Can stars exist that are arbitrarily close to becoming a black hole?

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• Can stars exist that are arbitrarily close to becoming a black hole?
• If gravity "travels" as a wave, does it move at the speed of light?
• Why don't solids sublimate in space?
• If a person is a blood-type match for a blood transfusion, would they also be a match for bone marrow or organ donation?
• Are protons from different elements identical?
• Why do some chemical elements with a higher atomic number than the preceding element have a lower weight? (E.g. Argon has atomic number 18 and weight 39.948, and Potassium has atomic number 19 and weight 39.0983.)
• Why aren't there any medical uses of exoenzymes?
• [Computing] How to compute the determinant of a large matrix with optimal precision?
• Salt Water Crocodiles are said to have changed very little since 'dinosaurs roamed the earth,' is this exclusively because of their apex position in the food chain, or do their offspring show a lower rate of genetic mutation?
• Why do hard drives not hold their specified storage amount?
• Could black holes have been predicted using Newton's laws?
• Are there any animals that make tools for the purpose of improving or refining other tools?
• Do people with hyperthymesia remember dreams better than the average person?
• What is the evidence for circular indentations in the front of frills of ceratopsians?
• How does the human body notice that you have digested foul or poisonous food & how long does it take to launch countermeasures?
• (Mathematics) Does the sum of all real numbers equal -1\12?
• [physics] Assuming earth was a perfect sphere, how far off the surface would the light have to pass in order to orbit it?
• Does white noise have any effect on concentration or memory?
• If 0*0=0, wouldn't that mean that 0=0/0?
• How do we know that action must be least ( stationary ) ?

Can stars exist that are arbitrarily close to becoming a black hole? Posted: 29 Oct 2016 10:21 PM PDT That is, can the radius of a star be arbitrarily close to the Schwarzchild radius for its mass? Or is there a certain radius past the Schwarzchild radius below which a stable star cannot exist, and the star must collapse into a black hole? submitted by /u/bolj [link] [comments]

If gravity "travels" as a wave, does it move at the speed of light? Posted: 29 Oct 2016 06:09 PM PDT In science we were all taught that all matter has mass, and thus gravity. That gravity extends across the entire universe, and gets weaker the further you are from the center of mass. So, since LIGO has detected gravitational waves, how fast do those waves move? Do they "travel" at the speed of light and behave the same as any other electromagnetic wave? submitted by /u/MrSquer [link] [comments]

Why don't solids sublimate in space? Posted: 29 Oct 2016 07:38 PM PDT There's basically zero vapor pressure in space so shouldn't things spontaneously turn to gas? submitted by /u/tylerchu [link] [comments]

If a person is a blood-type match for a blood transfusion, would they also be a match for bone marrow or organ donation? Posted: 29 Oct 2016 08:37 PM PDT submitted by /u/bitch-ass_ho [link] [comments]

Are protons from different elements identical? Posted: 29 Oct 2016 06:04 PM PDT Here's what I understand: Atoms are made of protons, neutrons and electrons. What differentiates elements from each other is the number of protons contained within their atoms. E.g.; Hydrogen only has one proton, whereas Neon has 10 protons, Calcium has 20 protons, etc. But here's what I don't get: if you took the proton from an atom of hydrogen, and compared it to a proton taken from Calcium, would they be identical? Put another way, do the subatomic particles of hydrogen have an intrinsic 'hydrogen-ness' to them, or are they entirely interchangeable with the particles of other elements? Could you theoretically remove a proton from a Calcium atom, and replace it with a proton from a Cadmium atom and still have an atom of 'pure' Calcium? Thanks in advance submitted by /u/Roy4Pris [link] [comments]

Why do some chemical elements with a higher atomic number than the preceding element have a lower weight? (E.g. Argon has atomic number 18 and weight 39.948, and Potassium has atomic number 19 and weight 39.0983.) Posted: 29 Oct 2016 02:00 PM PDT Other examples include Thorium with atomic number 90 and weight 232.0377 and Protactinium with atomic number 91 and weight 231.03; Uranium with atomic number 92 and weight 238.02 and Neptunium with atomic number 93 and weight 237; and Bohrium with atomic number 107 and weight 272 and Hassium with atomic number 108 and weight 270. My understanding was that as the atomic number goes up, so does the number of protons, so shouldn't the weight always go up as more protons are added to a nucleus? submitted by /u/BOLDTHUMB [link] [comments]

