What happens when an electron and a proton are stationary in a vacuum and are 1m apart?

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• What happens when an electron and a proton are stationary in a vacuum and are 1m apart?
• Can physicists capture a gluon particle on its own, or even collect a pure sample of gluons, and would it be massless?
• Do quantum mechanical effects have any physiological consequences for how our brains work?
• If substance A has a freezing point below the freezing point of substance B, does that necessarily mean substance A will have a lower boiling point as well? If not, what are some examples?
• How do I explain this acceleration anomaly?
• [Psychology] Why do reading and writing skills excel first when we learn a new language at a later age yet children learn to listen and speak before reading and writing?
• Are there any known "comorbidities" for human sexuality? Not in terms of orientation, but do people with a low sex drive, for example, have any other differences compared to those with a high sex drive?
• How do we synthesize particular DNA?
• In terms of entropy, why is the big bang different from heat death?
• Is a black hole's event horizon formed instantly or does it take time to radiate from the singularity?
• What does the Wronskian have to do with the quotient rule?
• What do the data storage properties of nucleic acids mean for trans-binary computing?
• Would it be possible to put a satellite in joint orbit around the Earth and the moon in a figure 8 pattern?
• What would prompt an electron to make a downwards transition?
• Is there any evidence showing that longer ads are more effective than shorter ones?
• Largest theoretically possible wind turbine?
• Can "talking birds" like parrots actually talk?
• Did ancient civilizations each develop their counting systems in base 10 independently, or was that an idea that spread with trade? Is there any record of human civilizations that didn't use base 10?
• How do cheerios lower cholesterol?
• Is the gravity of Ceres strong enough to allow for walking or running?
• Does breastfeeding delay menopause?
• If a non-condensable gas cannot become liquid, does this still hold true if it is in a mixture?

What happens when an electron and a proton are stationary in a vacuum and are 1m apart? Posted: 03 Mar 2017 02:47 AM PST There are no EM fields other then that produced by the particles themselves. Obviously they will attract, but will they collide and emit photons? Will they spiral down until the electron is bound? Can you even conduct this experiment (Heisenberg uncertainty)? submitted by /u/Jqerty [link] [comments]

Can physicists capture a gluon particle on its own, or even collect a pure sample of gluons, and would it be massless? Posted: 03 Mar 2017 05:45 AM PST submitted by /u/break_main [link] [comments]

Do quantum mechanical effects have any physiological consequences for how our brains work? Posted: 03 Mar 2017 07:34 AM PST submitted by /u/aamfs94 [link] [comments]

If substance A has a freezing point below the freezing point of substance B, does that necessarily mean substance A will have a lower boiling point as well? If not, what are some examples? Posted: 02 Mar 2017 05:06 PM PST submitted by /u/MrCopprHead [link] [comments]

How do I explain this acceleration anomaly? Posted: 03 Mar 2017 03:03 AM PST For a class investigation we were required to set up a makeshift ramp and barrier, then roll an open toy truck carrying a figurine down the ramp. We logged the data and everything seems in order however, on the software generated acceleration - time graph, I have something that I can't explain. The graph begins as expected, the acceleration increases once the truck is released, but, as time goes on, the acceleration slowly decreases before it goes negative when the truck hits the barrier. I theorized that this was due to the truck approaching its max velocity, but the truck couldn't reach terminal velocity on our ramp, not only because of its length but the fact that friction and the ramp's normal force was at play. I just need help understand why the acceleration would seemingly decrease for no good reason as it rolled down the ramp. submitted by /u/afisc123 [link] [comments]

[Psychology] Why do reading and writing skills excel first when we learn a new language at a later age yet children learn to listen and speak before reading and writing? Posted: 03 Mar 2017 04:46 AM PST I've been trying to learn spanish and can write a lot better than I can speak or listen, or even read. Yet when I learned English, I learned first how to listen, comprehend, and speak. submitted by /u/hankikanto [link] [comments]

Are there any known "comorbidities" for human sexuality? Not in terms of orientation, but do people with a low sex drive, for example, have any other differences compared to those with a high sex drive? Posted: 02 Mar 2017 01:46 PM PST submitted by /u/ThiZ [link] [comments]

