I put a 1 liter bottle of water and two 0.5 liter bottles of water in the freezer. Will the two 0.5 liter bottles freeze faster as the 1 liter bottle and why (not)?

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• I put a 1 liter bottle of water and two 0.5 liter bottles of water in the freezer. Will the two 0.5 liter bottles freeze faster as the 1 liter bottle and why (not)?
• Does an object using a sling shot maneuver effect the orbit of the planet it is acted upon?
• I read that continental drift is one of the factors that allows earth to have a breathable atmosphere. Or at the very least, is necessary for life on the planet. Is this true? If so then why?
• Isn't gravity just a side-effect of the bending of space by objects with mass?
• Would a catalytic recombiner work on methane?
• Anyone remember the term used to refer to the kind of immunity that our microbiome provides for us?
• We know matter cannot be created nor destroyed, but what if it could be? What are the ramifications?Would the universe implode, or would there just be some new stuff around?
• What is the actual physical mass of a photon?
• What determines the speed at which water ripples travel at?
• Does the earth's rotation affect the observed magnitude of the planet's gravitational pull?
• Why would a pregnant woman crave things like dirt or glass, what's the brain's reasoning behind this?
• Can anyone explain the Georgi-Glashow Model, specifically, interpreting the graphs within?
• According to this video regarding how special relatively causes electromagnetism, what would happen if the "positively charged cat" were stationary and why?
• Ask Anything Wednesday - Biology, Chemistry, Neuroscience, Medicine, Psychology
• Wouldn't Timetravel(to the past) violate the Law of Conservation of Energy?
• why don't stars appear red but white? It is said that only red colour sustains when light travels a long distance!
• Do the Northern Lights affect atmospheric temperatures?
• Could a large amount of rain trigger an earthquake in California?
• How genetically similar must two organisms be to breed?
• Do animals experience Confirmation Bias?
• Does the brain compensate for volume in the right or left 'channels' when one ear or the other is muffled or obstructed for an extended period of time?
• Mechanics: Mathematically, what is the thought process behind moment of inertia and why is it used in mechanics of materials?
• Does the human brain differ on a physical level, before and after acquiring knowledge?

I put a 1 liter bottle of water and two 0.5 liter bottles of water in the freezer. Will the two 0.5 liter bottles freeze faster as the 1 liter bottle and why (not)? Posted: 31 Dec 2015 04:18 AM PST submitted by Zinnsoldat [link] [27 comments]

Does an object using a sling shot maneuver effect the orbit of the planet it is acted upon? Posted: 30 Dec 2015 11:44 AM PST As the title says, does using a planets gravitational pull effect the planets eventual orbit? Does is slow it down even just a little? If not why? What about the "equal and opposite reaction" law? submitted by chasmnaut [link] [55 comments]

I read that continental drift is one of the factors that allows earth to have a breathable atmosphere. Or at the very least, is necessary for life on the planet. Is this true? If so then why? Posted: 30 Dec 2015 08:08 AM PST submitted by Mr-1984 [link] [23 comments]

Isn't gravity just a side-effect of the bending of space by objects with mass? Posted: 31 Dec 2015 07:08 AM PST submitted by trackday [link] [1 comment]

Would a catalytic recombiner work on methane? Posted: 30 Dec 2015 03:45 PM PST This relates to the methane storage losing inventory in California. Catalytic recombiners are used as an emergency way to get rid of hydrogen inside the containment of a nuclear power plant. Seems like the methane in jCA represents a huge risk of explosion, in addition to the greenhouse gas released if it does not explode or burn. If a recombiner would work, over what range of gas concentrations could it operate? Who makes them? submitted by SWaspMale [link] [4 comments]

Anyone remember the term used to refer to the kind of immunity that our microbiome provides for us? Posted: 30 Dec 2015 09:30 AM PST Specifically the one that prevents the colonization of pathogens because of the presence of other bacteria in our guts. I can't seem to remember the term and it is frustrating me submitted by Arlind13 [link] [19 comments]