Why aren't there any medical uses of exoenzymes? Posted: 29 Oct 2016 03:14 PM PDT It seems that some exoenzymes could be really clinically useful in targeting particular kinds of cancer - hyaluronidase, which breaks down the packing tissue between cells, delivered to cancerous tumors was just something that I thought of. Or why not use leukocidins to treat autoimmune disorders? I asked my microbiology professor, and she said she didn't know of any clinical applications, so I thought I'd ask here why/if that's the case. Thanks! submitted by /u/glovesforfoxes [link] [comments]

[Computing] How to compute the determinant of a large matrix with optimal precision? Posted: 29 Oct 2016 08:05 PM PDT For a cluster computing competition a couple years back, the challenge was to compute the determinant of a 5000x5000 square matrix (25,000,000 elements) consisting of double-lengths integers. My original idea was to row reduce the matrix and multiply the diagonal, but that seems like it would run into problems with the sheer quantity of multiplication that would need to occur leading to a reduction of precision. The goal of the competition was to be "accurate" (but that wasn't really defined very well) and to be the quickest to this "accurate" result. What methods would provide a quick and reliable answer, Reddit? submitted by /u/AeroMech08 [link] [comments]

Salt Water Crocodiles are said to have changed very little since 'dinosaurs roamed the earth,' is this exclusively because of their apex position in the food chain, or do their offspring show a lower rate of genetic mutation? Posted: 29 Oct 2016 07:29 AM PDT As in the title, 'lower rate' as compared to higher mammals, which developed more recently. submitted by /u/IAMA_JERK_AMA [link] [comments]

Why do hard drives not hold their specified storage amount? Posted: 29 Oct 2016 07:49 PM PDT I've bought a couple of hard drives for my electronics (i.e. Xbox and PC), but they never hold the correct amount of storage. Example: I bought a 500 gb hard drive for my PC, but it can only hold 232 gigs. Why does this happen? How can I fix this? submitted by /u/Vessure [link] [comments]

Could black holes have been predicted using Newton's laws? Posted: 29 Oct 2016 09:21 AM PDT submitted by /u/DerInselaffe [link] [comments]

Are there any animals that make tools for the purpose of improving or refining other tools? Posted: 29 Oct 2016 09:28 AM PDT I know that tool construction has been observed in animals in the wild (IIRC by Jane Goodall), but that was single construction to get food. What about making a tool to make another tool better? submitted by /u/skurvecchio [link] [comments]

Do people with hyperthymesia remember dreams better than the average person? Posted: 29 Oct 2016 09:29 AM PDT Just curious if the memory loss of dreams is consistent throughout all humans. submitted by /u/An_Actual_Moose [link] [comments]

What is the evidence for circular indentations in the front of frills of ceratopsians? Posted: 29 Oct 2016 09:00 AM PDT Many paleoartists have recently depicted ceratopsians with circle indentations in the front of their frills. There are circular openings in the bone in some cases - in Torosaurus, for example - but what is the evidence for there being indentations in the skin? Also, what is the evidence for the indentations in the front of the snouts that many paleoartists depict? submitted by /u/dgmilner [link] [comments]

How does the human body notice that you have digested foul or poisonous food & how long does it take to launch countermeasures? Posted: 29 Oct 2016 08:33 AM PDT submitted by /u/Phanron [link] [comments]

(Mathematics) Does the sum of all real numbers equal -1\12? Posted: 29 Oct 2016 03:26 PM PDT It was under my impression that you could not do arithmetic with inifinity or infinite sums for that matter, so all the proofs showing that the sum of all numbers equals -1/12 seemed kind of bogus to me. However I've heard that it's very important to string theory, so I'm kind of lost. Does it or doesn't it equal -1/12? Thanks. Edit: some grammars submitted by /u/jobonso [link] [comments]

[physics] Assuming earth was a perfect sphere, how far off the surface would the light have to pass in order to orbit it? Posted: 29 Oct 2016 09:39 AM PDT Basically can light orbit earth and if so, is it possible to detect? Or does the landscape render that outcome void? submitted by /u/Pilotwannabe21 [link] [comments]

