When its said that stars orbit the center of galaxies too fast for gravity to hold them, and thus there must be dark matter, is the relativistic mass gained due to their speed accounted for?

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• When its said that stars orbit the center of galaxies too fast for gravity to hold them, and thus there must be dark matter, is the relativistic mass gained due to their speed accounted for?
• Why do lower frequencies seem to travel through materials easier?
• do we actually get vitamin D from the sun, or does sunlight just make it easier for our bodies to absorb the vit. D we get from food?
• Ask Anything Wednesday - Physics, Astronomy, Earth and Planetary Science
• Will we ever be able to send probes onto harsh condition planets?
• Whats going on in your brain while you sleep that makes sleep so important?
• How does gamma radiation effect specific elements, and how long does it linger in soil/air/water?
• Can we estimate what the highest surface air temperature could have been during the historically warmer periods, e.g. during Paleocene-Eocene Thermal Maximum?
• What causes the rising bubbles in carbonated drinks and champagne?
• Why does NO (Nitrogen Monoixde) have nitrogen coming before oxygen in the compound? Why not name it Oxygen Mononitride?
• How does fasting affect cognitive functioning over time?
• Why does the wormhole theory exist at all?
• Why do complex numbers always come in pairs?
• How do credit card chips work?
• Are several copies of the same memory stored in the brain?
• The Intel Broadwell-EP Xeon is a processor with over 7.2 billion transistors. How is something with that many parts designed or manufactured?
• Can the fact that time only flows in one direction be derived from general relativity or is it a postulate in the theory?
• Can active noise cancellation damage hearing over time?
• How to Bubbles work? [More Details in Description]
• How long until the New Horizons spacecraft surpasses the Voyager and Mariner spacecraft? Will that happen in our lifetime?

When its said that stars orbit the center of galaxies too fast for gravity to hold them, and thus there must be dark matter, is the relativistic mass gained due to their speed accounted for? Posted: 14 Dec 2016 02:08 AM PST submitted by /u/avaslash [link] [comments]

Why do lower frequencies seem to travel through materials easier? Posted: 13 Dec 2016 08:00 PM PST You can hear the bass in a song throughout an entire house basically. Why is it that the higher frequencies seem to get lost? submitted by /u/Upshft [link] [comments]

do we actually get vitamin D from the sun, or does sunlight just make it easier for our bodies to absorb the vit. D we get from food? Posted: 13 Dec 2016 02:43 PM PST And if we get it from the sun then how does it work? submitted by /u/Eternasphere [link] [comments]

Ask Anything Wednesday - Physics, Astronomy, Earth and Planetary Science Posted: 14 Dec 2016 07:05 AM PST Welcome to our weekly feature, Ask Anything Wednesday - this week we are focusing on Physics, Astronomy, Earth and Planetary Science 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]

Will we ever be able to send probes onto harsh condition planets? Posted: 14 Dec 2016 05:09 AM PST Will it ever be possible for humans to send a probe into say Venus or Jupiter and be able to not only survive but relay video/photos of the event? It would be amazing to see what these extreme planets actually look like on the surface. submitted by /u/mrdoober [link] [comments]

Whats going on in your brain while you sleep that makes sleep so important? Posted: 13 Dec 2016 08:49 PM PST This is more of a neuroscience question, do specific physiological processes take place during sleep that only occur only in a unconscious state? submitted by /u/Lee_the_scientist [link] [comments]

How does gamma radiation effect specific elements, and how long does it linger in soil/air/water? Posted: 13 Dec 2016 08:55 PM PST Before I ask at r/chemhelp, thought I'd try here. Writing a science fiction story, that involves societies on Earth with helium-fueled fusion reactors powering virtually all of the giant cities around the globe, and am now researching what would happen if an advanced civilization would cope with a gamma ray burst. Was wondering - would the gamma radiation effect Helium-3 in any way? And while I'm asking that, how would it effect the state of deuterium? One last query on gamma radiation - how long does an effected area stay radioactive after exposure to gamma radiation? submitted by /u/mrjwr [link] [comments]

Can we estimate what the highest surface air temperature could have been during the historically warmer periods, e.g. during Paleocene-Eocene Thermal Maximum? Posted: 14 Dec 2016 03:59 AM PST submitted by /u/daneelr_olivaw [link] [comments]

