How fast would a metal object have to move through Earth's magnetic field to generate significant electrical current?

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• How fast would a metal object have to move through Earth's magnetic field to generate significant electrical current?
• Is it possible for two colliding neutron stars to be sufficiently low-mass that a black hole does not form?
• Is it possible to focus natural light into a high density solar beam with modern technology?
• How do computers get an exact value for integration and derivatives?
• Is there a limit to how much hair a human can grow?
• If, from earth, we can see Venus as a white-pinkish dot, would we see the Earth as a blue dot if we were on Venus? Assuming that ideally there were no clouds and the sky was clear.
• Are there any radioisotopes that we can visibly watch decaying?
• Can heat be blown by the wind?
• As an electron moves across a voltage difference, is it emitting virtual particles and/or actual photons to accommodate the reduction in energy?
• Does turning bathroom vents off and unplugging small appliances (coffee makers and toasters) conserve enough energy that it will actually save money on electric bills?
• Ask Anything Wednesday - Physics, Astronomy, Earth and Planetary Science
• In a neutron, is it possible for the up quark to decay into a down quark?
• How can scientists accurately measure the populations of insects?
• Why doesn't the integral from 0 to infinity of sinx dx equal zero?
• How do quantum fluctuations- particles appearing from nothing and annihilating each other- follow the law of conservation of matter and energy?
• How do the physics behind playground swings work?
• Why would gold particles with fewer neutrons end up having a larger nucleus?
• How can pain relievers like ibuprofen sometimes eliminate pain when all they really address is the sensitivity of nociceptors after tissue damage, not the nociceptive response to noxious stimuli in the first place?
• Why do people black out when they reach a certain amount of pain?
• Can cobalt (or any other metal) trigger ones sensitivity if it's bound up in a molecule?
• Does the DNA in our semen change over time?
• Is dolphin/whale communication instinctive or do they have to learn it like humans do?

How fast would a metal object have to move through Earth's magnetic field to generate significant electrical current? Posted: 17 Oct 2017 03:54 PM PDT Say you have a 10 meter long conductor. How fast would it need to move to generate a few milliamps? Enough to light a low power LED? submitted by /u/banksjh [link] [comments]

Is it possible for two colliding neutron stars to be sufficiently low-mass that a black hole does not form? Posted: 17 Oct 2017 06:11 PM PDT submitted by /u/pavel_lishin [link] [comments]

Is it possible to focus natural light into a high density solar beam with modern technology? Posted: 17 Oct 2017 05:55 PM PDT I've read John Ringo's Try Rising Series. The starting point for this question. (P.S. I'm saying beam instead of L.A.S.E.R) I also caught a decent xkcd on the subject of focusing natural sunlight into a tight beam and basically calling it complete BS. 3. I'm wondering if there's any way you can use fiber optics or any other material to collect a large amount of naturally occurring light to condense it into a tighter beam. I realize beam may be subjective, but understand it to have minimal diffraction/loss of energy over long distances and the spread to be less than .001% type of thing. Could it be possible to use highly confined magnetic-fields to bend the directions of light into tighter beams, sort of like a solenoid? Finally, (stepping into a bit of Sci-fi), If we could master creating highly localized gravitational fields, would it then be possible to take large amounts of light from a source like the sun and focus it into long continuous beams, since we know through gravitational lensing that we can seriously affect the trajectory of light? Thank you, submitted by /u/cptncivil [link] [comments]

How do computers get an exact value for integration and derivatives? Posted: 17 Oct 2017 06:04 PM PDT It seems like doing calculus involves a lot of intuition that would be hard for a computer, like a graphing calculator or WolframAlpha, to do. submitted by /u/ddotquantum [link] [comments]

Is there a limit to how much hair a human can grow? Posted: 17 Oct 2017 06:05 PM PDT Not just on your head, but everywhere submitted by /u/mista_rida_ [link] [comments]

If, from earth, we can see Venus as a white-pinkish dot, would we see the Earth as a blue dot if we were on Venus? Assuming that ideally there were no clouds and the sky was clear. Posted: 18 Oct 2017 01:11 AM PDT submitted by /u/NoweShadow [link] [comments]