How do we synthesize particular DNA? Posted: 02 Mar 2017 04:52 PM PST To explain what I mean, I am referencing this post. https://www.researchgate.net/blog/post/dna-could-be-the-future-of-data-storage It was talked about how the researchers synthesized DNA with the exact order of bases and number of bases they needed for their information (e.g. they needed to map data as GAATC and so they synthesized it exactly as so). What I'm wondering is, how is this possible? How can we synthesize exactly the DNA we want, especially one that is 200 bases long. Thanks! submitted by /u/yty90 [link] [comments]

In terms of entropy, why is the big bang different from heat death? Posted: 02 Mar 2017 07:02 PM PST I understand both are states where the universe is homogenous and energy is spread evenly. submitted by /u/onceiknew [link] [comments]

Is a black hole's event horizon formed instantly or does it take time to radiate from the singularity? Posted: 02 Mar 2017 12:52 PM PST edit Also would this be a physics or astronomy question? submitted by /u/mrpigpuncher [link] [comments]

What does the Wronskian have to do with the quotient rule? Posted: 02 Mar 2017 06:12 PM PST The determinant looks to be in the same form as the numerator of the formula for the quotient rule; I was wondering if there were any connections. submitted by /u/AbramowitzHolmberg [link] [comments]

What do the data storage properties of nucleic acids mean for trans-binary computing? Posted: 02 Mar 2017 04:31 PM PST Given the successful harnessing of DNA's information-storing properties and the fact that each "bit" (base-pair) of DNA can be one of 4 values (A, T, G, and C), DNA could theoretically be used as a storage medium for a quaternary computing system. Obviously, such a system would also need a processor capable of computing base-4 numbers, not to mention the multitude of other hardware and software components that are required to assemble a functional computer. Is there any research currently being done into trans-binary computing systems? Does the successful demonstration of DNA as a storage medium bring us any closer to actually developing such a system? What would be the pros and cons of such a system over conventional binary computers? Higher-order nucleic acid storage systems could be devised by including uracil (U) or even by engineering entirely new nucleobases from scratch. Would there any additional benefits of having further higher and higher order systems? My intuition tells me that systems of base-8, 16, 32, 64, etc. may have some compatibility with existing binary systems, and base-10 computers capable of storing and processing information in decimal may be more intuitive for humans to interact with. submitted by /u/EpicHoosier [link] [comments]

Would it be possible to put a satellite in joint orbit around the Earth and the moon in a figure 8 pattern? Posted: 02 Mar 2017 09:09 AM PST And has it been done? submitted by /u/twiceblessedman [link] [comments]

What would prompt an electron to make a downwards transition? Posted: 02 Mar 2017 02:44 PM PST submitted by /u/lycanthh [link] [comments]

Is there any evidence showing that longer ads are more effective than shorter ones? Posted: 02 Mar 2017 03:53 PM PST I think poorly of companies with long ads and appreciate when an ad is short and concise.Is there any evidence showing that longer ads are more effective? submitted by /u/jetrii [link] [comments]

Largest theoretically possible wind turbine? Posted: 02 Mar 2017 02:42 PM PST I was wondering what would the size be of the largest theoretically possible wind turbine and how much power would it generate. Also if cost wasn't an issue what would the largest realistically possible wind turbine be with current materials(With normal materials or perhaps in a crazy scenario if say it was possible to build it from carbon nanotubes or somesuch) and again how much power would it generate. Thanks~! submitted by /u/darklywhite [link] [comments]

Can "talking birds" like parrots actually talk? Posted: 02 Mar 2017 11:10 AM PST My understanding is that they only repeat sounds and phrases. Though I occasionally hear people debate it, they generally cite personal experiences as their only evidence. submitted by /u/zachpledger [link] [comments]

Did ancient civilizations each develop their counting systems in base 10 independently, or was that an idea that spread with trade? Is there any record of human civilizations that didn't use base 10? Posted: 02 Mar 2017 11:42 AM PST submitted by /u/FR4UDUL3NT [link] [comments]