What causes the rising bubbles in carbonated drinks and champagne? Posted: 13 Dec 2016 11:45 PM PST submitted by /u/DEADSCOPED [link] [comments]

Why does NO (Nitrogen Monoixde) have nitrogen coming before oxygen in the compound? Why not name it Oxygen Mononitride? Posted: 13 Dec 2016 10:56 AM PST submitted by /u/Parzivelthegreat [link] [comments]

How does fasting affect cognitive functioning over time? Posted: 13 Dec 2016 09:46 AM PST I'm curious about fasting and it's affect on normal cognitive functioning? Evolutionarily wouldn't it be a disadvantage if fasting negatively affecting cognitive functioning significantly? Historically people didn't have as much access to food during winter months and I'm curious about how this affected their day to day lives. submitted by /u/popwinner [link] [comments]

Why does the wormhole theory exist at all? Posted: 13 Dec 2016 02:39 PM PST When two of my friends were talking about wormholes and i told them there is no evidence at all for wormholes they started talking about how multiple scientists claim they do exist. We all proceeded to look it up and I was correct however I do not understand where the theory even came from. Is the theory that black holes are wormholes and if so how would something that simply has an unimaginable mass in a small space make you transport to a different place in space. Also what made scientists think about such a theory was some anomaly in space observed that suggested the existence of them? Thank you for ur help! :) submitted by /u/Darth_Meme_Pepe [link] [comments]

Why do complex numbers always come in pairs? Posted: 13 Dec 2016 01:54 PM PST For example, if we discover the coefficient matrix of a system of differential equations has complex eigenvalues (say a±bi), why do the corresponding eigenvectors also come with conjugates (say {c±di, e})? submitted by /u/Static_Unit [link] [comments]

How do credit card chips work? Posted: 13 Dec 2016 02:14 PM PST How do credit card chips work differently than the magnetic strips? Why can the credit card chip not be intercepted by a scammer and be reproduced while the magnetic strip can? submitted by /u/der_dutchess [link] [comments]

Are several copies of the same memory stored in the brain? Posted: 13 Dec 2016 09:53 AM PST Is there just one single copy, or are there several. If so, are they all stored in the same hemisphere? submitted by /u/Fornaas [link] [comments]

The Intel Broadwell-EP Xeon is a processor with over 7.2 billion transistors. How is something with that many parts designed or manufactured? Posted: 13 Dec 2016 10:44 AM PST So even if there is a machine that quickly place 7.2 billion parts, someone had to say where they go. Even if we accept that this happened over time, the number of transistors added to subsequent models has increased exponentially so designing new ones seems increasingly difficult. Code does quite a bit I'm sure, but then how are they placed? With some kind of template I'd assume, but of course the question is how long does it take to make the template? submitted by /u/TheFlying [link] [comments]

Can the fact that time only flows in one direction be derived from general relativity or is it a postulate in the theory? Posted: 13 Dec 2016 12:53 PM PST How does the minus sign in the metric result in time being unidirectional? I was never really satisfied with using the 'entropy always increases' argument in the context of GR. submitted by /u/ultraking_x2 [link] [comments]

Can active noise cancellation damage hearing over time? Posted: 13 Dec 2016 07:29 AM PST It's my understanding that active noise cancellation generates the inverse of an incoming audio wave to cancel out the incoming wave. That would create double the energy passing over the eardrum. However, because the the waves have been cancelled, the eardrum does not vibrate/absorb energy. If that is the case, then how is the energy in the two waves dissipated? submitted by /u/Coconut_Twister [link] [comments]

How to Bubbles work? [More Details in Description] Posted: 13 Dec 2016 06:35 PM PST I simply don't understand the physics of bubbles, why they float instead of immediately falling to the earth. How the bubble maintains its shape, along with why smaller bubbles always seem to be a sphere while larger ones are amorphous blobs. Also why do bubbles look like they collapse in on themselves when they pop instead of explode outward... I just don't understand bubbles, this stuff has been annoying me for a long time. Can someone please explain the inner workings of bubble physics? submitted by /u/BulbStar [link] [comments]

How long until the New Horizons spacecraft surpasses the Voyager and Mariner spacecraft? Will that happen in our lifetime? Posted: 13 Dec 2016 08:35 AM PST submitted by /u/Steveman180 [link] [comments]

You are subscribed to email updates from AskScience: Got Questions? Get Answers.. To stop receiving these emails, you may unsubscribe now.	Email delivery powered by Google
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AskScience AMA Series: I'm David Biello, science curator for TED Talks. I just wrote a book about how people's impact are permanently altering our planet for the (geologic) long term. AMA!