Are there any radioisotopes that we can visibly watch decaying? Posted: 17 Oct 2017 02:34 PM PDT submitted by /u/xXswagmeisterXx [link] [comments]

Can heat be blown by the wind? Posted: 18 Oct 2017 05:46 AM PDT More specifically, can wind affect the path of thermal radiation? When you're sitting next to a campfire and the wind shifts towards you, you get a face full of smoke and heat. But is that wind affecting the thermal radiation pathing or is the wind really just pushing the hot water vapor (steam) that's a consequence of combustion? submitted by /u/MuffMagician [link] [comments]

As an electron moves across a voltage difference, is it emitting virtual particles and/or actual photons to accommodate the reduction in energy? Posted: 17 Oct 2017 10:55 PM PDT Im trying to understand some aspects of electromagnetism. Initially I was thinking about what makes lightning visible submitted by /u/37litebluesheep [link] [comments]

Does turning bathroom vents off and unplugging small appliances (coffee makers and toasters) conserve enough energy that it will actually save money on electric bills? Posted: 17 Oct 2017 04:29 PM PDT submitted by /u/notgraceful11199 [link] [comments]

Ask Anything Wednesday - Physics, Astronomy, Earth and Planetary Science Posted: 18 Oct 2017 08:07 AM PDT 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]

In a neutron, is it possible for the up quark to decay into a down quark? Posted: 17 Oct 2017 06:54 PM PDT If it's possible would the charge be -1 since down quarks have a charge of -1/3(as far as I know)? submitted by /u/DiaperDaddy69 [link] [comments]

How can scientists accurately measure the populations of insects? Posted: 17 Oct 2017 05:49 PM PDT submitted by /u/AethonMT [link] [comments]

Why doesn't the integral from 0 to infinity of sinx dx equal zero? Posted: 17 Oct 2017 03:39 PM PDT Hello. Kind of stumped on this problem from a conceptual stand point. If you graph sinx, each area above the x- axis should cancel out with the area below the x-axis so I'm not sure why we can't say it's equal to zero. submitted by /u/pjc013 [link] [comments]

How do quantum fluctuations- particles appearing from nothing and annihilating each other- follow the law of conservation of matter and energy? Posted: 17 Oct 2017 07:01 PM PDT This has been bugging me for a while and I cant find a good answer to this. submitted by /u/leonardmatt [link] [comments]

How do the physics behind playground swings work? Posted: 17 Oct 2017 12:30 PM PDT How is energy from "pumping" or leaning backwards / forward and extending legs converted into motion? submitted by /u/gENTlemanMatthew [link] [comments]

Why would gold particles with fewer neutrons end up having a larger nucleus? Posted: 17 Oct 2017 04:44 PM PDT I was reading Wallermoth et al. (1989) and they described neutron deficient gold nucleii as having greater radius than some heavier isotopes. Why might this be? The paper mentions proton spins at some point, would this be relevant? submitted by /u/chris_bryant_writer [link] [comments]

How can pain relievers like ibuprofen sometimes eliminate pain when all they really address is the sensitivity of nociceptors after tissue damage, not the nociceptive response to noxious stimuli in the first place? Posted: 17 Oct 2017 03:31 PM PDT It seems like this would just keep the pain from getting worse by inhibiting the production of prostaglandins and keeping the nociceptive threshold normal, not relieve the pain present at the normal threshold being caused by the underlying stimulus. Is it because ibuprofen also inhibits the production of prostaglandins that result in inflammation, and inflammation is the underlying pain stimulus that's being eliminated? If that's the case, is ibuprofen unable to relieve pain that isn't caused by inflammation? submitted by /u/SleepingMonad [link] [comments]

Why do people black out when they reach a certain amount of pain? Posted: 17 Oct 2017 01:40 PM PDT Why do our bodies do this? Does the blacking out protect us? How exactly do we black out from so much pain, what is the process within our body that decides the amount of pain we are experiencing is too severe and we have to go to sleep? edit: rewording submitted by /u/temporubat0 [link] [comments]