We know matter cannot be created nor destroyed, but what if it could be? What are the ramifications?Would the universe implode, or would there just be some new stuff around? Posted: 31 Dec 2015 06:19 AM PST submitted by poopfays [link] [4 comments]

What is the actual physical mass of a photon? Posted: 30 Dec 2015 11:32 AM PST Do we even know what it is yet? submitted by blueredscreen [link] [47 comments]

What determines the speed at which water ripples travel at? Posted: 30 Dec 2015 12:51 PM PST When you throw a pebble into a lake, water ripples out from the point the pebble entered. When throwing a large rock into a lake , the water seems to ripple at the same speed (to me at least, correct me if I'm wrong). The only thing that seems to change is the height of the ripples. Why do the ripples move at a constant speed, and is there a way to change the speed of the ripples? Thanks! submitted by Swimguy72125 [link] [3 comments]

Does the earth's rotation affect the observed magnitude of the planet's gravitational pull? Posted: 31 Dec 2015 03:07 AM PST This may or may not be a silly question, but my degree is in biology and I don't remember a ton from my two semesters of physics. Correct any of my assumptions if they are false. All massive objects exert a gravitational pull on other bodies. Does the earth's rotation result in any kind of an outward force that slightly affects the measured gravitational pull off the earth? Or in other words, would our weight be any different if the planet suddenly stopped rotating? I'm just thinking of things (like spinning tops or those carnival rides the spin you while you sit in a chair) and how objects connected to the spinning object experience an outward centrifugal force as a result of the rotation. Thanks for any responses! This was basically a shower thought that got me curious, and a little upset at myself because I know this is a pretty basic question. submitted by mandelbomber [link] [1 comment]

Why would a pregnant woman crave things like dirt or glass, what's the brain's reasoning behind this? Posted: 30 Dec 2015 07:31 AM PST submitted by _Plaka [link] [17 comments]

Can anyone explain the Georgi-Glashow Model, specifically, interpreting the graphs within? Posted: 30 Dec 2015 12:31 PM PST See here. How does such a graph explain proton decay? submitted by Riley0143 [link] [1 comment]

According to this video regarding how special relatively causes electromagnetism, what would happen if the "positively charged cat" were stationary and why? Posted: 30 Dec 2015 01:56 PM PST This video cleverly explains how special relativity plays a role in causing electromagnetism. ***Actual explanation starts 1:07 However (and I can't confirm a reliable answer in the Youtube comments alone) what would actually happen if the "positively charged cat" was stationary? Would the cat then be attracted to the wire due to length contraction resulting in higher perceived density in negatively charged electrons? Thanks in advanced! submitted by Mint_Throw [link] [7 comments]

Ask Anything Wednesday - Biology, Chemistry, Neuroscience, Medicine, Psychology Posted: 30 Dec 2015 07:06 AM PST 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 AutoModerator [link] [9 comments]

Wouldn't Timetravel(to the past) violate the Law of Conservation of Energy? Posted: 30 Dec 2015 08:21 AM PST My thoughts: If you "move" mass, or let's say me, back in time, so that I would be able to interact with, for example, my past self, wouldn't it cause a Paradox, since my body was(or will be?) missing in the future, while there's twice of my body in the past than there's supposed to be? I thought maybe it would cancel out, since my past self would go on to travel back, leaving the future with only 1 me. Thought's? Be harsh and show me contradictions :) submitted by art_dreadnought [link] [4 comments]

why don't stars appear red but white? It is said that only red colour sustains when light travels a long distance! Posted: 30 Dec 2015 07:34 AM PST submitted by thouloondu [link] [16 comments]

Do the Northern Lights affect atmospheric temperatures? Posted: 30 Dec 2015 08:24 AM PST Either "locally" or globally? submitted by aerospacemonkey [link] [2 comments]