How do cheerios lower cholesterol? Posted: 02 Mar 2017 08:04 AM PST Cheerios claim to lower cholesterol. They're not lipids, so they would dissolve in blood. How would they "push" cholesterol out of arteries? Or is their claim just false? submitted by /u/noahcal11 [link] [comments]

Is the gravity of Ceres strong enough to allow for walking or running? Posted: 02 Mar 2017 09:17 AM PST Given Ceres' extremely low mass, would it feel more like Zero-G, or would the gravity "keep you grounded", so to speak? submitted by /u/Tendy777 [link] [comments]

Does breastfeeding delay menopause? Posted: 02 Mar 2017 12:14 PM PST Pregnant and breastfeeding women don't get periods, which means during pregnancy and breastfeeding follicles are not released, which means the more time a woman spends being pregnant and breastfeeding the more follicles are left. Does it mean she will get a menopause later in life? submitted by /u/amantonio [link] [comments]

If a non-condensable gas cannot become liquid, does this still hold true if it is in a mixture? Posted: 02 Mar 2017 01:01 PM PST For example, oxygen above -118.6C. Thanks. submitted by /u/banterousbanana [link] [comments]

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What would be the implications if the existence of a magnetic monopole was found?

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• What would be the implications if the existence of a magnetic monopole was found?
• When a star collapses to a neutron star it's said that the electrons crash into the nuclei, specifically into the protons, to form neutrons, so do they combine with an up quark to for a down quark or how do I have to imagine this process?
• The all-green picture with "red" strawberries picture. Do I see red because I know ripe strawberries are red?
• Would stars be visible from the daylit side of Ganymede?
• How can the electromagnetic and weak interactions be unified, if they have different gauge bosons?
• How can photons not have mass?
• Why did it take so much longer to discover the Higgs boson compared to other fundamental particles in the Standard Model?
• Why can carbon form four covalent bonds when the 2s orbital is paired up leaving only 2 solo electrons in the 2p Orbital?
• What are some practical applications of pulsars?
• Why doesn't FTL quantum tunneling violate causality?
• Are some people more psychologically prone to developing a phobia or PTSD?
• Although past menopause women no longer release eggs, are their wombs still capable of rearing babies?
• If the ozone layer was obliterated by a gamma radiation burst, how long would it take to return to normal levels?
• How does the adaptive immune system fight off new variants of pathogens, if there're no existing B or T cells with antigen receptors that can detect them?
• How does an internet server know at what speed to transmit you data?
• If we forget everything, what do we remember?
• Could you electrically charge mercury and place it in a insulated water gun then shoot someone and electrocute them?
• Can erbium be used to stop a nuclear reaction?
• Why isn't there a ciritical point on the solid-liquid phase boundary?
• How does a GPS calculate the shortest distance between destinations so fast?
• Is it possible to see a Mars Exploration Rover moving around on Mars from Earth? Is there any footage of this?
• Can I take a protein sample (for DNA Extraction/ PCR) without killing the fish?

What would be the implications if the existence of a magnetic monopole was found? Posted: 01 Mar 2017 11:27 AM PST I know from university physics that thus far magnetic poles have only been found to exist in pairs (i.e. North and South poles), yet the search for isolated magnetic pole exists. If this were to be found, how would it change theoretical physics? submitted by /u/thenumnum1429 [link] [comments]

When a star collapses to a neutron star it's said that the electrons crash into the nuclei, specifically into the protons, to form neutrons, so do they combine with an up quark to for a down quark or how do I have to imagine this process? Posted: 02 Mar 2017 06:53 AM PST submitted by /u/Maarico [link] [comments]

The all-green picture with "red" strawberries picture. Do I see red because I know ripe strawberries are red? Posted: 02 Mar 2017 07:42 AM PST This picture seems to be popular this week: https://i.redditmedia.com/BU23cX5feW7AjHZKnS69Dio9QWDurnRb6A3vx9XZojo.png?w=1024&s=c99d09cef7f72ae2f40c3ae63fd1e53c If you were to ask someone who has never seen strawberries before, would they still say they look red? (i.e: am I "seeing" red because I know strawberries are red?) submitted by /u/might_be_a_troll [link] [comments]