Can cobalt (or any other metal) trigger ones sensitivity if it's bound up in a molecule? Posted: 17 Oct 2017 08:26 PM PDT People with cobalt allergies and sensitivities are warned to stay away from ingesting b12 as a supplement. Is this due to the Co atom in cyanocobalamin or is it the leftover reagent from manufacturing? To continue with that, do cobalt containing steels pose a similar risk? And should this be flaired biology or chemistry? submitted by /u/littledragonroar [link] [comments]

Does the DNA in our semen change over time? Posted: 17 Oct 2017 09:05 PM PDT For example at 22 I'm fat but at 26 I'm ripped and strong. Will my DNA in seen change was we do? Maybe depending on how you're your at a certain spot in time will your children be more likely to be as you are now submitted by /u/eduwills69 [link] [comments]

Is dolphin/whale communication instinctive or do they have to learn it like humans do? Posted: 17 Oct 2017 10:53 AM PDT If they have to learn it, are there multiple "languages" from different places on Earth? submitted by /u/HenryFrenchFries [link] [comments]

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How much of sleep is actual maintenance downtime, and how much is just time-killing energy conservation?

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• How much of sleep is actual maintenance downtime, and how much is just time-killing energy conservation?
• What would happen if sea levels DROPPED?
• Is it 'unusual' for the earth to contain as much gold and platinum as it does, relative to rocky planets orbiting other stars?
• What large research projects (equivalent in scale to LHC or ITER) are in the early proposal or design stage that non-scientists haven’t heard of yet?
• Why is the sun red in some parts of the UK right now?
• Where does the energy go if there's no load on a solar panel?
• Why do some fruits have multiple seeds while others have just 1?
• Would a black hole really appear as a sphere like in Interstellar?
• What do trig functions with h mean? i.e sinh(x)
• How did the pioneers of nuclear science in the 1930s detect different elements during their discovery of fission?
• Nuclear power plants, how long could they run by themselves after an epidemic that cripples humanity?
• How was the height of Mt. Everest measured with reasonable accuracy by surveyors of the Great Trigonometric Survey back in 1852?
• Do dolphins have groups of communities (different pods) that have a web of a community like we do via the work we do or the things we like to do? Do pods ever meet up to play?
• How does stress influence drug reactivity?
• How do fractional derivatives work?
• What makes body parts tingle when they fall asleep or cut off circulation?
• Do other animals appreciate art?
• In a can of soda, is the air pressure uniformly distributed throughout the can, or is there some imbalance of pressure near where the gas is?
• Why Does Space Smell Like Burning Metal?
• Is the Yellowstone Caldera going to erupt in our lifetime?
• Is the energy of an object depleted if it reaches the center of a gravity well?
• Is it just a coincidence or a specific reason why several elements in the same group have the atomic weight/number of protons increased by 8, 18, or 32 to form the next element in the group? Is there a mathematical formula that uses atomic weight to determine its properties?
• How serious of an issue is radon in basements?
• Why did Eris, the dwarf planet that caused Pluto to get demoted, only get discovered in 2005?
• How do devices that utilize electron beams generate the free electrons, and why doesn't that cause a buildup of positive charge that interferes with its function?

How much of sleep is actual maintenance downtime, and how much is just time-killing energy conservation? Posted: 16 Oct 2017 09:07 PM PDT The idea of science developing a means of reducing sleep to pure function or increasing the efficiency thereof is fascinating to me. My understanding of sleep in animals is that some maintenance is performed by the mind and body, but animals also sleep to conserve energy during unfavorable periods of time be it yearly hibernation cycles or evolved specialization to periods of the night/day cycle. submitted by /u/zergblush9 [link] [comments]

What would happen if sea levels DROPPED? Posted: 16 Oct 2017 05:55 AM PDT We always hear about the social/economic/environmental problems and side effects of worldwide rising sea levels, but out of curiosity, what would one expect if the opposite was true? How would things change if sea level dropped, say, 10-20 metres. More, if that's more interesting. Thanks in advance! Edit: thanks everyone for the thought out and informative comments, dnd setting inbound ;) submitted by /u/blaertes [link] [comments]