Could a large amount of rain trigger an earthquake in California? Posted: 30 Dec 2015 08:05 AM PST The area of CA is 163,696 sq mi. If an avg of 8 inches of rain fell over the whole state. Would that be enough mass to cause a shift in the tectonic plates? A little more math. 62.4 lbs/cu ft x 8/12' x 5280'x5280' = 13.9 e9 lbs per sq mi. Total weight would be 2.278 E15 lbs or 1.14 E12 tons. 8 inches is conservative, and the distribution will not be equal across the whole state. submitted by Felipelocazo [link] [7 comments]

How genetically similar must two organisms be to breed? Posted: 30 Dec 2015 05:41 AM PST Things like crossbreeds in dogs are possible. Things like Ligers and Tigons are possible. Is there a known hard cutoff of how genetically similar organisms must be to breed? submitted by the_nog [link] [10 comments]

Do animals experience Confirmation Bias? Posted: 30 Dec 2015 04:31 AM PST Trying to train my dog to ask when he wants to go outside or when he wants food. It isn't going great. This led me to wonder, does he misinterpret training attempts because of confirmation bias? submitted by ryeinn [link] [9 comments]

Does the brain compensate for volume in the right or left 'channels' when one ear or the other is muffled or obstructed for an extended period of time? Posted: 30 Dec 2015 02:45 AM PST I had surgery removing a cyst that covered 80-90% of the right ear canal. It was there for more than 3 years. Now that I've recovered and removed the gauze it's almost as if the right ear is hearing things louder than the left ear. Is this merely placebo or is the brain biasing the right ear because it's been obstructed for so long? submitted by ruahmina [link] [comment]

Mechanics: Mathematically, what is the thought process behind moment of inertia and why is it used in mechanics of materials? Posted: 30 Dec 2015 01:52 AM PST I think that a lot of engineers just power through their mechanics of materials class, but this seems to be a concept that underlies everything we do. I can rattle off a few equations off the top of my head, but what is really happening kind of perplexes me. It's just this number we get that helps us to describe how stuff bends or breaks. For example, for a rectangle its BH3 /12. I'm going to assume that its a relationship between the base and height of a rectangle, thats fairly obvious because they are the only variables. What integration had to be made to get there though? The wikipedia article doesn't give something I'm really happy with. submitted by Laffmeister [link] [5 comments]

Does the human brain differ on a physical level, before and after acquiring knowledge? Posted: 30 Dec 2015 04:40 AM PST With enough precise observation of the brain, would it be possible to tell the difference between one's brain before and after learning a single piece of information? And would it also be possible to figure out the contents of the information? And Conversely, would it be possible to make the brain "know" a certain information by manipulating the brain physically, say, on a molecular or atomic level? (not necessarily with current technology, are these theoretically possible?) submitted by marmotini [link] [3 comments]

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AskScience AMA Series: Scientists are on board the R/V JOIDES Resolution for two months to drill approximately 1500 meters into the Atlantis Bank gabbroic massif. Gabbro is an intrusive igneous rock that forms when magma is trapped beneath Earth's surface and cools slowly. AUA!

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• AskScience AMA Series: Scientists are on board the R/V JOIDES Resolution for two months to drill approximately 1500 meters into the Atlantis Bank gabbroic massif. Gabbro is an intrusive igneous rock that forms when magma is trapped beneath Earth's surface and cools slowly. AUA!
• What makes water such a good solvent?
• Why do I see concentric circles when I look at my phone screen while wearing (polarized) 3D glasses?
• Can someone explain the increase in shale oil production?
• How do we know that the Mariana Trench is the deepest part of the ocean? No chance it's incorrect?
• Why does the common cold progress the way it does? (Sore throat -> Sneezing -> Coughing)
• What would be the effects if a multi-generational spacecraft on the human body?
• Do gases flow faster than liquids when put under an equal force/pressure?
• What is the evolutionary benefit for a tobacco plant to contain nicotine?
• Why do fireflies glow?