Does white noise have any effect on concentration or memory? Posted: 29 Oct 2016 12:43 AM PDT If so, is this effect quantifiable in any way? Are there changes in brain activity when studying with or without the presence of white noise? submitted by /u/Kingkururu [link] [comments]

If 0*0=0, wouldn't that mean that 0=0/0? Posted: 29 Oct 2016 11:50 AM PDT If not clear: 0 (first zero) * 0 (second zero) = 0 (third zero) -> 0 (first zero) = 0 (third zero) / 0 (second zero) submitted by /u/The_Godlike_Zeus [link] [comments]

How do we know that action must be least ( stationary ) ? Posted: 29 Oct 2016 06:00 AM PDT There are a lot of explanations on how to minimize the action and that newtonian and lagrangian mechanics give the same answer, but how do we know that action must be least ? Can it be shown that newtonian mechanics somehow implys that action must be least ? ( sorry for my english ) ? submitted by /u/Coousey [link] [comments]

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We are scientists from the Society of Vertebrate Paleontology coming to you from our annual meeting in Salt Lake City. We study fossils. Ask Us Anything!

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• We are scientists from the Society of Vertebrate Paleontology coming to you from our annual meeting in Salt Lake City. We study fossils. Ask Us Anything!
• Are organelles inside cells actually colored?
• How can there be a speed difference at joining rivers at an Y-shape?
• Why do beavers build dams?
• What happens when a sound wave encounters a vacuum?
• How do chromosomes survive in the cytoplasm during mitosis?
• DNA replication - is the leading strand always built complementary to either the coding strand or the template strand?
• Is there a series that always ends up inconclusive no matter which test you use?
• If there is an absolute zero, is there a finite rate at which a given object's temperature can be lowered?
• What gives the Squid nebula its stretched oval shape?
• Would earphones work in space?
• Is there any instance of an exoplanet orbiting three separate stars, or is this not even possible?
• How do computers keep track of time?

We are scientists from the Society of Vertebrate Paleontology coming to you from our annual meeting in Salt Lake City. We study fossils. Ask Us Anything! Posted: 29 Oct 2016 06:05 AM PDT Hello AskScience! We are members of the Society of Vertebrate Paleontology. We study fossil fish, mammals, amphibians, and reptiles — anything with a backbone! Our research includes how these organisms lived, how they were affected by environmental change like a changing climate, how they're related, and much more. You can learn more about SVP in this video or follow us on Twitter @SVP_vertpaleo. We're at our 76th Annual Meeting in Salt Lake City, Utah. Ask us your vertebrate paleontology questions! We'll be here to answer your questions at 10am Mountain Time/12pm Eastern! submitted by /u/VertPaleoAMA [link] [comments]

Are organelles inside cells actually colored? Posted: 28 Oct 2016 08:27 AM PDT In cell models you can see the organelles colored in certain ways. Are they actually colored like this, or are they colored that way so we can differentiate them. submitted by /u/TheFaeranBlade [link] [comments]

How can there be a speed difference at joining rivers at an Y-shape? Posted: 29 Oct 2016 04:55 AM PDT Im in a discussion with my colleagues on how water flows, we are working on an inland barge. We are moving upstream from point C moving to point A. My colleague says that when we cross from C to A we suddenly move quicker because there is less water coming from A. How is this possible? If it flows faster wouldn't it "bump" into the water from B and then slowdown? https://imgur.com/gallery/CLfBE submitted by /u/meijboomm [link] [comments]

Why do beavers build dams? Posted: 28 Oct 2016 09:21 PM PDT First: I'm unaware of an "ask an animal expert" subreddit, so I hope this still fits here. Second: The most common answer as discovered by google searching suggests that beavers are seeking calmer waters to build their home. This doesn't sound like the end of the story to me. Surely if a beaver simply wants calmer water, they'd seek calmer water. I feel like there has to be more to the behavior, so I'm curious. submitted by /u/SRMTYPST [link] [comments]

What happens when a sound wave encounters a vacuum? Posted: 28 Oct 2016 11:42 AM PDT We know that sound doesn't travel through a vacuum, but something has to happen to the energy of the sound wave when it hits a vacuum. Does it bounce back in the opposite direction? If so, what prevents spacecraft from constantly ringing like a bell? I'm guessing the sound energy will eventually become heat, but doesn't this take some time? submitted by /u/sacrelicious2 [link] [comments]