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• AskScience AMA Series: I'm David Biello, science curator for TED Talks. I just wrote a book about how people's impact are permanently altering our planet for the (geologic) long term. AMA!
• Does the infinite series 1/1-1/2+1/3-1/4... converge?
• So on the front page is a post about oil being able to completely cover an area of water with a one molecule thick layer. For large industrial oil spills, how does this layer affect the absorption of carbon from the atmosphere?
• Can a potential difference between two plates strip away electrons from one of the plates?
• Are psychosomatic symptoms cultural? Regional?
• Why is SO2 possible, but not S2O?
• Is it possible to cool water down past 0C without it turning into ice?
• Why are the Maldives so flat?
• Is there a closed-form equation for this type of curve generated by connecting points on a graph?
• Why are so many basic Physics formulas in the form of 0.5ab^2?
• How are the two main definitions of entropy equivalent?
• How are fast nuclear reactor operated ?
• Is there an upper limit for the size of a star?
• What is the best book that describes current string theory (or how it's evolved)?
• What are the different ways to contain a magnetic field? Also, is there a magnet which self-contains it own field within a specified volume?
• What is the origin of the "fine" and "hyperfine" structures?
• What makes it ok for sea mammals to drink sea water?
• How dramatically does human behavior change when a person understands their actions won't be punished/have consequences?
• Why aren't there "snow thunderstorms?"
• What is a tensor and why should I care about one?

AskScience AMA Series: I'm David Biello, science curator for TED Talks. I just wrote a book about how people's impact are permanently altering our planet for the (geologic) long term. AMA! Posted: 13 Dec 2016 05:00 AM PST I am a science journalist who has been writing about the environment long enough to be cynical but not long enough to be completely depressed. I'm the science curator for TED Talks, a contributing editor at Scientific American, and just wrote a book about this idea that people's impacts have become so pervasive and permanent that we deserve our own epoch in the geologic time scale. Some people call it the Anthropocene, though that's not my favorite name for this new people's epoch, which will include everything from the potential de-extinction of animals like the passenger pigeon or woolly mammoth to big interventions to try to clean up the pollution from our long-term pyromania when it comes to fossil fuels. I live near a Superfund site (no, really) and I've been lucky enough to visit five out of seven continents to report on people, the environment, and energy. I'll be joining starting at 2 PM EST (18 UT). AMA. submitted by /u/AskScienceModerator [link] [comments]

Does the infinite series 1/1-1/2+1/3-1/4... converge? Posted: 13 Dec 2016 04:09 AM PST I know the series 1 + 1/2 + 1/3 ... diverges, but if the sign changes every entry, does it still diverge? submitted by /u/Awdrgyjilpnj [link] [comments]

So on the front page is a post about oil being able to completely cover an area of water with a one molecule thick layer. For large industrial oil spills, how does this layer affect the absorption of carbon from the atmosphere? Posted: 12 Dec 2016 08:08 PM PST I've got to imagine that a large oil spill would literally cover hundreds of square miles if the oil is distributed as a one-molecule layer. Considering how often this happens, does it contribute to climate change, or is the effect relatively neutral? submitted by /u/LostSoulsAlliance [link] [comments]

Can a potential difference between two plates strip away electrons from one of the plates? Posted: 12 Dec 2016 05:56 PM PST I have a feeling the answer is yes I would just like to know if I am correct/why it's correct. I understand how the photoelectric effect works and how if a photon has enough energy it can free an electron from a metal (the examples I always saw in class had a setup with two parallel plates, with the freed electrons crossing the space in between the plates). So could a high enough potential difference (say like between the two plates) strip the electrons from the metal of one of the plates similar to the photoelectric effect? Picture that may clear up what I mean submitted by /u/stars_bitch67 [link] [comments]

