How does the area of a black hole's event horizon change with respect to its mass increase?

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• How does the area of a black hole's event horizon change with respect to its mass increase?
• How populated was the earth with Dinosaurs during the Triassic, Jurassic, Cretaceous periods?
• Can somebody explain the wall effect in a ball-drop viscometer?
• How can our brains be so energy efficient when compared to computers, and why do they not overheat?
• Why does latent heat of phase change exist?
• Is the Hydronium ion just as likely to occur as Ammonium Ion during a basic water and ammonia reaction?
• In order to escape a predator, a prey animal that moves in a herd does not have to outrun the predator to survive - just the rest of the herd. Are there any species that are known to sabotage one another while fleeing a predator to ensure their own survival?
• whats the deal with the reaction we have when we hear scratching on a chalkboard or a fork across the plate. Why do we do the thing we do? Also why does simply thinking about it sometimes trigger it?
• What would the earth look like with a 0-degree axial tilt?
• What is the theoretical limit of CPU speed?
• How can you reduce power of microwave oven?
• Can someone explain hair to me?

How does the area of a black hole's event horizon change with respect to its mass increase? Posted: 07 Sep 2018 06:45 PM PDT I understand that the mass of a black hole increases by the same amount of the in-falling mass. Is the (spherical?) surface of the event horizon simply related to the BH's mass as it is to its "volume?" In other words, if the BH were a physical object made of some non-compressible material, say water, for every extra drop that joined the BH its volume, and therefore surface, would increase by a given amount. Double the mass/volume and the surface would increase by (I think) 2/3. ​ Is that the same in an actual BH? ​ Is the event horizon always spherical? Even in rotating BHs? submitted by /u/wearsAtrenchcoat [link] [comments]

How populated was the earth with Dinosaurs during the Triassic, Jurassic, Cretaceous periods? Posted: 07 Sep 2018 08:29 AM PDT If I were to DeLorean back to the age of the Dinosaurs, what would my chances of seeing a small/medium/large dinosaur in any encounter? Would driving anywhere be like a safari in Africa or would you really have to seek out the creatures? How different was the Triassic, Jurassic, and Cretaceous periods? submitted by /u/coolmandan03 [link] [comments]

Can somebody explain the wall effect in a ball-drop viscometer? Posted: 08 Sep 2018 02:48 AM PDT submitted by /u/satwritinglad [link] [comments]

How can our brains be so energy efficient when compared to computers, and why do they not overheat? Posted: 07 Sep 2018 08:14 AM PDT submitted by /u/SlimesWithBowties [link] [comments]

Why does latent heat of phase change exist? Posted: 07 Sep 2018 02:53 PM PDT TL;DR I think my biggest problem is I don't know where the latent heat is stored, if not in the combined minute motion of the molecules and atoms (temperature). Is it the fact that a substance gradually converts to the new phase? Like when boiling water, the water sits at boiling temp while the most energetic molecules fly out, keeping the water at constant temperature? But if those steam molecules are still considered part of the overall volume of water being measured, and temperature is the average kinetic energy of the molecules, they would increase the temperature, so I assume that's not the case, as (thermal energy, temperature) graphs show a clear plateau at each phase change. Do gas and liquid molecules contribute less of their kinetic energy to temperature than the molecules in a solid? Or does this gradual conversion to steam not happen until the temperature passes the latent heat plateau? If so, back to my TL;DR: where does the latent heat go so that it comes back with the opposite phase change? If it is related to entropy, I would also like an explanation of that. I know gas cools as it expands and rubber bands cool down when they stop stretching, both of which I've heard explained with entropy, but it still doesn't make sense to me. submitted by /u/Overtime_Lurker [link] [comments]

Is the Hydronium ion just as likely to occur as Ammonium Ion during a basic water and ammonia reaction? Posted: 07 Sep 2018 10:27 AM PDT This is probably a simple question but I'm struggling with understanding basic trends in chemical reactions. The equation in question: "NH3 + H2O = NH4+ + OH-" Why is the ammonium ion and hydroxide the product of this (reversible) reaction? Why does the hydrogen pair with the nitrogen over the oxygen? Is H3O+ also created in a lesser quantity? Is it related to oxygen being more electronegative than nitrogen? Thanks submitted by /u/Next_Mushroom [link] [comments]