How do chromosomes survive in the cytoplasm during mitosis? Posted: 28 Oct 2016 01:50 PM PDT I've been taught that DNA cannot survive in the cytoplasm which is part of why transcription must occur in order to send information out of the nucleus and why RNA must be given a poly-A tail before leaving the nucleus. During mitosis however, the nucleus dissolves but the chromosomes survive enzymatic degradation. Just wondering what is done to the chromosomes to allow this? submitted by /u/WilsonWilson64 [link] [comments]

DNA replication - is the leading strand always built complementary to either the coding strand or the template strand? Posted: 28 Oct 2016 03:19 PM PDT So let's say we have a strand of DNA, which is going to be replicated. Helicase begins to unwind one side of the DNA. You won't see both ends being unwound. I assume this means that replication will always start on one particular end of a DNA strand. Which I suspect means that the leading strand will always be complementary to one particular strand of DNA every time (which will be either the coding or the template strand). I can't find any source for this at all. Is the leading strand always complementary to the coding strand, or is the leading strand always complementary to the template strand? submitted by /u/Bob523623424 [link] [comments]

Is there a series that always ends up inconclusive no matter which test you use? Posted: 28 Oct 2016 12:21 PM PDT submitted by /u/sumethreuaweiei [link] [comments]

If there is an absolute zero, is there a finite rate at which a given object's temperature can be lowered? Posted: 28 Oct 2016 05:24 PM PDT My understanding is that the colder a cooling medium is, the faster heat will transfer to that object, so I'm wondering if we can calculate the maximum rate of cooling as a physical limit or whether it's defined by the two substances properties? submitted by /u/Caridor [link] [comments]

What gives the Squid nebula its stretched oval shape? Posted: 28 Oct 2016 06:02 AM PDT Hey today on r/space they were showing this picture made buy Rolf Geissinger of the Squid Nebula: http://apod.nasa.gov/apod/image/1610/Sh2-129+OU4+vdB140_Rolf-Geissinger.jpg What gives the nebula this shape? To my untrained eye it looks like the red cloud is some kind of super nova remnant. kind of like the other one around the star at the bottom left-middle of the picture. Then there is the central blue-white cloud. Is it a disc like object seen edge on? Is it one bright star at the center or one bright one and multiple others? submitted by /u/zwiebelhans [link] [comments]

Would earphones work in space? Posted: 28 Oct 2016 05:10 AM PDT You are wearing earphones connected to a mobile while being in space without a spacesuit, let's imagine you would not freeze to death or suffocate in seconds. Would you be able to hear any sound at all, or feel any vibrations in your ears? submitted by /u/ScamPictures [link] [comments]

Is there any instance of an exoplanet orbiting three separate stars, or is this not even possible? Posted: 28 Oct 2016 06:36 AM PDT submitted by /u/canisdormit [link] [comments]

How do computers keep track of time? Posted: 28 Oct 2016 12:41 AM PDT That little boring fact about computers has always fascinated me, how can electrons keep track of time? Stuff like, how clock cycles are managed, how hertz are measured and throttled through every piece of hardware and interface data delivery. It blows my mind. What piece of hardware is measuring the time? How is that done? submitted by /u/cephsdiablo [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
Google Inc., 1600 Amphitheatre Parkway, Mountain View, CA 94043, United States

During transformation, in genetic cloning using bacteria plasmids as vectors, do bacteria take in the new plasmid while their plasmid exits?

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• During transformation, in genetic cloning using bacteria plasmids as vectors, do bacteria take in the new plasmid while their plasmid exits?
• How did vitamins get their names and numbers (A, B, C, D)?
• Is the average age of speech/language developmental milestones for babies dependent on the native language environment?
• Given enough time could a crab, snail or anything really eventually evolve to become as intelligent as us?
• How does the wait time paradox work?
• How does a 3D bone density scan work?
• If you boil gelatin, does it break apart/hydrolyze?
• What determines if a compound can polymerize?
• could the rise in temperature world wide cause adititional jet streams, or just cause current only one to increase in volatility?
• What are the conditions for animal carcass to fossilize?
• Does Charpy Impact Strength dictate the feasibility of use in ballistic plate carriers?
• Does drinking Gin and Tonic have a strong antimalarial effect?
• What property decides if a material can be a superconductor?
• Is there evidence for former mountain ranges?
• Is there any species where unfertilized eggs can sit dormant for a long time, similar to spores?
• What causes blackbody radiation to occur?
• Why can't we fly to space?
• Would it be possible to code evolution?
• Why are there no Calico humans?
• How are extremely rare minerals found underground?
• Do my hands insulate a cup of tea?

