was watching Apollo 13 and they had a couple burns to help their momentum back to Earth and it got me curious. How does it work when spacecraft thrusts in a vacuum, I mean if there's nothing to thrust against how does it affect the momentum?
• Will the jets of Enceladus ever run dry?
• What determines what surfaces a given pen can write on?
• Why is alpha radiation more desctructive than gamma radiation although gamma radiation has more energy?
• Can computing help solve a thought experiment? Random Generation of the Mona Lisa
• At What Concentration Does Tetrachloroethylene Break Down Calcium in Plumbing?
• The Earth spins at roughly 1000 mph. A ball thrown in the air doesn't fall behind the Earth like a ball thrown from a moving vehicle. Is this because of the momentum at 1000 mph or does the Earth's gravity play a part?
• Should things disappear due to smell?
• When a charged particle accelerates under an applied electric field, what's 'pushing' it?
• Why is 0! = 1?
• If you had a large container that was filled with gas, and 2 perfectly stationary balls positioned near each other in it, if gravity didn't exist, would the pressure of the gas move these balls towards each other?
• What is the point of minus sign in Minkowski space?
• I have a magnet and I attach paperclips to it. Does the magnetic force stay constant? Is the force attracting the first paper clip the some strength as the force attracting the 100th?

What is mass? Posted: 10 Jun 2016 03:20 AM PDT And how is it different from energy? submitted by /u/hmpher [link] [comments]

How much better equipped would we be today at rehabilitating the Red Zone at the eastern French border than in the 1920s? Posted: 10 Jun 2016 05:32 AM PDT The Red zone in France is an area which was deemed unsuitable for human activities on account of the large amount of unexploded ordnance, heavily polluted soils and chemical weapons hidden throughout the land. The decision to set this land apart was taken right after WWI, and the criteria used to define this territory were based on late 1920s assessment of technology and capabilities. Reconsidering the Red Zone from the perspective of the technology and capabilities of 2016, how much better equipped would we be today at rehabilitating and decontaminating that land today compared to back in the 1920s? What would reclaiming this land and making safe for human activities entail? Would it be feasible, how long would it take, would it be worth the effort? submitted by /u/Gargatua13013 [link] [comments]

If you took a coil into space and spun a magnet inside it, will it ever stop spinning? Assuming you're a vacuum and zero gravity. Also, how much electricity would that produce? Posted: 09 Jun 2016 07:50 PM PDT Wouldn't this be an easy way to generate power for the space station? submitted by /u/panchugo [link] [comments]

We know of an absolute zero, in which the speed of the molecules at this temperature reaches zero. Is it possible that there is an absolute max temperature, in which the speed of molecules is equal to the speed of light? Posted: 09 Jun 2016 02:40 PM PDT submitted by /u/walleye275 [link] [comments]

I was watching Apollo 13 and they had a couple burns to help their momentum back to Earth and it got me curious. How does it work when spacecraft thrusts in a vacuum, I mean if there's nothing to thrust against how does it affect the momentum? Posted: 09 Jun 2016 11:13 PM PDT submitted by /u/Spuddups84 [link] [comments]

Will the jets of Enceladus ever run dry? Posted: 09 Jun 2016 10:50 PM PDT I was watching Space's Deepest Secrets and they talked about the moon Enceladus and the jets it has blasting water into space. My question is, why hasn't Enceladus run out of water? I don't normally post here so I apologize if this is a stupid question. http://www.nasa.gov/multimedia/imagegallery/image_feature_1856.html submitted by /u/ElectricBlueVelvet [link] [comments]

What determines what surfaces a given pen can write on? Posted: 09 Jun 2016 02:33 PM PDT submitted by /u/redditpirateroberts [link] [comments]

Why is alpha radiation more desctructive than gamma radiation although gamma radiation has more energy? Posted: 09 Jun 2016 11:26 AM PDT submitted by /u/glatteis [link] [comments]