In order to escape a predator, a prey animal that moves in a herd does not have to outrun the predator to survive - just the rest of the herd. Are there any species that are known to sabotage one another while fleeing a predator to ensure their own survival? Posted: 07 Sep 2018 05:45 AM PDT submitted by /u/Peach_Muffin [link] [comments]

whats the deal with the reaction we have when we hear scratching on a chalkboard or a fork across the plate. Why do we do the thing we do? Also why does simply thinking about it sometimes trigger it? Posted: 07 Sep 2018 07:26 AM PDT submitted by /u/A_Piece_of_Pai [link] [comments]

What would the earth look like with a 0-degree axial tilt? Posted: 07 Sep 2018 08:10 AM PDT Obviously there would be no seasons, but what else? Would the temperature differences between the equator and the poles be much more severe? submitted by /u/badskeleton [link] [comments]

What is the theoretical limit of CPU speed? Posted: 07 Sep 2018 06:56 AM PDT When it comes to speed we say speed of light is the limit. In similar fashion what would be the maximum of speed of a CPU if only restricted by speed of light? What would be the maximum FPS a video camera can capture pictures? submitted by /u/jarjarbings [link] [comments]

How can you reduce power of microwave oven? Posted: 07 Sep 2018 02:48 PM PDT Isn't the wave energy of a given lenght and frequency constant? How can we reduce the power of a 1000 W microwave? I mean the frequrncy os 2.5 GHz, the wavelength i suppose is constant also. What changes then? What's different in an 600 W and 1000 W microwave oven? submitted by /u/Wermikulit [link] [comments]

Can someone explain hair to me? Posted: 07 Sep 2018 06:42 AM PDT I have a number of questions that all fall under the umbrella of "hair stuff." What causes the different colours? Shape and style? It's a running joke that white barbers don't know how to cut black hair, but why is it different? What's up with old people having bushier eyebrow, ear, and nasal hair? Why is hair where it is on the body, and why is it different lengths, textures, and colours in those places? submitted by /u/FOR_PRUSSIA [link] [comments]

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If the Earth stopped spinning immediatly, is there enough momentum be thrown into space at escape velocity?

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• If the Earth stopped spinning immediatly, is there enough momentum be thrown into space at escape velocity?
• How powerful are satellite signals?
• Why does the F-104 have such small wings?
• Is it possible to know if a molecule is harmful or not by only looking at its structure?
• When you are knocked unconscious are you in the same state as when you fall asleep?
• What sort of distance do we find between binary stars?
• Why don't we sneeze in our sleep?
• Do images taken by Hubble Telescope have the same colors that we see?
• Can we increase the speed of light (greater than its speed in the vacuum) by moving the medium through which it is traversing?
• If you start with 0.5, then add 0.25, then 0.125 and keep adding half of the number you just added, will you ever get to 1?
• Has Earth ever had irregular seasons?
• How does Plan B work on the molecular level? Can it prevent the implantation of an already fertilized blastula?
• Is all Earth's calcium-carbonate reserves produced by living organisms or is there "inorganic chalk"?
• How did STI’s originate?
• Two stars are on a collision path and predicted to explode into a red nova in 2022. Can we say that they've collided since they are 1,843 light years from Earth? How do we talk about events that have happened, but also haven't?
• Gut bacteria is a key part of human digestion. Where do newborn babies get their first gut bacteria from?
• What happens when two tones are played at the same time? Are there waves combined, or are they seperate?
• Are all Eukaryotes capable of developing cancer? (ignoring single celled organisms)
• Is it possible that the color of playing cards affects a players actions in poker?
• Why does plasma create light, when it is just a superheated gas?
• How do we have pictures of our galaxy?
• Why do some animals (like most big cats) kill their prey before feeding on them while others (like Wild Dogs,Baboons) do not mind eating their prey alive?
• Does the earth have weight?

If the Earth stopped spinning immediatly, is there enough momentum be thrown into space at escape velocity? Posted: 06 Sep 2018 11:57 PM PDT submitted by /u/TheHartman88 [link] [comments]

How powerful are satellite signals? Posted: 07 Sep 2018 04:57 AM PDT Satellite signals(ex: TV signals, GPS signals) are beamed from the space and can cover a HUGE area, like a whole country. Since signal intensity goes down as the covered area spread, how powerful are satellite signals to cover such a vast area? submitted by /u/pm_me_for_penpal [link] [comments]

Why does the F-104 have such small wings? Posted: 06 Sep 2018 11:20 AM PDT Is there any advantage to small wings like the F-104 has? What makes it such a used interceptor? submitted by /u/Eta5678 [link] [comments]

Is it possible to know if a molecule is harmful or not by only looking at its structure? Posted: 07 Sep 2018 12:52 AM PDT submitted by /u/1stAndLastPost [link] [comments]