During transformation, in genetic cloning using bacteria plasmids as vectors, do bacteria take in the new plasmid while their plasmid exits? Posted: 27 Oct 2016 10:01 PM PDT The bacteria used in cloning already have plasmids from my understanding. And when we insert a genetically altered plasmid, say for insulin production, and we instigate a transformation reaction the bacteria takes in the new plasmid. What happens to their old, original plasmid? It would be odd if they had two distinct plasmids, or at least I would guess it would be inefficient at producing insulin(in this case) submitted by /u/AnthropomorphicPoppy [link] [comments]

How did vitamins get their names and numbers (A, B, C, D)? Posted: 27 Oct 2016 06:54 PM PDT submitted by /u/orioles629 [link] [comments]

Is the average age of speech/language developmental milestones for babies dependent on the native language environment? Posted: 27 Oct 2016 05:40 PM PDT I mean, is there any difference in speech/language developmental milestone (in terms of age at which the milestone is reached) for a baby raised in USA, China or Iraq? Thanks submitted by /u/youreabsolutelyright [link] [comments]

Given enough time could a crab, snail or anything really eventually evolve to become as intelligent as us? Posted: 26 Oct 2016 10:03 PM PDT EDIT: Ok wow lots of responses. Its going to take a while to read through them all but I think the top comments and most others describe it well. It isn't just time, its environmental factors as well. submitted by /u/Nyxtia [link] [comments]

How does the wait time paradox work? Posted: 27 Oct 2016 02:15 PM PDT I've read a lot of it on the internet and I found this. If a bus comes every 10 minutes (certain) then you'll on average wait 5 minutes. But if a bus comes on average every 10 minutes (uncertain) then you'll wait on average 10 minutes. How did they calculate the 10 minutes? I tried google scholar but couldnt really find something. Really interested in this because I'm following a statistics class this semester. submitted by /u/chg1730 [link] [comments]

How does a 3D bone density scan work? Posted: 28 Oct 2016 05:48 AM PDT submitted by /u/Swarlolz [link] [comments]

If you boil gelatin, does it break apart/hydrolyze? Posted: 27 Oct 2016 08:42 PM PDT Was wondering if I was to boil gelatin, if it would break down more? submitted by /u/Plz_Pm_Me_Cute_Fish [link] [comments]

What determines if a compound can polymerize? Posted: 27 Oct 2016 03:48 PM PDT submitted by /u/nottoodrunk [link] [comments]

could the rise in temperature world wide cause adititional jet streams, or just cause current only one to increase in volatility? Posted: 27 Oct 2016 06:14 PM PDT submitted by /u/randomstardust [link] [comments]

What are the conditions for animal carcass to fossilize? Posted: 27 Oct 2016 07:21 PM PDT I was reading on r/worldnews and there was a news about a dinosaur brain being found fossilized. I had burried a cat before and after two years, there was no soft tissue left, just bones. does it have to do with being mummified? submitted by /u/anewquest [link] [comments]

Does Charpy Impact Strength dictate the feasibility of use in ballistic plate carriers? Posted: 27 Oct 2016 06:50 PM PDT I was researching possible alternatives to AR500 for use in plate carriers, mainly because AR500 is a bit heavier than i expected. I noticed that low alloy steel plates, such as AR500, have a Charpy impact of 24 J, while Nylon 12's impact strength is off the charts. I know that nylon isn't used to protect against bullets, since I haven't seen any purely nylon level III ballistic plates, so this is more an inquiry on how one determines the feasibility of a material to replace AR500 in plate carriers. submitted by /u/plskillmern [link] [comments]

Does drinking Gin and Tonic have a strong antimalarial effect? Posted: 27 Oct 2016 11:43 AM PDT Don't know if this is appropriate for this subreddit, so sorry if this doesn't belong here. So I'm going to Mozambique in December (which is a Malaria district) and I was talking to my dad about how expensive the pills were. He told me that he never takes any pills when visits a Malaria district and that drinking Gin and Tonic is the same as taking the pills, witch I obviously didn't trust at first (he's had Malaria 3 times). So I did some googling and it turns out that Tonic water originally existed as a way to deliver quinine, the active ingredient in most antimalarial drugs. So I was basically just wondering how strong the antimalarial effect of tonic water is. Like, could you get enough quinine just drinking Gin and tonic all day without dying of alcohol poisoning? Note: I am not asking for advice, I will be taking my pills. I'm just curious. submitted by /u/Jones641 [link] [comments]