Would stars be visible from the daylit side of Ganymede? Posted: 02 Mar 2017 02:38 AM PST I just got finished watching the most recent episode of "The Expanse" and part of the action takes place on the surface of Ganymede. As the camera follows the action, in the background you can see the stars above the horizon, but it's pretty clear that the action is taking place during the day. My question is, is daylight dim enough on Ganymede so that the stars would still be naked-eye visible? or is it still bright enough like our own moon where adjusting cameras to image the surface (and presumably our own eyes) renders the stars invisible? submitted by /u/millijuna [link] [comments]

How can the electromagnetic and weak interactions be unified, if they have different gauge bosons? Posted: 02 Mar 2017 12:01 AM PST The electromagnetic interaction is carried by photons, while the weak interaction is carried by W and Z bosons. How can it then be that these two forces are in fact the same force, the electroweak interaction? submitted by /u/marcelgs [link] [comments]

How can photons not have mass? Posted: 01 Mar 2017 11:02 PM PST I thought that everything in the universe had mass in some form or another. So why is it that photons don't have mass? submitted by /u/Baxtrus [link] [comments]

Why did it take so much longer to discover the Higgs boson compared to other fundamental particles in the Standard Model? Posted: 01 Mar 2017 09:18 PM PST I have high-school level knowledge of basic particle physics, and I think I know that the Higgs boson's interactions with particles more or less "give them mass," but I know that's an overly simplified explanation and that the exact interaction is probably way more complicated. submitted by /u/whitenedblink [link] [comments]

Why can carbon form four covalent bonds when the 2s orbital is paired up leaving only 2 solo electrons in the 2p Orbital? Posted: 01 Mar 2017 09:14 PM PST submitted by /u/kai__nen [link] [comments]

What are some practical applications of pulsars? Posted: 02 Mar 2017 12:16 AM PST submitted by /u/blesingri [link] [comments]

Why doesn't FTL quantum tunneling violate causality? Posted: 01 Mar 2017 08:39 AM PST It seems that a bunch of experiments confirmed that particles tunnel through barriers faster than what would be expected if they were traveling normally at the speed of light. I'm referring to a study specifically by the Keller group in 2008 but this seems to be the consensus today (according to Wikipedia at least). I'm not ready to believe that relativity would fail so quickly and I'm inclined to think that even if FTL tunneling is possible, it wouldn't allow FTL communication. But I fail to see how that's the case. edit: corrected group name to 'Keller group' submitted by /u/zeitouni [link] [comments]

Are some people more psychologically prone to developing a phobia or PTSD? Posted: 02 Mar 2017 02:02 AM PST I'm wondering if any environmental or genetic factors are known to influence the likelihood that someone will develop a phobia or PTSD? There have been instances in my life that where others may have developed a phobia or anxiety, I developed none. Examples: Attacked by a violent dog. Required stitches, left a scar where hair won't grow. Yet I have no fear of dogs in fact I love them. Nearly drowned in the ocean and only survived because somebody noticed me struggling and pulled me out. Left me with a respect for the ocean but no phobia. Was attacked by an intruder in the middle of the night, leaving me black and blue, but I have no trauma/anxiety from this. Others I have spoken to who experienced the same things have told me they developed a phobia or PTSD for which they sought therapy. submitted by /u/MyRandomQuestions [link] [comments]

Although past menopause women no longer release eggs, are their wombs still capable of rearing babies? Posted: 01 Mar 2017 01:34 PM PST I mean, if you give them the right hormones to create the endometrium and other things, then deposit the baby in, couldn't they technically still carry the baby full term? submitted by /u/TheCaptainCog [link] [comments]

If the ozone layer was obliterated by a gamma radiation burst, how long would it take to return to normal levels? Posted: 01 Mar 2017 04:22 PM PST Would any plant or animal species be capable of adapting to something like that? submitted by /u/sericatus [link] [comments]

How does the adaptive immune system fight off new variants of pathogens, if there're no existing B or T cells with antigen receptors that can detect them? Posted: 01 Mar 2017 12:42 PM PST submitted by /u/Amerphose [link] [comments]