When you are knocked unconscious are you in the same state as when you fall asleep? Posted: 07 Sep 2018 07:11 AM PDT If you are knocked out, choked out, or faint, do you effectively fall asleep or is that state of unconscious in some way different from sleep? I was pondering this as I could not fall asleep and wondered if you could induce regular sleep through oxygen deprivation or something. Not something I would seriously consider trying, but something I was curious about. submitted by /u/Chimp711 [link] [comments]

What sort of distance do we find between binary stars? Posted: 07 Sep 2018 01:18 AM PDT Are they like the sun and Jupiter with room for planets between them or are they spaced more like the sun and Neptune? I can't imagine binaries with planets simply because the orbits would become eccentric and then they would either end up in the star or launched into space. submitted by /u/criostoirsullivan [link] [comments]

Why don't we sneeze in our sleep? Posted: 06 Sep 2018 04:19 PM PDT submitted by /u/DerD4ve [link] [comments]

Do images taken by Hubble Telescope have the same colors that we see? Posted: 06 Sep 2018 08:12 PM PDT IIRC, I read somewhere that the images taken by Hubble Telescope are just black and white. The astronomers or technicians then analyze those images and digitally assign colors to each element according to what spectrum we know it emits. Is that true? And if we are in space now, can we see the universe as colorful as we see in images? Why or why not? submitted by /u/tenkensmile [link] [comments]

Can we increase the speed of light (greater than its speed in the vacuum) by moving the medium through which it is traversing? Posted: 06 Sep 2018 10:55 PM PDT I was recently trying to grasp the idea of special relativity, the notion of aether and Michelson-Morley experiment and I am wondering that if it would be possible to break the rule of constancy of light speed by a fast moving medium. I know that a moving medium affects the perceived speed of the wave by a stationary observer. Assuming light to be a wave (don't know if the duality comes into play here?) and passing it through a medium (say glass for example) and moving the medium say at a speed 'v' with respect to a stationary observer. Now as the medium is moving with respect to the observer with speed 'v' wouldn't he observe the speed of light to be as 'c+v' (assuming the direction of the velocity of moving medium is same as that of the propagating light wave)? I am assuming here that 'c' is the speed of light in glass (less than what it is in vacuum). But if 'v' is large enough we may cross the speed of light in vacuum? Its just that I can't seem to figure out why this won't work out, any insight as to where I may be going wrong would greatly help me! submitted by /u/ClarkDale123 [link] [comments]

If you start with 0.5, then add 0.25, then 0.125 and keep adding half of the number you just added, will you ever get to 1? Posted: 07 Sep 2018 04:09 AM PDT submitted by /u/DismalAlternative [link] [comments]

Has Earth ever had irregular seasons? Posted: 06 Sep 2018 07:10 PM PDT submitted by /u/thrill_gates [link] [comments]

How does Plan B work on the molecular level? Can it prevent the implantation of an already fertilized blastula? Posted: 07 Sep 2018 07:26 AM PDT I am aware that the primary mechanism by which Plan B works is through preventing fertilization in the first place, mainly by preventing ovulation. However, I have read that in the even that the egg *is* fertilized, Plan B can prevent it from implanting in the uterus. I am curious by what mechanism the drug actually works to prevent fertilization, or, if that does not work, prevent implantation. ​ Also, I am aware that many fertilized eggs fail to implant naturally, so I assume that by "preventing it from implanting" sources mean that they increase the likelihood that implantation will fail to occur. How much more likely is it with taking Plan B than without? submitted by /u/fireballs619 [link] [comments]

Is all Earth's calcium-carbonate reserves produced by living organisms or is there "inorganic chalk"? Posted: 07 Sep 2018 06:04 AM PDT To my knowledge, all chalk depots of the world is residue from microorganisms that formed shells around them. The question is important in the search for extraterrestrial life, because Earth's chalk reserves binds massive amounts of CO2, which prevents the planet from looking like Venus, which is a runaway greenhouse disaster. If both calcium-carbonate, and - obviously - fossil carbon is a product of living organisms, then there appears to be no natural processes that diminishes CO2 levels on an otherwise Earth-like planet. Carbon control would have to be a result of life, never the other way around. submitted by /u/h4tt3n [link] [comments]

How did STI’s originate? Posted: 06 Sep 2018 09:37 PM PDT I saw a post about it and I'm wondering how the first infection was transmitted? Obviously you can get a disease or infection without sex but if so, why are they dubbed sexually transmitted infections and why aren't people getting them without sex now outside of the occasional toilet seat etc? submitted by /u/calebisthemanby [link] [comments]