Is it 'unusual' for the earth to contain as much gold and platinum as it does, relative to rocky planets orbiting other stars? Posted: 17 Oct 2017 04:28 AM PDT Yesterday's amazing anouncement of the neutron star merger was fascinating in part because the debris from the kilonova apparently had large amounts of newly created heavy metals, including an estimated ~200 earth masses of gold and ~500 earth masses of platinum. Since neutron star mergers are said to be quite rare, I am wondering if our solar system is somewhat what unique due to the relatively high prevalence of gold and platinum in its rocky bodies. Are these metals frequently detected in the spectra of other stars, or our solar system unusual in that regard? submitted by /u/orange_kangaroo [link] [comments]

What large research projects (equivalent in scale to LHC or ITER) are in the early proposal or design stage that non-scientists haven’t heard of yet? Posted: 16 Oct 2017 12:37 PM PDT It seems like the public only becomes aware of projects like LHC or ITER when funding has been approved. What large scale research projects in your field will we be hearing about in the near future? submitted by /u/WarrenGHarding [link] [comments]

Why is the sun red in some parts of the UK right now? Posted: 16 Oct 2017 07:02 AM PDT Seriously creeping me out. submitted by /u/Alex_Havok_Summers [link] [comments]

Where does the energy go if there's no load on a solar panel? Posted: 17 Oct 2017 12:02 AM PDT If there is no load on a solar panel, theoretically there is little/no work being done, so where does the incoming light energy go after hitting the solar panel? I don't see solar panels becoming more reflective if there is no load... submitted by /u/phiiscool [link] [comments]

Why do some fruits have multiple seeds while others have just 1? Posted: 16 Oct 2017 09:09 PM PDT A watermelon has hundreds of seeds but a mango only has one, what is the reason behind this? Is it because a single mango sees had a higher chance of turning into a plant than a single watermelon seed? Is it because watermelon seeds are smaller? If so, why do seeds have different sizes? submitted by /u/justcallmesomethig [link] [comments]

Would a black hole really appear as a sphere like in Interstellar? Posted: 16 Oct 2017 06:51 AM PDT submitted by /u/lacylila [link] [comments]

What do trig functions with h mean? i.e sinh(x) Posted: 16 Oct 2017 11:56 PM PDT I looked it up and it had something to do with being hyperbolic. But I honestly don't understand what that means. Also how do they relate to regular trig functions? Can they be interchanged? Lastly how do integrals have to do with them and why haven't I learned about this earlier in Calc 1? submitted by /u/ilikebutteryfries [link] [comments]

How did the pioneers of nuclear science in the 1930s detect different elements during their discovery of fission? Posted: 16 Oct 2017 07:15 PM PDT I'm reading about Dr. Otto Hahn's , Dr. Lise Meitner's and Dr. Fritz Strassman's experiment where they discovered fission when they bombarded uranium with neutrons. They confirmed their hypothesis when they detected barium and krypton, the byproducts of splitting uranium. There are so many amazing things about this experiment but one has me absolutely puzzled: How does one detect specific elements with 1938 technology? submitted by /u/fat_tire_fanatic [link] [comments]

Nuclear power plants, how long could they run by themselves after an epidemic that cripples humanity? Posted: 15 Oct 2017 07:42 AM PDT We always see these apocalypse shows where the small groups of survivors are trying to carve out a little piece of the earth to survive on, but what about those nuclear power plants that are now without their maintenance crews? How long could they last without people manning them? submitted by /u/Marius423 [link] [comments]

How was the height of Mt. Everest measured with reasonable accuracy by surveyors of the Great Trigonometric Survey back in 1852? Posted: 15 Oct 2017 09:30 PM PDT submitted by /u/marderapc [link] [comments]

Do dolphins have groups of communities (different pods) that have a web of a community like we do via the work we do or the things we like to do? Do pods ever meet up to play? Posted: 16 Oct 2017 08:56 PM PDT submitted by /u/littlebugaboo12 [link] [comments]

How does stress influence drug reactivity? Posted: 16 Oct 2017 03:37 PM PDT Took a peak at my alma mater's Neuroscience department page out of curiosity, and something stuck out to me. Stress and its influence on drug reactivity is something that is/was at one point studied thoroughly. From a neurological and/or physiological standpoint, what role does stress play as it relates to how drugs react within the body? submitted by /u/gettingmyenergyback [link] [comments]