How does an internet server know at what speed to transmit you data? Posted: 01 Mar 2017 10:40 AM PST Chances are your internet connection is much slower than any server's where you're downloading stuff from. So what happens if the server "floods" you by trying to send data at a faster speed than you can download? Is that extra data lost and resent? Is it stored somewhere? Or does the server 'test' your internet connection and then sends data at a slower rate? submitted by /u/giu989 [link] [comments]

If we forget everything, what do we remember? Posted: 01 Mar 2017 03:49 PM PST This might not be accurate, but in movies and TV shows, you sometimes see a character forgetting "everything," yet saying they "don't know who [they] are." If we purportedly forget everything, then how can we still recall the idea of identity? submitted by /u/krismjenner [link] [comments]

Could you electrically charge mercury and place it in a insulated water gun then shoot someone and electrocute them? Posted: 01 Mar 2017 03:22 PM PST I asked my high school teacher and looked this up as it popped into my mind during class but was left empty handed. Thanks for any insight you can share on this! submitted by /u/ImBetterAFK [link] [comments]

Can erbium be used to stop a nuclear reaction? Posted: 01 Mar 2017 07:23 AM PST I saw on periodicvideos that erbium is a nuclear poison. It was described as killing any nuclear fission dead. If that is true, at what scale can it do this. Is it possible to produce a sort of safety kill switch for nuclear reactors? Or is the amount of erbium required just too massive? Or is there a reaction that makes this unfeasible? I had never heard of a nuclear poison before. submitted by /u/MrZerbit [link] [comments]

Why isn't there a ciritical point on the solid-liquid phase boundary? Posted: 01 Mar 2017 07:11 AM PST On the liquid-gas phase boundary of pure substance there is a critical point above which the liquid phase and the gas phase become indistinguishable. Why doesn't the same happen on the solid-liquid or solid-supercritical fluid phase boundary? I remember this being a possible question in the oral exam for one of my practical courses in physical chemistry. In preparation for the exam my lab partner and I asked dozens of other students and phd students. No one was able to give a satisfying answer. Luckily we weren't asked in the exam, but afterwards we went on and aksed the prof on that subject. His answer was that the phase change solid-liquid is mainly determined by a change of order in the substance. In contrast to that the liquid-gas phase change is determined by the change in interaction of the particles and overcoming of the attracting forces. I found that to be a pretty disappointing, undetailed answer. submitted by /u/N3uroi [link] [comments]

How does a GPS calculate the shortest distance between destinations so fast? Posted: 01 Mar 2017 02:36 PM PST Maps have a subtle depth to them where each intersection has its own rules like no right turns, and certain roads only go in one direction. How did they go about writing an algorithm that takes all of this into account? submitted by /u/joev714 [link] [comments]

Is it possible to see a Mars Exploration Rover moving around on Mars from Earth? Is there any footage of this? Posted: 01 Mar 2017 12:50 PM PST submitted by /u/pplwearsocks [link] [comments]

Can I take a protein sample (for DNA Extraction/ PCR) without killing the fish? Posted: 01 Mar 2017 10:50 AM PST Using this kit to catalog the genetic barcodes of trout from various lakes and I wanted to avoid having to kill a bunch of fish. Thanks! submitted by /u/Intimatepandas [link] [comments]

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Is there any culture (current or past) that doesn't honor their dead?