AskScience AMA Series: Scientists are on board the R/V JOIDES Resolution for two months to drill approximately 1500 meters into the Atlantis Bank gabbroic massif. Gabbro is an intrusive igneous rock that forms when magma is trapped beneath Earth's surface and cools slowly. AUA! Posted: 30 Dec 2015 04:36 AM PST The International Ocean Discovery Program (IODP) conducts scientific ocean drilling expeditions throughout the world's oceans in search of clues to Earth's structure and past. The current expedition is Expedition 360: Indian Ridge Moho, aboard the U.S. vessel for scientific ocean drilling, the JOIDES Resolution (www.joidesresolution.org). On this expedition, our first objective is to recover gabbros and crust-mantle transition to understand the processes that creates mid-ocean ridge basalt. We also aim to resolve the controversy as to whether the boundary between Earth's mantle and crust, or Moho, at slow spreading ridges can be a serpentinization front. Serpentine contains minerals that give it a green color. The results will profoundly affect our understanding of magma generation and the linkage between the mantle, melt, and crust. Other objectives include testing the nature of magnetic reversals in plutonic rock, or intrusive igneous rock, and documenting the stress-strain evolution of a plate boundary undergoing asymmetric seafloor spreading. AMA! A team of 30 scientists from around the globe are on board for two months to work on these questions. Hand-in-hand with the amazing technology required to drill deep into the ocean floor, we are collecting the core samples that hold clues to answer these questions. Listen to this podcast to learn a bit more and hear about all the media attention this expedition has already been receiving: http://joidesresolution.org/node/4349 Join us to ask us anything about this intriguing science, how we got here, what we hope to discover, and our lives on board the ship! We'll be back at 1 pm EST (10 am PST, 6 pm UTC) to answer your questions, ask us anything! submitted by IODP [link] [14 comments]

What makes water such a good solvent? Posted: 29 Dec 2015 07:46 AM PST What is it about water that means so many different substances dissolve in it? EDIT: Wow, I didn't expect so many answers! Thank you for taking the time to explain it to me (and maybe others)! submitted by silverben10 [link] [472 comments]

Why do I see concentric circles when I look at my phone screen while wearing (polarized) 3D glasses? Posted: 29 Dec 2015 05:00 PM PST I noticed this at the movie theater yesterday. When I looked at my phone screen at the right angel while wearing 3D glasses, I could see concentric circles in the area of my screen. Also, if I looked only through my left eye, it would be the inverse of what I saw when I looked through only my right eye. I'm assuming this has something to do with how the polarization of light works in either a clockwise and counter clockwise fashion? I would love to know the answer to this question. submitted by YouMayHaveSeenMeOnTV [link] [4 comments]

Can someone explain the increase in shale oil production? Posted: 29 Dec 2015 12:25 PM PST I started reading the book Oil 101 to learn the basics of oil and how to invest in oil. The book was published in 2009 but seems to be outdated already. The author talks about how costly and inefficient it is to produce synthetic crude from shale oil. According to the book a metric ton of shale oil yields 30 gallons of synthetic crude and the EROI is less than 1. What has changed in the last 5 years that has made shale oil economically viable to use? I am particularly interested in any technological innovations. submitted by liljinx13 [link] [17 comments]

How do we know that the Mariana Trench is the deepest part of the ocean? No chance it's incorrect? Posted: 29 Dec 2015 09:29 AM PST submitted by rsashe1980 [link] [7 comments]

Why does the common cold progress the way it does? (Sore throat -> Sneezing -> Coughing) Posted: 29 Dec 2015 07:32 AM PST submitted by surrealistical [link] [3 comments]

What would be the effects if a multi-generational spacecraft on the human body? Posted: 29 Dec 2015 01:43 PM PST If we had the capability of going light speed, would we be able to move around on the ship? How long would it take to get to the nearest planet that could sustain life, if we were traveling at light speed? How far are we from the technology of going at light speed? How would a deep sleep/freeze sort of thing work, if at all? What would the effects of a deep sleep machine do on the human body? How large of a ship would we need to have enough resources for a multi-generational ship? Would we need feeding tubes for a deep freeze thing? How much "nitrogen?" Would we need to sustain ourselves in deep sleep for the amount of time in order to get to the nearest life sustaining planet? submitted by Iamrichardwt [link] [16 comments]