Two stars are on a collision path and predicted to explode into a red nova in 2022. Can we say that they've collided since they are 1,843 light years from Earth? How do we talk about events that have happened, but also haven't? Posted: 06 Sep 2018 05:20 PM PDT I am referring to the contact binary KIC 9832227. https://en.wikipedia.org/wiki/KIC_9832227 submitted by /u/00fruit [link] [comments]

Gut bacteria is a key part of human digestion. Where do newborn babies get their first gut bacteria from? Posted: 06 Sep 2018 03:24 PM PDT Do they have gut bacteria in the womb? Does it come through the breastmilk from mom? Does it come from bacterial contamination in their first solid food? Is is typical for fathers/siblings/other people commonly around a baby to transfer their gut bacteria to the baby? submitted by /u/PokerPirate [link] [comments]

What happens when two tones are played at the same time? Are there waves combined, or are they seperate? Posted: 06 Sep 2018 05:32 PM PDT For example, if a speaker were to play an A and a C, would there physically be two waves at 440 and at 523.25, or would it just be one wave encoding a minor third from A? submitted by /u/Da_Gr8_M8 [link] [comments]

Are all Eukaryotes capable of developing cancer? (ignoring single celled organisms) Posted: 06 Sep 2018 11:22 PM PDT submitted by /u/falconstar16 [link] [comments]

Is it possible that the color of playing cards affects a players actions in poker? Posted: 06 Sep 2018 09:05 PM PDT Like how red shirts make people look more sexual, or how room designers pick colors for certain activities. Interest was piqued because I've got a fire red/white deck, and a moonlight blue/black deck and they are so far contrasted that I couldn't help but consider the question. submitted by /u/Jribs52 [link] [comments]

Why does plasma create light, when it is just a superheated gas? Posted: 06 Sep 2018 05:56 PM PDT I understand that most extremely hot things create light, and that plasma is just gas that gets so hot that atoms start to fall apart, but why do very hot things and exothermic reactions create light? submitted by /u/Syndr1l [link] [comments]

How do we have pictures of our galaxy? Posted: 06 Sep 2018 01:54 PM PDT How do we have pictures of our galaxy? We might not even have a picture of it as far as I know. I ask this question because I see a picture now and again of the Milky Way with an arrow pointing to our star. I know we can see other galaxies outside of our own but when you see a picture of our own galaxy, how is that possible? submitted by /u/Christafarian666 [link] [comments]

Why do some animals (like most big cats) kill their prey before feeding on them while others (like Wild Dogs,Baboons) do not mind eating their prey alive? Posted: 07 Sep 2018 12:19 AM PDT submitted by /u/Tedmosbie [link] [comments]

Does the earth have weight? Posted: 06 Sep 2018 11:22 PM PDT Does the earth weigh anything? If weight is determined by the gravity of our planet, all directed to the exact center of the core then what would give the earth itself, floating in space, any weight? I know you can calculate mass but conceptually how can the planet have weight with no reference to any gravitational pull? submitted by /u/Tech22485 [link] [comments]

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Besides lightning, what are some ways that fire can occur naturally on Earth?

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• Besides lightning, what are some ways that fire can occur naturally on Earth?
• How are sutures dissolved if they are made of chitin and if chitin has beta-glycosidic bonds like cellulose?
• If we manage to confine air in a space with no perturbation (wind, sudden temperature changes, etc), will the heavier molecules sink to the bottom?
• Why are so many recently discovered expolanets gas giants? Since the first few planets in our solar system are rocky worlds, are we normal or weird?
• Do emotion-related increases in heart rate increase metabolism the same way aerobic exercise does?
• What causes the ear to "pop" during a rise or fall of elevation ?
• Why doesn't atoms nuclei collapse?
• Do objects fall at the same rate in a uniform electric field, the way they do in a uniform gravitational field?
• If there was no moon, would there be waves?
• Would the sun noticeably dim if it were 'eclipsed' by Venus or Mercury?
• After the Chicxulub impactor struck the Earth how long did it take for the last non-semi-aquatic tetrapods that were ~25kg to die?
• Ask Anything Wednesday - Biology, Chemistry, Neuroscience, Medicine, Psychology
• How did we discover the chemical composition of the sun?
• Can dogs recognize their siblings (different litter but same genetic parents) through scent when introduced?
• Do primates who menstruate experience similar symptoms (mood change, cramping, wanting certain types of food) that human females do?
• Do our lungs fill evenly when we breathe?