What property decides if a material can be a superconductor? Posted: 27 Oct 2016 12:22 PM PDT submitted by /u/alectprasad [link] [comments]

Is there evidence for former mountain ranges? Posted: 27 Oct 2016 06:15 PM PDT Mountains to my knowledge are made by tectonic plate movement against each other. Earth has previously had multiple former continents such as Pangaea or Rodinia, so clearly there was the same type of events that lead to our current mountain ranges. But do we know of any specific extinct mountain ranges? Are there methods of determining such mountains existed besides estimations of them from known former plate activity? submitted by /u/FemtoKitten [link] [comments]

Is there any species where unfertilized eggs can sit dormant for a long time, similar to spores? Posted: 27 Oct 2016 10:42 AM PDT submitted by /u/Megatron_McLargeHuge [link] [comments]

What causes blackbody radiation to occur? Posted: 27 Oct 2016 08:46 AM PDT So my question is about the processes that are responsible for blackbody radiation at the atomic/molecular level. As in, what kind of transitions are responsible for BB radiation, e.g., vibrational transitions, or rotational transitions etc. Also I am somewhat confused as to the energy levels of vibrational/rotational and translational motion are discrete, whereas BB radiation is continuous. So how can one account for that? submitted by /u/zurvanyazdi [link] [comments]

Why can't we fly to space? Posted: 27 Oct 2016 12:56 PM PDT I know that we should be going faster than earth's escape velocity and normal engines don't work because the atmosphere keeps getting thinner till it disappears, But what if we flew at the highest altitude possible by a hypersonic aircraft then we go full vertical and fire a set of rocket boosters, it should get us to space right, along with some fuel savings. submitted by /u/TheNASAguy [link] [comments]

Would it be possible to code evolution? Posted: 27 Oct 2016 11:38 AM PDT I know we don't have all of the information for the various branches of evolution. But assuming we did, would it be possible to create a base class as some initial prokaryotic organism (maybe even a simple organic compound) with primitive behavioral functions, keep creating sub classes that build upon it iteratively adding more basic functions based on a rough concept of how evolution happened? Coding even a basic Eukaryota organism would be pretty hard, but could building upon it incrementally work to create an organism, as a simulation of evolution? I'm sorry if the question seems poorly thought out, because it is. It's just a thought I had studying software design because inheritance diagrams look extremely similar to the evolutionary tree (which is kind of the point). submitted by /u/javaberrypi [link] [comments]

Why are there no Calico humans? Posted: 27 Oct 2016 10:19 AM PDT For reference, perhaps watch this video. It's where the bulk of my knowledge of what 'causes' Calico comes from. https://www.youtube.com/watch?v=BD6h-wDj7bw Hopefully Derek hasn't led us astray on this one. But the question remains, why don't humans show this 'calico' pattern, specifically in children of mixed race? I found this Q/A with a couple of scientists, but both of them seem to have just gone with "well we really don't know" http://www.thenakedscientists.com/HTML/questions/qotw/question/1000075/ Surely there must be a better answer out there. I know about Chimerism, but that's not the same thing, and still doesn't show physically (except on episodes of CSI) Thanks! submitted by /u/seanbrockest [link] [comments]

How are extremely rare minerals found underground? Posted: 27 Oct 2016 11:55 AM PDT I was reading around on extremely rare minerals like Painite. Where only 2 crystals of it have been found ever. It got me wondering, how do people find stuff like this? I'm assuming stuff like this is just found by accident. When Miners are digging away with their machines, do they have to check for really rare minerals or is it found later down the line at processing? submitted by /u/Ecchievements [link] [comments]

Do my hands insulate a cup of tea? Posted: 27 Oct 2016 07:46 AM PDT submitted by /u/thirty-forty [link] [comments]

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AskScience AMA Series: I'm Dan Riskin: author, bat biologist, host of Animal Planet's Monsters Inside Me and co-host of Daily Planet. I wrote my PhD on bats and since it's Bat Week, I thought I'd take a swing at some of your questions. (See what I did there?)