How do fractional derivatives work? Posted: 16 Oct 2017 05:35 PM PDT Highschool student here, a month in to my first semester of BC calculus. The other day our class did an activity in which we generalized derivatives of functions to the nth degree, which lead me to question what happens when n is not a whole number. What happens when you plug in fractional, irrational or unreal values to that generalized formula? What will the resulting graph represent? submitted by /u/PantheonYan [link] [comments]

What makes body parts tingle when they fall asleep or cut off circulation? Posted: 15 Oct 2017 07:35 PM PDT submitted by /u/beesmaster [link] [comments]

Do other animals appreciate art? Posted: 16 Oct 2017 07:43 PM PDT Are humans the only animal that have a sense of appreciation for objects whose entire purpose is to be aesthetically pleasing? Or can animals understand decoration and art? Similarly, what do we know about animals creating art? What about music? submitted by /u/Cabanarama_ [link] [comments]

In a can of soda, is the air pressure uniformly distributed throughout the can, or is there some imbalance of pressure near where the gas is? Posted: 16 Oct 2017 05:39 PM PDT I had a bet with a friend that since pressure is exerted on a surface by gas, that there would be imbalance. submitted by /u/throwingawaybro123 [link] [comments]

Why Does Space Smell Like Burning Metal? Posted: 16 Oct 2017 11:23 AM PDT In his recent AMA Scott Kelly said that space smells like burning metal. What would cause this? submitted by /u/PintRocker [link] [comments]

Is the Yellowstone Caldera going to erupt in our lifetime? Posted: 16 Oct 2017 09:50 PM PDT https://mobile.nytimes.com/2017/10/10/science/yellowstone-volcano-eruption.html?referer=https://www.google.com/ There have been several articles circulating around claiming that the Yellowstone Super Volcano is now due to erupt within "a few decades". Is this true? Bonus points: As someone who lives in Boston and family in NJ, what are the chances for survival? submitted by /u/ajw1899 [link] [comments]

Is the energy of an object depleted if it reaches the center of a gravity well? Posted: 16 Oct 2017 09:26 PM PDT In Secondary school, I was taught that if you lift an object, you are increasing it's potential energy and when you drop it the potential energy is released. Based on that, I am curious that if you take an object in space and drop it into a powerful enough gravity well, will it loses all it's energy when reaching the center? Also is there a 'default' amount of energy in objects? It would seem that an object on Earth has less potential energy than an object of equivalent in space. submitted by /u/ykcmaster [link] [comments]

Is it just a coincidence or a specific reason why several elements in the same group have the atomic weight/number of protons increased by 8, 18, or 32 to form the next element in the group? Is there a mathematical formula that uses atomic weight to determine its properties? Posted: 16 Oct 2017 12:11 PM PDT submitted by /u/fromRonnie [link] [comments]

How serious of an issue is radon in basements? Posted: 16 Oct 2017 11:06 AM PDT I always see advertisements for costly radon mitigation systems for basements. Is this a serious issue? Do certain parts of the world have a higher rate of it? If it is an issue for a basement, why wouldn't it be an issue in the rest of the house or for houses without basements ? submitted by /u/Genkiotoko [link] [comments]

Why did Eris, the dwarf planet that caused Pluto to get demoted, only get discovered in 2005? Posted: 16 Oct 2017 09:05 AM PDT submitted by /u/nwidis [link] [comments]

How do devices that utilize electron beams generate the free electrons, and why doesn't that cause a buildup of positive charge that interferes with its function? Posted: 16 Oct 2017 10:50 AM PDT Things like electron microscopes, or mass spectrometers. It seems like if you're ejecting electrons, you'd be building up positive charge that should then prevent further electron ejection. submitted by /u/PatAunces [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: European Southern Observatory announcement concerning groundbreaking observations.