Can computing help solve a thought experiment? Random Generation of the Mona Lisa Posted: 09 Jun 2016 06:13 PM PDT When I was 10ish (33 now) I was flicking through the channels and landed on a debate i'm not sure what the debate was about but the speaker at the time said something along the lines of "The odds of the universe being created without a God is less likely than a dump truck driving into a wall where the rubbish that hit the wall will recreates the Mona Lisa" This has stuck with me ever since, not that I believed what he said but me just wanting to know how possible, if possible at all will it be that a dump truck driving into a wall can re create the Mona Lisa. In a universe that's timeless and has trucks driving into walls every second surely there's at the least the possibility of a recreation. No doubt there aren't enough trucks on this earth and maybe not even enough time in the earths existence to have success with this experiment but what I am wondering is can computing help? A system I can think of could be something like this. •The software has a canvas, lets say 800 x 800 pixels •A script is then executed which assigns each pixel its own color •Once executed there the image will be saved in a location •The process repeats itself •A reverse lookup can then be used in attempts to find the Mona Lisa With the current computing power (how many saves a second is possible?) (how big of a HDD is needed for such an operation?) how likely is a result from such an experiment? submitted by /u/Furryfeet123 [link] [comments]

At What Concentration Does Tetrachloroethylene Break Down Calcium in Plumbing? Posted: 10 Jun 2016 12:45 AM PDT I'm referring to the Newmark Groundwater Contamination Site; Health Officers had found levels of lead in excess of 15ppb at two locations, but investigations were impaired when they were all but wiped out in the San Bernardino shooting. Does this substance make water inherently more corrosive to lead and solder? submitted by /u/Teachtaire [link] [comments]

The Earth spins at roughly 1000 mph. A ball thrown in the air doesn't fall behind the Earth like a ball thrown from a moving vehicle. Is this because of the momentum at 1000 mph or does the Earth's gravity play a part? Posted: 09 Jun 2016 02:49 PM PDT Also hypothetically, how would you stop an object so that the ground speed is 1000 mph faster? submitted by /u/Frigg-Off [link] [comments]

Should things disappear due to smell? Posted: 09 Jun 2016 02:38 PM PDT So smell is basically just small particles in the air right? Like when you smell bacon it's due to teeny particles of bacon in the air being picked up in your nose. So technically shouldn't things eventually just disappear due to smell? Or at least get smaller? If so how long would it take for a specific object to become noticeably smaller or be gone? submitted by /u/ponguinn [link] [comments]

When a charged particle accelerates under an applied electric field, what's 'pushing' it? Posted: 09 Jun 2016 04:50 PM PDT I'm confused as to how a field mediated by photons would impart a force on a charged object. For instance, why should a larger charge result in a larger resultant force? What's actually going on when the particle starts to accelerate under the influence of the field? submitted by /u/myallergies [link] [comments]

Why is 0! = 1? Posted: 09 Jun 2016 03:51 PM PDT submitted by /u/ozzric [link] [comments]

If you had a large container that was filled with gas, and 2 perfectly stationary balls positioned near each other in it, if gravity didn't exist, would the pressure of the gas move these balls towards each other? Posted: 09 Jun 2016 09:21 PM PDT As in, there is less gas between the balls than there is everywhere else, so would the balls move towards each other? submitted by /u/somerandomrubbish [link] [comments]

What is the point of minus sign in Minkowski space? Posted: 09 Jun 2016 03:09 PM PDT I am failing to understand the full usefulness of Minkowski's choice to give time a sign opposite of space (-+++ or +---) in his famous s2 = x2 + y2 = z2 – (ct)2 . The answers (other than: "that's just how it is") fall into two categories: 1) It's completely random, but convenient because it makes is easy to tell events which can no cause each other ("space-like separation") from ones that can ("time-like separation") by the sign of the answer. (Which is nice, but seems hardly a big deal) 2) Because it's consistent with reality by making the spacetime interval (S2) be invariable in all inertial frames. First of all, the two answers seems to be mutually exclusive. Second, answer #2 is not much of an answer unless you explain HOW it's consistent with reality whereas having same sign would not be. It seems to me that one can use a coordinate system with all same-signs for time and space that also has the spacetime interval be invariant. If we were to draw an X & T two dimensional chart where both axes have positive values, then a shifting of frames would rotate simply rotate both axes by same degree keeping them 90deg to each other instead of moving them toward each other. Frameshift image Looking at using good-old Pythagoras theorem, one would write X2 + (CT)2 = S2 But X'2 + (CT')2 also equals S2. I.e. - X'2 + (CT')2 = X2 + (CT)2 = S2 Meaning S2 is still showing to be invariable and without the use of any minus signs. So why add all the awkwardness of negative CT? submitted by /u/alikp [link] [comments]

I have a magnet and I attach paperclips to it. Does the magnetic force stay constant? Is the force attracting the first paper clip the some strength as the force attracting the 100th? Posted: 09 Jun 2016 09:07 PM PDT Assuming each paper clip is contacting the magnet with equal surface area submitted by /u/swill128 [link] [comments]

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