Are psychosomatic symptoms cultural? Regional? Posted: 13 Dec 2016 04:14 AM PST Somatization and psychosomatic symptoms (such as headaches, back pains, diarrhoea, stomach cramps, respiratory distress, chest tightenings, etc) are prevalent in most populations. But do those symptoms tend to be more prevalent in specific cultures? Does one group of people exhibit primarily psychosomatic gastrointestinal symptoms, whereas a different group of people will have mainly musculoskeletal symptoms? Do people in Japan somatize mostly in headaches whereas people of a middle upper-class income exhibit mainly backpain? Are these differences of a cultural or regional nature? Do they evolve over time? submitted by /u/EdwardGrey [link] [comments]

Why is SO2 possible, but not S2O? Posted: 13 Dec 2016 02:13 AM PST Or for example why is H2SO4 possible, but not H2OS4? This question may sound dumb, but I can't work it out. Sulphur and oxygen have the same amount of electrons in the valence shell, so shouldn't they be interchangeable in compounds? submitted by /u/GlaciaX [link] [comments]

Is it possible to cool water down past 0C without it turning into ice? Posted: 13 Dec 2016 02:43 AM PST submitted by /u/IAlreadyHaveTheKey [link] [comments]

Why are the Maldives so flat? Posted: 12 Dec 2016 03:45 PM PST I would have thought that, as islands, they would be the "peaks" of mountains/volcanoes sticking out of the water meaning they would be hardly flat at all. submitted by /u/marley88 [link] [comments]

Is there a closed-form equation for this type of curve generated by connecting points on a graph? Posted: 12 Dec 2016 04:11 PM PST This picture shows the curve which is generated by connecting the points (0, 0) to (10, 0), (0, 1) to (9, 0), and so on. Of course, the endpoints don't have to be (10, 0) and (0, 10), they can be (X, 0) and (0, X). My question is: as I increase the number of subdivisions, e.g. connecting (0, 0.1) to (9.9, 0), until the spacing between lines becomes an infinitesimal quantity, is there a closed-form equation for the resulting curve that bounds all the lines within, assuming I use the endpoints (10, 0) and (0, 10)? My guess, just from looking at the rough shape of the curve, is that it is the arc of a quarter-circle with the center at (10, 10). Or is it not as simple as that? submitted by /u/F21A577A1A5CF54951A9 [link] [comments]

Why are so many basic Physics formulas in the form of 0.5ab^2? Posted: 12 Dec 2016 07:03 PM PST The title pretty much sums up my question. To be more specific however, why are so many of the basic mechanics physics formulas all in the same general form of 0.5ab2. For example, Kinetic Energy is 0.5mv2, and spring potential is 0.5kx2. In the kinematic equation x=xit+0.5at2, the 0.5at2 shows up again. In the formula for energy of a particle in simple harmonic motion, the energy formula is once again 0.5kA2. It even shows up sometimes in some of the most basic electricity and magnetism formulas for potential energy. Obviously some constant times x, when integrated, gives 0.5cx2, but I was curious is there is some other reason this form for equations shows up so often, or if it just a product of integration. My apologies if this is a very basic question, or a meaningless one. I am still in high school physics and haven't reached anywhere close to a high level of understanding with regards to physics. Thanks! submitted by /u/teleknight [link] [comments]

How are the two main definitions of entropy equivalent? Posted: 12 Dec 2016 03:40 PM PST I've heard two definitions of entropy that seem slightly different, one from the thermodynamic perspective and one from stat mech. How are the two equivalent or consistent? Mathematical proofs are fine and appreciated. submitted by /u/wanker75 [link] [comments]

How are fast nuclear reactor operated ? Posted: 13 Dec 2016 05:40 AM PST Hi there, I am looking for fellow nuclear engineers working on fast reactors as a question popped in my mind. If the neutron spectrum is fast (e.g. around 400 keV for SFR) in a fast nuclear reactor , then how do control rods work ? After a little research, I found that control rods are made in boron-10 (B4C), which is well known for having a big capture cross section. But how is that enough for fast reactors ? Your rods are only going to "eat up" the thermal tail of the spectrum, but the "hard" part will still remain and contribute to the reactivity, which by definition for a fast reactor is the main part ? Am I missing something ? submitted by /u/GoBackToTheKitchen [link] [comments]