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• AskScience AMA Series: European Southern Observatory announcement concerning groundbreaking observations.
• How do we know the measurement of subatomic particles from each other? I've heard the analogy of the nucleus of an atom being the size of a football or a grape then the electrons would be so many kilometers away, specifically I want to know how we came to figure these relative distances.
• Why aren't there nuclear powered cruise ships and shipping vessels?
• How fast would an indestructable 50c euro coin have to go to destroy earth on impact?
• Do the ocean/lakes/rivers provide extra protection to creatures living underwater from UV radiation from the sun? (Besides just the ozone layer for land creatures)
• If our sun was to go supernova, what would kill us first?
• Would the supposed "floor tile energy generators" actually work?
• How do scientists believe that Phobos and Deimos are captured asteroids from the belt? How does this happen?
• Electrodeposition deposition of iron from iron oxide for mars mission?
• would a flag on a flying spaceship flap or would it stay in the same position?
• If my iPhone is connected to a Bluetooth speaker, does the volume level on the iPhone impact the amount of power being consumed by the iPhone?
• Would The Fires In California Go Out By Themselves?
• Why do we believe Electrons are magnetic dipoles?
• In rocketry, why are grid fins more aerodynamic than traditional fins at supersonic speeds?
• What's the shape and plane of the Magallenic Clouds's orbit of the Milky Way? Where are they, in relation to Earth?
• Is there an advantageous reason to preheating an oven before cooking something? Does the food cook differently entering at a higher temperature rather than raising with the oven?
• What allows humans to control gravity in an enclosed area?
• What determines whether a white dwarf ignites a classical nova, or a type IA supernova after it has accumulated enough mass?
• Does agitating a fluid increase its temperature?
• How does a tsunami affect a small island or atoll in the middle of an ocean?
• How do flies keep up with a moving vehicle inside?
• How would a mission to Planet Nine work?
• Can the coefficient of kinetic friction be greater than 1 or less than 0?

AskScience AMA Series: European Southern Observatory announcement concerning groundbreaking observations. Posted: 15 Oct 2017 07:00 PM PDT ESO announces observations of an astronomical phenomenon that has never been witnessed before. The session will take place after ESO's press conference on 16 October 2017 at 16:00 CEST (10 AM ET), which can be watched live at www.eso.org/live. Summary ESO's fleet of telescopes in Chile have detected the first visible counterpart to a gravitational wave source. These historic observations suggest that this unique object is the result of the merger of two neutron stars. The cataclysmic aftermaths of this kind of merger — long-predicted events called kilonovae — disperse heavy elements such as gold and platinum throughout the Universe. This discovery, published in several papers in the journal Nature and elsewhere, also provides the strongest evidence yet that short-duration gamma-ray bursts are caused by mergers of neutron stars. Besides the science, the collaborative global effort to make this discovery possible was also very interesting. On 17 August 2017 a gravitational wave event was detected. About two seconds later, two space observatories detected a short gamma-ray burst from the same area of the sky. As night fell in Chile ESO's telescopes as well as many others, peered at this patch of sky, pinpointing the source in visible and infrared light. Observations continued as night arrived in Hawaii, as well as for weeks after around the globe. Details on the discovery can be read here: https://www.eso.org/public/news/eso1733/ Guests: Stephen Smartt, Professor of Mathematics and Physics at the Queen's University Belfast. He can take questions on the electromagnetic event, kilonova, r-process, chemical enrichment, heavy elements, telescopes and surveys, finding kilonovae. Joe Lyman, Post-doctoral researcher at the University of Warwick. He can take questions on the host galaxy and environment of the kilonova, as well as the observations done at ESO's La Silla Observatory. Marina Rejkuba, Associate Astronomer at the European Southern Observatory and head of ESO's User Support Department. She can take questions on ESO, telescopes, instruments, and generally the observations carried out for this event. Andrew Levan, Professor of Physics at the University of Warwick. He can take questions on neutron star mergers and electromagnetic follow-up from gamma-ray to radio, observations from the facilities of the European Southern Observatory and the Hubble Space Telescope. Prof. Paolo A. Mazzali, Astrophysics Research Institute, Liverpool John Moores University and Max-Planck Institute for Astrophysics. He can take questions on the merger event, its origin, its ejecta, and interpretation of the ESO spectra. Avneet Singh, Doctoral researcher, Max-Planck-Institut für Gravitationsphysik (Albert-Einstein-Institut). He can answer questions on sources and searches for gravitational waves, general relativity, cosmology and physics of extreme matter. Alex Nitz, Postdoctoral researcher, Max-Planck-Institut für Gravitationsphysik, Albert-Einstein-Institute. He can answer questions on the design of gravitational-wave instruments, the theory behind gravitational waves, gravitational waves from compact binary mergers, how we find signals, and measure their astrophysical parameters. We have been involved in this discovery, either operating ESO's telescopes when the event happened or analysing the data received and drawing the conclusions. We'll be on starting at 18:30 CEST/12:30 ET. AMA! submitted by /u/AskScienceModerator [link] [comments]