Besides lightning, what are some ways that fire can occur naturally on Earth? Posted: 05 Sep 2018 06:25 PM PDT submitted by /u/PayYourSurgeonWell [link] [comments]

How are sutures dissolved if they are made of chitin and if chitin has beta-glycosidic bonds like cellulose? Posted: 06 Sep 2018 06:47 AM PDT submitted by /u/fornoggg [link] [comments]

If we manage to confine air in a space with no perturbation (wind, sudden temperature changes, etc), will the heavier molecules sink to the bottom? Posted: 05 Sep 2018 06:29 PM PDT Just wondering. Also, if brownian motion keeps the system homogeneous, would a decrease in the temperature of the system decrease it enough to achieve a seperation of gases? Not sure if it's an adequate question. Couldn't find much online (or maybe I suck at looking it up). submitted by /u/BigEnoughForLDR [link] [comments]

Why are so many recently discovered expolanets gas giants? Since the first few planets in our solar system are rocky worlds, are we normal or weird? Posted: 05 Sep 2018 08:15 PM PDT submitted by /u/JasontheFuzz [link] [comments]

Do emotion-related increases in heart rate increase metabolism the same way aerobic exercise does? Posted: 05 Sep 2018 06:15 PM PDT I am wondering whether non-exericse increases in heart rate (e.g., high heart rate during an anxiety attack or following smoking) affects metabolism in a way proportionate to increased metabolism during exercise. Or is the increase seen in exercise solely from using one's muscles? submitted by /u/dysflymia [link] [comments]

What causes the ear to "pop" during a rise or fall of elevation ? Posted: 05 Sep 2018 06:04 PM PDT submitted by /u/commandercody95 [link] [comments]

Why doesn't atoms nuclei collapse? Posted: 05 Sep 2018 05:43 PM PDT I'm not talking about the reason electrons don't crash into the atom nucleus. The question I'm asking is, if the strong nuclear force is that much stronger than the electromagnetic force at the distances of a atom nucleus, why does it have a radius? submitted by /u/throwwwwwaway_123 [link] [comments]

Do objects fall at the same rate in a uniform electric field, the way they do in a uniform gravitational field? Posted: 05 Sep 2018 11:44 AM PDT In a gravity-free environment, If we had a theoretical planet that had no gravitational field but did have an electric field (let's say positively charged) and we dropped objects with equal negative charges that weighed different amounts onto it, would those objects fall at the same rate? submitted by /u/massivebrain [link] [comments]

If there was no moon, would there be waves? Posted: 05 Sep 2018 07:58 AM PDT And if there was no moon would there be life? I feel like the moon gently agitated the ocean and brought life together. Do planets need water and a moon for life? submitted by /u/LunchMasterFlex [link] [comments]

Would the sun noticeably dim if it were 'eclipsed' by Venus or Mercury? Posted: 05 Sep 2018 01:12 PM PDT submitted by /u/sacrelicious2 [link] [comments]

After the Chicxulub impactor struck the Earth how long did it take for the last non-semi-aquatic tetrapods that were ~25kg to die? Posted: 05 Sep 2018 11:19 AM PDT submitted by /u/Sitervain [link] [comments]

Ask Anything Wednesday - Biology, Chemistry, Neuroscience, Medicine, Psychology Posted: 05 Sep 2018 08:12 AM PDT Welcome to our weekly feature, Ask Anything Wednesday - this week we are focusing on Biology, Chemistry, Neuroscience, Medicine, Psychology 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]

How did we discover the chemical composition of the sun? Posted: 05 Sep 2018 07:58 AM PDT I'm asking about the experimental methods we used to determine the chemical composition of the sun by mass... I know it has something to do with emission/absorption spectroscopy but fail to grasp the full concept behind it submitted by /u/ryamminumber1 [link] [comments]

Can dogs recognize their siblings (different litter but same genetic parents) through scent when introduced? Posted: 04 Sep 2018 07:28 PM PDT My family is adopting another puppy from the same breeder (both have the same parents but this one is from a more recent litter) and I am curious if our current dog will recognize that he is genetically similar. I've learned about human pheromones and attraction based on non-overlapping immune makeup and I was curious if this potentially translated to dogs considering their heightened smell capabilities. submitted by /u/Jrdruva [link] [comments]

Do primates who menstruate experience similar symptoms (mood change, cramping, wanting certain types of food) that human females do? Posted: 04 Sep 2018 05:09 PM PDT submitted by /u/DiceMorgansGhost [link] [comments]

Do our lungs fill evenly when we breathe? Posted: 04 Sep 2018 07:04 PM PDT The pressure in the lungs upon inhaling will be the same, but are the factors that cause one lung to be smaller than the other or do they expand together and at the same rate?? submitted by /u/koomzzy [link] [comments]

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