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• AskScience AMA Series: I'm Dan Riskin: author, bat biologist, host of Animal Planet's Monsters Inside Me and co-host of Daily Planet. I wrote my PhD on bats and since it's Bat Week, I thought I'd take a swing at some of your questions. (See what I did there?)
• What would happen if antimatter entered a black hole?
• What is the fastest theoretical speed a planet (rocky or gas giant) or dwarf planet can rotate without breaking up? Also what is the timescale for one rotation in comparison to an Earth-standard day?
• When the Earth had only a singe continent, was its rotation off balance?
• If a mass-spring system is hung from a vibrating object, at what frequency would the mass begin to oscillate?
• What is line-by-line phase reversal and how did it help bring about color television?
• When doing separation of variables for partial differential equations, why do we assume the initial equation is a product of two one-dimensional functions?
• Can insects be albino?
• How does Cognitive Remediation Therapy differ from "Brain Training"?
• Why does a radio get better signal when we touch the antenna or get close to it?
• How can a particle tunnel if it exists as a quantum superposition of states?
• When a protostar begins fusion and becomes a star is there a sudden release of energy?
• Where does the energy for work performed by a superconductor come from?
• Can air permeate through window glass?
• What are some energy sources better than electricity?

AskScience AMA Series: I'm Dan Riskin: author, bat biologist, host of Animal Planet's Monsters Inside Me and co-host of Daily Planet. I wrote my PhD on bats and since it's Bat Week, I thought I'd take a swing at some of your questions. (See what I did there?) Posted: 27 Oct 2016 07:13 AM PDT I've seen >100 species of bats in the wild (not bad but far short of the 1,300+ species out there). For my PhD, I put vampire bats on treadmills to compare their walking performance to those of other animals. To my surprise, vampire bats had a running gait. That was my big break. Soon, I got TV gigs, like the job hosting Monsters Inside Me for Animal Planet, and guest appearances on Craig Ferguson, Jay Leno and Dr. Oz. I am the co-host of Discovery Canada's flagship daily science show, Daily Planet, and I'm the author of Mother Nature is Trying to Kill You (2014). My latest project is a weekly 10-15 minute podcast called Recent Paper Decent Puzzle in which I pick an interesting scientific journal article paper to break down and then "cleanse your mental palate" with a fun puzzle. I often talk about bat papers because let's face it, bats are the most charismatic creatures on Earth. Did you know some bats feed on fish? Did you know there are bats with suction cups on their wrists and ankles? Did you know some bats perform oral sex on one another? I could go on. Oh wait, I will! Let's blab about bats. Also, I'll happily answer questions about other things, too, like what it's like to work on Monsters Inside Me (there's a new episode tonight!), or about my experience doing the podcast. This will be my third AMA, and I hope it is just as fun as the last two. Coming on at noon (ET), bring it, Redditors. Proof: https://twitter.com/riskindan/status/791659729047216128 submitted by /u/AskScienceModerator [link] [comments]

What would happen if antimatter entered a black hole? Posted: 27 Oct 2016 07:42 AM PDT submitted by /u/aschesklave [link] [comments]

What is the fastest theoretical speed a planet (rocky or gas giant) or dwarf planet can rotate without breaking up? Also what is the timescale for one rotation in comparison to an Earth-standard day? Posted: 26 Oct 2016 05:20 PM PDT submitted by /u/Brahminmeat [link] [comments]

When the Earth had only a singe continent, was its rotation off balance? Posted: 26 Oct 2016 01:50 PM PDT So, continental crust is thicker, older and, generally, more massive than oceanic crust. During the periods when one or two super-continents (Pangaea, Gondwanaland etc) were concentrated in one hemisphere of the Earth, did the distribution of oceanic vs continental crust mean that Earth's centre of mass was off centre? Would this mean that its rotation was 'unbalanced' in a way that would have caused it to wobble or rotate off-axis? submitted by /u/propsie [link] [comments]

If a mass-spring system is hung from a vibrating object, at what frequency would the mass begin to oscillate? Posted: 27 Oct 2016 02:48 AM PDT And how would one go about calculating it? submitted by /u/DAV3407 [link] [comments]