Is there an upper limit for the size of a star? Posted: 12 Dec 2016 10:59 AM PST So, I know that when a star dies, its size dictates its final fate - from going supernova and ending up as a black hole to fading into a white dwarf. I also know that a star's size roughly dictates the length of its lifespan, with larger stars burning out more quickly. I also do know that there is a lower limit to the size of a star - a minimum mass before fusion can be achieved. So, is there any maximum mass for a star? Like a point where the star just instantly goes supernova, or just is unstable? I'm not sure if I'm phrasing the question well, but I hope it is understandable. If there is an upper limit, what is the calculation or theory used to derive this value? Thank you! submitted by /u/blackspidey2099 [link] [comments]

What is the best book that describes current string theory (or how it's evolved)? Posted: 12 Dec 2016 08:19 PM PST Something along the lines of "The Elegant Universe" - which as a layperson I could understand (mostly, I think...). But that book came out years ago and I'd to stick my beak back into things and read about what some really smart people thing the universe actually is. I really enjoy this stuff, but I'm not in the know on what books really talk about the bleeding edge stuff and what are the "good" ones (so far google searches haven't been a huge amount of help, because they bring up so many books from years and years ago...and I don't know who the really respected authors are). Thanks in advance!! submitted by /u/noo8 [link] [comments]

What are the different ways to contain a magnetic field? Also, is there a magnet which self-contains it own field within a specified volume? Posted: 13 Dec 2016 04:52 AM PST I'm trying to engineer a mechanism that uses magnets in vehicles for power transmission. However, I don't want the magnet to interfere with any other component in the vehicle. Any idea on how to contain its magnetic field under my desired volume? Alternatively, is there any type of magnet that self-contains its field so I don't have to end up using more parts? submitted by /u/YellowJalapa [link] [comments]

What is the origin of the "fine" and "hyperfine" structures? Posted: 12 Dec 2016 03:12 PM PST I know it's to do with angular momenta coupling, but I don't understand what this physically means. If the electronic and nuclear angular momenta couple together, why does this result in a splitting of states? submitted by /u/Ajaac [link] [comments]

What makes it ok for sea mammals to drink sea water? Posted: 12 Dec 2016 08:11 PM PST For us land bearing folk, drinking too much salt water is bad. But whales and sea lions don't have much of a choice, right? submitted by /u/MechBearded [link] [comments]

How dramatically does human behavior change when a person understands their actions won't be punished/have consequences? Posted: 12 Dec 2016 07:53 PM PST Or if there are any prominent studies performed in this area I could read up on, that would also be incredibly helpful submitted by /u/dothesports [link] [comments]

Why aren't there "snow thunderstorms?" Posted: 12 Dec 2016 09:00 AM PST We all know about rain thunderstorms, but I don't ever remember experiencing a snow thunderstorm. Do they not exist? If so, why? submitted by /u/UNoahGuy [link] [comments]

What is a tensor and why should I care about one? Posted: 12 Dec 2016 08:13 AM PST We are learning about tensors in EM but all we got were a list of axioms instead of an explanation of what one is. As if we were introduced to vectors by being given the abstract definition of a vector space without being told its something with a magnitude and direction. submitted by /u/gatherinfer [link] [comments]

You are subscribed to email updates from AskScience: Got Questions? Get Answers.. To stop receiving these emails, you may unsubscribe now.	Email delivery powered by Google
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What is the derivative of "f(x) = x!" ?

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• What is the derivative of "f(x) = x!" ?
• What do we know about the surface of Venus? What does the surface consist of to withstand the corrosive atmosphere?
• In multi-star systems, what is the furthest known distance between two systems orbiting each other?
• Could someone explain the use of the different units utilized in radiation science?
• How does the Large Hadron Collider work?
• What is "strangeness"? And how does it affect subatomic particles?
• When we say that nothing, not even light, can escape a black hole, does that just mean nothing that we currently know exists? is it concievable that something could have physical properties that would allow it to escape from the gravity of a black hole?
• Are face muscles controlled through the spine?
• Why is this silicone cover giving off dim light when warped?
• How does Noether theorem explains the constant speed of light?
• Is space continuous? And if is it then why do we have Planck Length?
• What is the chemistry behind toilet bowl cleaners that change color when the surface is "clean"?
• Is there scientific evidence that chemical imbalance in the brain is a causal factor of chronic depression, or is it possible causality points in the other direction?
• How does a computer go from assembly to machine code to doing things?
• How often do "earth"quakes happen on other planets? Are some planets more prone or less prone to earthquakes?
• Can you measure the temperature of a single atom? If not, what is the smallest amount of matter that you can measure the temperature of?
• If I tell you what day of the week my birthday falls on every year, how many years (samples) will you need to determine my exact birthdate?
• How does a cryptographic attack know when it's succeeded?
• How did we discover that certain materials could be used for data storage, such as in hard disk drives, magnetic tape and silicone based components?
• Why when you hold something very close to your eye, does it have a kind of aura around it?
• How does a cell know what kind of cell it is?
• Peanut Butter and Jelly each have about the same viscosity. Why do they behave so differently when stirred or spread?
• How is generator potential triggered in mechanoreceptors such as Merkel's discs, Ruffini corpsucles, and Meissner corpsucles?