How do we know the measurement of subatomic particles from each other? I've heard the analogy of the nucleus of an atom being the size of a football or a grape then the electrons would be so many kilometers away, specifically I want to know how we came to figure these relative distances. Posted: 15 Oct 2017 04:33 PM PDT submitted by /u/lsdmthcosmos [link] [comments]

Why aren't there nuclear powered cruise ships and shipping vessels? Posted: 15 Oct 2017 11:56 AM PDT The largest vehicles in the world emit the most pollution. A cruise ship is equal to a million cars a day. The cargo ships and oil tankers are already a threat to the environment just by their cargo let alone their pollution. Large ships, capable of hauling oil rigs or multiple cargo ships, are an order of magnitude worse. Why not use nuclear power and electric? submitted by /u/sheepsleepdeep [link] [comments]

How fast would an indestructable 50c euro coin have to go to destroy earth on impact? Posted: 15 Oct 2017 02:45 PM PDT If it is at all possible. Wikipedia for coin https://en.wikipedia.org/wiki/50_cent_euro_coin submitted by /u/DMCofSourcefed [link] [comments]

Do the ocean/lakes/rivers provide extra protection to creatures living underwater from UV radiation from the sun? (Besides just the ozone layer for land creatures) Posted: 15 Oct 2017 07:03 PM PDT submitted by /u/Smorlicious [link] [comments]

If our sun was to go supernova, what would kill us first? Posted: 15 Oct 2017 11:02 AM PDT I know our sun is too small, but the thought of it happening raises thoughts. I once read that the light from a supernova would be so bright it would be like the Hiroshima bomb detonating against our eyeball, but would that be enough to kill us all before the rest of the exploding star reached us? submitted by /u/TheMavic [link] [comments]

Would the supposed "floor tile energy generators" actually work? Posted: 15 Oct 2017 02:16 PM PDT This is what I'm talking about: http://www.pavegen.com/about submitted by /u/Flareblood [link] [comments]

How do scientists believe that Phobos and Deimos are captured asteroids from the belt? How does this happen? Posted: 15 Oct 2017 12:20 PM PDT It's not that I don't believe it, it's that I'm not quite sure how it's possible. I was reading an article that stated scientists believe that Mars' two moons are captured asteroids from the belt. How does a planet just capture an asteroid? If this was possible, wouldn't all the asteroids that come near Earth be moons if this was a thing? Perhaps I'm in the wrong subreddit. Maybe it should be in /r/explainlikeimfive but I suppose it's still relevant here. Edit: How can they rule out the fact that something could have hit Mars, something big, and caused chunks of it to go into space (similar to Earth's Moon forming theory). submitted by /u/Aaronpierce1 [link] [comments]

Electrodeposition deposition of iron from iron oxide for mars mission? Posted: 15 Oct 2017 11:11 PM PDT Ok, so out of curiosity i have been trying to figure out how a martian colony could operate without continuous support from earth which would cost trillions. A significant problem i have encountered is the lack of carboneous material to smelt ore with. Can any other method like galvanic processes be used to make metal out of ore? Would it be practical? What chemicals would need to be producable by the martian colony to make it feasible? submitted by /u/RavingElephant [link] [comments]

would a flag on a flying spaceship flap or would it stay in the same position? Posted: 15 Oct 2017 12:10 PM PDT sorry for the badly worded question, but I'm half cut and will forget my question by the morning :) submitted by /u/DrPuffinStuff [link] [comments]

If my iPhone is connected to a Bluetooth speaker, does the volume level on the iPhone impact the amount of power being consumed by the iPhone? Posted: 15 Oct 2017 01:52 PM PDT submitted by /u/Trickykids [link] [comments]