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• Is there any culture (current or past) that doesn't honor their dead?
• How does our bodies deal with pollutants in air? And how does micro dust particles effect our bodies?
• Why aren't solar panels mounted on wind turbine towers?
• How does the Doppler shift of light waves affect the photoelectric effect in metals?
• Why does gallium make aluminum brittle and does this phenomenon occur in other materials?
• Ask Anything Wednesday - Economics, Political Science, Linguistics, Anthropology
• Is there a theoretical maximum for how fast a propeller can turn in water, yet still be effective?
• Does the photon sphere around a black hole actually contain a significant number of photons? Or do they all decay into unstable orbits?
• Why does Pythagorean's theorem work?
• How deep could a human go under water and still use a snorkle?
• Does the higgsfield interfere with the conservation of momentum on massive objects?
• Is there a mechanism for gross movement of electrons or atoms to raise the energy levels of bound electrons?
• Why were there no alternative interpretations of Rutherford Gold Foil Experiment?
• If fusion requires energy and releases even more energy, would the fusion products require energy to separate or would they naturally decay? [physics]
• Electron is accelerated in electric field: How are excess energy and momentum accounted for?
• An object falling at terminal velocity is accelerated. The force stops. Does the object slow and return to its terminal velocity and of so, what force is causing this deceleration?
• Why is alcohol so associated with male violence when it is supposed to lower testosterone?
• If a free proton and electron combined to produce a Hydrogen atom, is it formed in its excited state?
• What would a collision between a star and a planet look like?
• What would be the "reaction" to gravity's "action"?
• Are there infinetly many prime numbers?
• [Mathematics] Does any succesive application of roots have a limit?
• Are there any fluids that can exist in a vacuum?

Is there any culture (current or past) that doesn't honor their dead? Posted: 28 Feb 2017 09:18 PM PST submitted by /u/zhang__ [link] [comments]

How does our bodies deal with pollutants in air? And how does micro dust particles effect our bodies? Posted: 28 Feb 2017 09:50 PM PST submitted by /u/the_fat_engineer [link] [comments]

Why aren't solar panels mounted on wind turbine towers? Posted: 28 Feb 2017 09:14 PM PST My thoughts so far: A 3 MW wind turbine tower (ca. 5.000 kWh / year) is 100 m tall and about 5 m wide. It should be possible to mount about 500 m2 facing east to west with a 45° mounting angle to produce roughly 50 kWh / year in northern Germany (where I am) up to 100 kWh / year in Texas (I used an online calculator and tried to maximize output by changing locations). So only 1% - 2% solar in comparison to wind. Pros no extra land needed very little shadows on the panels electrical installations are mostly (?) already in place low installation cost, as the towers are produced en masse and in factorys slightly higher grid stability (when the wind blows and it's overcast / when the sky is clear and it's calm) (also solar should be able to produce at least more than the 1 - 2% of wind stated above, since thats per annum and in reality solar produces power only half of the day -> 2 - 4% ?) cons vertically mounting solar panels reduces efficancy by roughly 35% (but panels could be mounted at an angle) maintenance difficulty due to hight wind puts high stresses on panels submitted by /u/ryebow [link] [comments]

How does the Doppler shift of light waves affect the photoelectric effect in metals? Posted: 01 Mar 2017 06:11 AM PST I had this thought today: suppose we positioned a light source and metal surface in space facing each other - the light has a frequency below that of the threshold frequency of the metal. If we were to cause relative motion between the two (for e.g. Moving the source towards the metal at a high speed) so that the light was blue shifted such that its frequency exceeded the threshold frequency, would the photoelectric effect now be observed? submitted by /u/axxenmardok [link] [comments]

Why does gallium make aluminum brittle and does this phenomenon occur in other materials? Posted: 28 Feb 2017 08:07 PM PST When the liquid metal, gallium is poured on aluminum, it somehow binds with the aluminum and makes it incredibly brittle. I'm talking like saltine crackers brittle. Why does this happen and is aluminum vs gallium the only instance of this phenomenon? submitted by /u/Fireheart318s_Reddit [link] [comments]

Ask Anything Wednesday - Economics, Political Science, Linguistics, Anthropology Posted: 01 Mar 2017 07:05 AM PST Welcome to our weekly feature, Ask Anything Wednesday - this week we are focusing on Economics, Political Science, Linguistics, Anthropology Do you have a question within these topics you weren't sure was worth submitting? Is something a bit too speculative for a typical /r/AskScience post? No question is too big or small for AAW. In this thread you can ask any science-related question! Things like: "What would happen if...", "How will the future...", "If all the rules for 'X' were different...", "Why does my...". Asking Questions: Please post your question as a top-level response to this, and our team of panellists will be here to answer and discuss your questions. The other topic areas will appear in future Ask Anything Wednesdays, so if you have other questions not covered by this weeks theme please either hold on to it until those topics come around, or go and post over in our sister subreddit /r/AskScienceDiscussion , where every day is Ask Anything Wednesday! Off-theme questions in this post will be removed to try and keep the thread a manageable size for both our readers and panellists. Answering Questions: Please only answer a posted question if you are an expert in the field. The full guidelines for posting responses in AskScience can be found here. In short, this is a moderated subreddit, and responses which do not meet our quality guidelines will be removed. Remember, peer reviewed sources are always appreciated, and anecdotes are absolutely not appropriate. In general if your answer begins with 'I think', or 'I've heard', then it's not suitable for /r/AskScience. If you would like to become a member of the AskScience panel, please refer to the information provided here. Past AskAnythingWednesday posts can be found here. Ask away! submitted by /u/AutoModerator [link] [comments]