What is the derivative of "f(x) = x!" ? Posted: 12 Dec 2016 04:15 AM PST so this occurred to me, when i was playing with graphs and this happened https://www.desmos.com/calculator/w5xjsmpeko Is there a derivative of the function which contains a factorial? f(x) = x! if not, which i don't think the answer would be. are there more functions of which the derivative is not possible, or we haven't came up with yet? submitted by /u/RAyLV [link] [comments]

What do we know about the surface of Venus? What does the surface consist of to withstand the corrosive atmosphere? Posted: 12 Dec 2016 05:08 AM PST submitted by /u/zaklco [link] [comments]

In multi-star systems, what is the furthest known distance between two systems orbiting each other? Posted: 11 Dec 2016 08:04 AM PST submitted by /u/worldofwarcraft9 [link] [comments]

Could someone explain the use of the different units utilized in radiation science? Posted: 11 Dec 2016 11:38 PM PST I'm so confused with all the units used for determining radiation. Can someone please explain to me what's the difference and the USE of the the units? I've been told to speak to patients in terms of BERTs... but then.... Grays, Siverts, Curies, Bequrels, Rads... etc... Is there also a difference when describing "generated" radiation (ie electron beam to a W target) vs natural? If I can't figure it out I'm going to be a completely shit clinician for my patients :( Why the hell can't we just have one set of units :( submitted by /u/WH1PL4SH180 [link] [comments]

How does the Large Hadron Collider work? Posted: 11 Dec 2016 07:54 AM PST Also what does it actually do? submitted by /u/OinkGoesPig [link] [comments]

What is "strangeness"? And how does it affect subatomic particles? Posted: 12 Dec 2016 05:26 AM PST I'm learning about leptons, baryons and mesons and some of them have a value called "strangeness", my teacher doesn't know what it is a measurement for and everyone gives me weird looks when I ask what strangeness is. My point is, some particles are charged, with that charge, they repel other particles with the same charge and attract particles with opposing charges, that's how charge affects particles. But how does strangeness affect particles? At the moment, it's just a meaningless, faceless value to me. :/ submitted by /u/monjonltd [link] [comments]

When we say that nothing, not even light, can escape a black hole, does that just mean nothing that we currently know exists? is it concievable that something could have physical properties that would allow it to escape from the gravity of a black hole? Posted: 11 Dec 2016 03:31 PM PST submitted by /u/CptSnowcone [link] [comments]

Are face muscles controlled through the spine? Posted: 11 Dec 2016 07:04 PM PST I'm curious if the brain has to send signals through nerves in the spine to control face muscles, or if it can just go straight to the face because of the proximity. submitted by /u/ChineseFountain [link] [comments]

Why is this silicone cover giving off dim light when warped? Posted: 11 Dec 2016 11:53 PM PST I recently bought an "object" covered in silicone, and while checking it for potential surface damage by warping it I noticed that it was giving off a very faint, but in low light conditions, rather apparent yet brief spurt of light. Now the object is battery powered and was on at the time of discovery, so I at first assumed it was defective and that the batteries inside were transferring electricity to the silicone and giving off a slight spurt of light, and I was therefore rather reluctant to use it for it's intended purpose, so I decided to remove the batteries for the time being. It has now been approximately been two days since I did this and any residual energy from the batteries should've disappeared, in case that was the culprit, but after checking again just now it's still happening and after a rather long time trying to phrase the question in a Google search I've found nothing. So I come here today asking, what do you think is giving off photons from this silicone? Is it a small amount of static electricity being generated by the friction of the silicone and the inner lining plastic surface of the battery compartment? Am I through touch transferring enough energy to the silicone and resulting in it manifesting beneath the surface as static electricity? submitted by /u/DevaKitty [link] [comments]