Would The Fires In California Go Out By Themselves? Posted: 15 Oct 2017 04:30 PM PDT If there weren't any firefighters there, would the fires in California eventually go out by themselves? I know that they would eventually consume all the fuel they had and go out because of that, but would they reach that level and consume the forests of California first? Or would something else naturally stop them? submitted by /u/IWillEatYourChildren [link] [comments]

Why do we believe Electrons are magnetic dipoles? Posted: 16 Oct 2017 12:04 AM PDT From what I've read over the years, it seems like a lot of the really random parts of quantum mechanics that don't just come down to wave mechanics revolve around the idea that electrons and other charged particles are dipoles that only ever point directly at whatever they're interacting with. My question is, how do we know that's the case? Wouldn't it work exactly the same if they were just magnetic monopoles with opposite signs? submitted by /u/chunkylubber54 [link] [comments]

In rocketry, why are grid fins more aerodynamic than traditional fins at supersonic speeds? Posted: 15 Oct 2017 12:50 PM PDT I've read the length required from a traditional fin to attain the same control as a grid fin causes more drag than the grid fin. This seems counter intuitive because grid fins have larger frontal areas. submitted by /u/staytrue1985 [link] [comments]

What's the shape and plane of the Magallenic Clouds's orbit of the Milky Way? Where are they, in relation to Earth? Posted: 15 Oct 2017 12:43 PM PDT submitted by /u/T2QTIW31hmtGbNsq [link] [comments]

Is there an advantageous reason to preheating an oven before cooking something? Does the food cook differently entering at a higher temperature rather than raising with the oven? Posted: 15 Oct 2017 04:59 PM PDT submitted by /u/TanglyMango [link] [comments]

What allows humans to control gravity in an enclosed area? Posted: 15 Oct 2017 07:58 AM PDT I saw the video of Stephen Hawking on zero gravity. What do they have to do to make the conditions right for zero gravity? submitted by /u/cocidlc [link] [comments]

What determines whether a white dwarf ignites a classical nova, or a type IA supernova after it has accumulated enough mass? Posted: 15 Oct 2017 12:07 PM PDT I even heard the same white dwarf can go a classical nova (a few times) before eventually going supernova. My common sense says one would prevent the other from happening. Why not? submitted by /u/empire314 [link] [comments]

Does agitating a fluid increase its temperature? Posted: 15 Oct 2017 04:56 PM PDT I understand temperature as the average motion of the atoms in an object, so does agitating a fluid increase the total motion and therefore the temperature? submitted by /u/Gfd_Rewq [link] [comments]

How does a tsunami affect a small island or atoll in the middle of an ocean? Posted: 15 Oct 2017 04:48 PM PDT If I was on a small atoll or island in the middle of an ocean, and a tsunami was headed my way, would the wave stay small or would the wave become the size they are when they hit mainland? submitted by /u/Zedloaf [link] [comments]

How do flies keep up with a moving vehicle inside? Posted: 15 Oct 2017 08:33 PM PDT Okay before I start this, I wanna point out that I'm absolutely terrible at explaining things and I'm currently running on 1.5 hours sleep, also mixed with the fact I failed year 11 physics, so bear with me. Due to inertia, we need to stay seated while in a vehicle. For example, I'm on a bus and I need to sit down and "attach" myself to the bus so that I move with the bus. However, flies, well... Fly. They don't sit. So they're just in a big room of air. Much like if you had a dangling light hanging from the ceiling of a bus for example, if you're sitting at a set of lights and then speed up, the lights will go backwards towards the back of the bus because they're still trying to rest at 0km/h. So my question is, if a bus is travelling at say 40km/h, does a fly need to be flying at 40km/h to keep up? If not, why? submitted by /u/Sheepzor [link] [comments]

How would a mission to Planet Nine work? Posted: 15 Oct 2017 07:09 PM PDT Assuming for a moment that Planet Nine exists, and is more or less like experts predict (~10 Earth masses, orbital period of ~15,000 years), do we currently have the technology to land a probe on it? What would the mission look like? What's the most exciting thing we could learn? submitted by /u/5tring [link] [comments]

Can the coefficient of kinetic friction be greater than 1 or less than 0? Posted: 15 Oct 2017 07:02 PM PDT submitted by /u/Tethered_ [link] [comments]

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