Is there a theoretical maximum for how fast a propeller can turn in water, yet still be effective? Posted: 28 Feb 2017 06:33 PM PST If a propeller were rotating under water, at some point would the RPM be so great that it moves more quickly than the water can fill the "gap" behind it? Or perhaps, is there some kind of theoretical upper limit as to how much force can be generated from the RPM of the propeller? Or, is there some speed at which the kinetic energy produced by the propeller boils the water, possibly causing any loss of effectiveness? (if that's even possible). I would be really interested in learning about the fluid dynamics that are going on here. submitted by /u/Kenny_log_n_s [link] [comments]

Does the photon sphere around a black hole actually contain a significant number of photons? Or do they all decay into unstable orbits? Posted: 28 Feb 2017 06:23 PM PST I'm not sure if I'm misunderstanding the concept here but photons can exist in a 'straight' spacetime path at 1.5 times the Schwarzschild radius? But if on one side of the black hole there is slightly more particles than on the other then wouldn't they warp the Schwarzschild radius at that specific point enough so that the photons in the photon sphere would require a slightly different energy to stay in orbit? Does the photon sphere actually exist? Maybe I'm misunderstanding the math but wouldn't it be extremely easy to disrupt the orbit? submitted by /u/Lost4468 [link] [comments]

Why does Pythagorean's theorem work? Posted: 28 Feb 2017 03:37 PM PST Is there a way to intuitively understand why a2 + b2 = c2? I've known this formula most of my life and never understood how it works out. submitted by /u/SoulOfAMachine [link] [comments]

How deep could a human go under water and still use a snorkle? Posted: 28 Feb 2017 07:45 PM PST At what point does the air pressure exceed the exhale pressure of a typical human? Meaning spent air could not be expelled to make room for fresh air. Would the pressure keep you from inflating you lungs before you reach this depth? Or would your body be crushed? Assume the snorkle doesn't buckle or crumple under pressure. submitted by /u/mogulman31 [link] [comments]

Does the higgsfield interfere with the conservation of momentum on massive objects? Posted: 01 Mar 2017 05:59 AM PST Wouldnt the higgsfield slow down fast moving objects like the "Starshot" spacecraft if it moves at 0.2c? As the higgs interaction gets stronger the more i boost particles? submitted by /u/Trollimperator [link] [comments]

Is there a mechanism for gross movement of electrons or atoms to raise the energy levels of bound electrons? Posted: 01 Mar 2017 01:40 AM PST I understand that through the photoelectric effect an photon with a higher than ionization energy can be converted into a freed electron with the amount of higher than ionization energy showing up as electron velocity, but does that work the other way? If 2 atoms, both with electrons in their ground states "bump" into each other, can some of that kinetic energy be converted into the either atom's electrons being in a higher energy state? submitted by /u/UncleDan2017 [link] [comments]

Why were there no alternative interpretations of Rutherford Gold Foil Experiment? Posted: 28 Feb 2017 09:50 PM PST While Rutherford's interpretation is intuitive, other interpretations could have been possible. Were there other interpretations, and if so, how were they disqualified in favor of Rutherford Atomic Model? submitted by /u/sudhu28 [link] [comments]

If fusion requires energy and releases even more energy, would the fusion products require energy to separate or would they naturally decay? [physics] Posted: 28 Feb 2017 02:08 PM PST submitted by /u/FU2m8 [link] [comments]