How does Noether theorem explains the constant speed of light? Posted: 11 Dec 2016 08:01 PM PST What symmetry causes the constant speed of light? submitted by /u/Frigorifico [link] [comments]

Is space continuous? And if is it then why do we have Planck Length? Posted: 11 Dec 2016 02:07 PM PST I have always wondered if space can be quantized or not. We have always been told that space is continuous. But if that is the case then why does Planck Length exist? submitted by /u/bitemyamygdala [link] [comments]

What is the chemistry behind toilet bowl cleaners that change color when the surface is "clean"? Posted: 12 Dec 2016 02:41 AM PST Chemical % Weight Silica,amorphous,precipitated and gel 1.0 - 3.0 Butanedioic acid, hydroxy-, (.+-.)- 30 - 40 Sodium bicarbonate 50 - 60 Sodium carbonate 5 - 7 Butanedioic acid, sulfo-, C-dodecyl ester, disodium salt 2 - 3 Alcohols, C10-16, ethoxylated 1 - 4 submitted by /u/vocabularian [link] [comments]

Is there scientific evidence that chemical imbalance in the brain is a causal factor of chronic depression, or is it possible causality points in the other direction? Posted: 11 Dec 2016 08:31 PM PST submitted by /u/simism [link] [comments]

How does a computer go from assembly to machine code to doing things? Posted: 11 Dec 2016 04:23 PM PST I understand that assembly almost directly corresponds with machine code, but what steps are required after the machine code translation to do something such as adding a value to the register? submitted by /u/Artillect [link] [comments]

How often do "earth"quakes happen on other planets? Are some planets more prone or less prone to earthquakes? Posted: 11 Dec 2016 04:29 PM PST submitted by /u/LivingRaccoon [link] [comments]

Can you measure the temperature of a single atom? If not, what is the smallest amount of matter that you can measure the temperature of? Posted: 11 Dec 2016 10:32 AM PST submitted by /u/vannooz [link] [comments]

If I tell you what day of the week my birthday falls on every year, how many years (samples) will you need to determine my exact birthdate? Posted: 11 Dec 2016 03:38 PM PST submitted by /u/bongoltay [link] [comments]

How does a cryptographic attack know when it's succeeded? Posted: 11 Dec 2016 04:06 PM PST If you present a ciphertext to a computer program that was written to break the text's encryption, how would that program know it's made a successful attempt? In a primitive brute force attack, you might have millions/billions/whatever amount of possible keys to iterate through, each one producing some sort of "plaintext" once it operates on the ciphertext. How would the program know it's actually produced the plaintext on one of these iterations? submitted by /u/itCompiledThrsNoBugs [link] [comments]

How did we discover that certain materials could be used for data storage, such as in hard disk drives, magnetic tape and silicone based components? Posted: 12 Dec 2016 01:41 AM PST I've been looking data storage and I understand the principles of how data is stored on certain items like hard drives, SSDs, tapes, ect... but I'm curious as to how we discovered that these materials could store and hold data for long periods of time in the first place. submitted by /u/SatSenses [link] [comments]

Why when you hold something very close to your eye, does it have a kind of aura around it? Posted: 11 Dec 2016 02:21 PM PST When I hold my finger or phone right up to my eye, it has a blurry aura around it. What is it? Is it something to do with the human eye or the particles in the object? submitted by /u/x45251s [link] [comments]

How does a cell know what kind of cell it is? Posted: 11 Dec 2016 12:32 PM PST As I understand, the "job" of a cell is determined by which parts of the DNA are loosely packed and which parts are tightly packed. But how does this packing look like in stem cells and what happens when they differentiate? submitted by /u/theluke112 [link] [comments]

Peanut Butter and Jelly each have about the same viscosity. Why do they behave so differently when stirred or spread? Posted: 11 Dec 2016 04:02 PM PST submitted by /u/phort99 [link] [comments]

How is generator potential triggered in mechanoreceptors such as Merkel's discs, Ruffini corpsucles, and Meissner corpsucles? Posted: 11 Dec 2016 11:27 PM PST The closest I could figure out by googling is that generator potential is triggered when cells are deformed. How are they different from Lamellar corpsucles, the mechanism of which was "easily" found by searching google for a few hours instead of asking the experts here? submitted by /u/JoshWithaQ [link] [comments]

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