What is line-by-line phase reversal and how did it help bring about color television? Posted: 26 Oct 2016 08:06 PM PDT In this video by the channel standupmaths, the narrator states that line-by-line phase reversal was used to enable colored TV. While the narrator does walk through the math of how line-by-line phase reversal solves the issue of incorporating color TV signals into pre-existing picture and sound signals, he does not explain the physics concepts that underlie line-by-line phase reversal. Could someone please explain what line-by-line phase reversal is and why it was useful in the context of TV development? submitted by /u/effervescence1 [link] [comments]

When doing separation of variables for partial differential equations, why do we assume the initial equation is a product of two one-dimensional functions? Posted: 26 Oct 2016 02:42 PM PDT For example, say I have a function u(x.t) and want to solve the Laplace for u(x.t). I would first set u(x,t) = X(x)T(t). Why is it assumed that u(x,t) = X(x)T(t) and not something else like X(x) + T(t)? submitted by /u/ThePharros [link] [comments]

Can insects be albino? Posted: 26 Oct 2016 10:41 AM PDT I've tried googling it, some sources say that they can, some that they can't. submitted by /u/alcanx [link] [comments]

How does Cognitive Remediation Therapy differ from "Brain Training"? Posted: 26 Oct 2016 08:17 PM PDT After doing a little Google research on both, it seems that both are relatively similar, however, CRT is said to be somewhat effective at helping people with previous brain injuries and schizophrenia. What sets it apart from the more commercial "brain training" craze that's taken off with sites like Lumosity? Or is CRT ambiguously helpful like brain training? submitted by /u/stalolin [link] [comments]

Why does a radio get better signal when we touch the antenna or get close to it? Posted: 26 Oct 2016 09:54 AM PDT I don't know what category this should be under so if a mod reads this could you pick one for me. If i have to pick i would say biology or physics. submitted by /u/dgaubatz313 [link] [comments]

How can a particle tunnel if it exists as a quantum superposition of states? Posted: 26 Oct 2016 07:39 PM PDT As I understand it, radioactive decay (or particle decay) occurs because the constituent elementary particles have a probability of tunneling to a location where the binding force can no longer hold the composite particle together. I also understand that a particle generally exists in a superposition of positions, and only definitely has a position when observed. I am having trouble reconciling these two ideas. If an elementary particle continues to exist as a superposition of wave functions, what observation is it that localizes the particle outside of the composite particle in a decay event? Are composite particles constantly being "observed" in some sense? Are my understandings incorrect (probably)? submitted by /u/hansn [link] [comments]

When a protostar begins fusion and becomes a star is there a sudden release of energy? Posted: 26 Oct 2016 10:55 AM PDT When a protostar becomes a true star does the initial fusion reaction cause some sort of large, sudden expulsion of energy (like a nova) or does it just sort of grow and radiate energy as it does now was it consumes materials around it? Specifically, if it does create some sort of blast is it powerful enough to throw small moon-like planets and asteroids from its orbit? submitted by /u/NorthboundFox [link] [comments]

Where does the energy for work performed by a superconductor come from? Posted: 26 Oct 2016 12:26 PM PDT Work done by a circuit is defined as the difference in voltage between two places, so if there is no resistance in the part, it has done no work, as it has not converted any of the electrical energy to other energy. Say, an electromagnet made of superconductor-material is used to push an object away from it, it has performed work on the object, but where does the energy for the work come from, since there is no resistance in a superconductor? submitted by /u/BallsofKevlar [link] [comments]

Can air permeate through window glass? Posted: 26 Oct 2016 04:00 AM PDT I always shut the blinds at night because I thought it would keep more of the cold air out, thinking that cold air permeates through glass and the blinds would simply act as a secondary barrier. My friend laughed and said that's wrong. I've always just assumed this, is there any benefit to it? TL;DR: Will shutting the window blinds "keep more cold air out" submitted by /u/Schemes011 [link] [comments]

What are some energy sources better than electricity? Posted: 26 Oct 2016 07:42 AM PDT Its hard to define energy source when talking about electricity because everything runs off it, but for the sake of this, what are some things either: A. If you designed a system around it, something could be powered by it. Example: pnuematics use electricity but also air. B. Alternative ways of generating electricity that we just don't use for some reason. (preferably small scale, we all know nuclear and etc) submitted by /u/Mike_Handers [link] [comments]

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