Electron is accelerated in electric field: How are excess energy and momentum accounted for? Posted: 28 Feb 2017 02:53 PM PST Hi, say an electron is passing through a capacitor with an applied dc voltage in a cathode ray tube. The electron is accelerated onto one of the capacitor plates and hence gaining energy and momentum. How is this accounted for in the electric field? Does the electric field get weaker? If so, why and how? I am also asking related to nonlinear optics. Here, one often speaks of the electric field of a laser pulse which is accelerating electrons (and then issuing second harmonic generation and all that). Does the electric field of the laser pulse then gets weakened? I find that hard to imagine, although the excess energy and momentum of the electron have to come from somewhere. Thanks! submitted by /u/nonicknamefornic [link] [comments]

An object falling at terminal velocity is accelerated. The force stops. Does the object slow and return to its terminal velocity and of so, what force is causing this deceleration? Posted: 28 Feb 2017 08:33 PM PST submitted by /u/No_utilities [link] [comments]

Why is alcohol so associated with male violence when it is supposed to lower testosterone? Posted: 28 Feb 2017 08:17 PM PST I've stated the relationship crudely here and am probably missing nuances. Alcohol is associated with all kinds of forms of violence, especially with young men- bar fights, rape, murder, not to mention reckless "testosterone driven" acts like drag racing. But it is supposed to put a damper on testosterone as well. Why doesn't alcohol inhibit testosterone enough to prevent people, especially young men, from doing these things? submitted by /u/Name2522 [link] [comments]

If a free proton and electron combined to produce a Hydrogen atom, is it formed in its excited state? Posted: 28 Feb 2017 07:35 PM PST submitted by /u/CallMeDoc24 [link] [comments]

What would a collision between a star and a planet look like? Posted: 28 Feb 2017 08:55 AM PST In the event that an Sol-sized star and an Earth-sized planet crashed directly into each other, what would the resulting impact look like? Would it appear that the star simply absorbed the planet? Would the impact cause a visible (from 1 au) explosion? Would there be any long-lasting change to the star? I assume a head-on collision to avoid complications of the planet breaking up due to tidal forces in orbit, turning into a ring, etc - This planet is simply plowing into the star. submitted by /u/elongata [link] [comments]

What would be the "reaction" to gravity's "action"? Posted: 28 Feb 2017 06:09 PM PST So I just wanna start by saying I'm in no way a science-y person. I've always beeen a very curious person and I'm really fond of knowledge and constantly trying to learn new things, and I thought for a long time that I loved science, until I took high school chemistry and found out that I don't really care much for the scientific method. So my science knowledge doesn't go much farther than a high school level, but my curiosity is still high, and thus I was wondering: Newton states in his third law of motion that "every action has an equal reaction" (obviously paraphrased but you get the idea). So if in this case, gravity is our "action", what would be the "reaction"? What acts in the other direction (up?) andmaintains us in balance enough to not be crushed by the force of gravity submitted by /u/GuitarHeroJohn [link] [comments]

Are there infinetly many prime numbers? Posted: 28 Feb 2017 02:46 PM PST Are the prime numbers infinite or is there a point on which the numbers get so big it that the propability of them being prime is as good as zero? Because when the numbers get bigger the prime-frequenty gets lower so is there a point where this reaches zero? submitted by /u/BlazingMetal [link] [comments]

[Mathematics] Does any succesive application of roots have a limit? Posted: 28 Feb 2017 02:23 PM PST As in, if you get the square root of the square root of the square root of the square root... of a number. Does it ever approach anything or does it get arbitrarily close to zero? Also, if you get the nth root of a number, and then take the n+1th root and then the n+2th, and so on. Do these operations ever converge to some value? I'm a fan of math but don't really know much about calculus and such, so if the answer is complicated, I'd appreciate the usage of layman terms. submitted by /u/PM_ME_YOUR_DICK_____ [link] [comments]

Are there any fluids that can exist in a vacuum? Posted: 28 Feb 2017 07:04 AM PST A gas would immediately dissipate, and a liquid would boil and dissipate. Even mercury at the top of a manometer is under it's own vapor pressure. Are there any fluids that hold together? submitted by /u/AtHomeToday [link] [comments]

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