Do gases flow faster than liquids when put under an equal force/pressure? Posted: 29 Dec 2015 01:25 PM PST Say I have 2 syringes. One is filled with air and the other with water. If I put a x amount of force on the plunger to force the fluids out, which syringe (gas or liquid) would have the higher volumetric flow rate?. What about the mass flow rate? Thanks for responding! submitted by portmantoux [link] [comment]

What is the evolutionary benefit for a tobacco plant to contain nicotine? Posted: 29 Dec 2015 06:09 AM PST From my understanding it wouldn't be there if it didn't serve a purpose for the survival of the plant. What did it do for the plant? submitted by someinternetnub [link] [8 comments]

Why do fireflies glow? Posted: 29 Dec 2015 11:05 AM PST Not why as in how, but, which is the ''reason'' behind the evolution, one would think that the glowing would attract more predators. submitted by fedemotta [link] [9 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

With advances in many fields of Medicine including the transplant of synthetic hearts and 3d printing of various body parts making cheap prosthetics possible, why haven't we seen significant advances in prosthetic cartilage for damaged joints and herniated disks?

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• With advances in many fields of Medicine including the transplant of synthetic hearts and 3d printing of various body parts making cheap prosthetics possible, why haven't we seen significant advances in prosthetic cartilage for damaged joints and herniated disks?
• A 1.5 gram serving of salt has 560mg of sodium, what's in the other gram?
• What are we missing before we finally have a quantum theory of gravity?
• Do small people/children have the same amount of sensory neurons as larger people, and if so, does this make them more sensitive to touch?
• Of a 20-floored building, which floor would encounter the most danger assuming that an earthquake takes place and does not collapse the building, and why?
• What's the perfect throwing weight for a spherical object?
• How do I explain/apply equations to the oscillation of a metal needle due to an electromagnet? (Images in description)
• What causes a specific note to be produced when feedback is looped through an amplifier back to the pickup?
• What causes that colorful swirling effect when milk, food coloring and soap are combined?
• Is there a limit to the size of a black hole?
• How do you calculate load distribution on an uneven beam?
• How do fields exert force over distance?
• Why do the bottom edges of sunsets become round as if it became a flat tire and no longer a full circle?
• Why is glare/reflections polarized?
• Why does every video game seem to have a problem when you're swimming if you put your view in a sweet spot before submerged and above water, you can see clearly through the water?
• Do sleepwalkers still get rest while sleepwalking?
• Twin Paradox - Is the travelling twin younger?
• How do we measure the age of ice?
• Physiologically, how do you "lose" weight - do you respire or pee it off?
• Will a suction cup work in space?
• Why does a 2 degree temperature change have such dramatic effects on weather (such as superstorms, massive tornadoes, floods ect)?
• In Genetics, is there an actual distinction between distant, but linked loci, and unlinked loci?
• What is the renormalization group?
• What is the physical quantity of the gravitational constant?

With advances in many fields of Medicine including the transplant of synthetic hearts and 3d printing of various body parts making cheap prosthetics possible, why haven't we seen significant advances in prosthetic cartilage for damaged joints and herniated disks? Posted: 28 Dec 2015 08:49 AM PST Both my sister and mother are suffering from bad cases of hernia and knee pain. Something like cartilage seems like a simple enough structure to manufacture when we're printing heart valves and other much more complicated structures. And yet, I've been reading and talking with non-experts involved in fitness science that we just haven't found the right material, with the right type of properties to replace real cartilage. Doctors/medical researchers, what are the major hurdles faced by prosthetic cartilage today? Edit: please keep this as ELI5 as possible, I don't have a very scientific background. Edit2: Researchers : where is the research at now? What sort of time-frame are we looking at for general use of prosthetics, if you can provide one? submitted by eplusl [link] [278 comments]

A 1.5 gram serving of salt has 560mg of sodium, what's in the other gram? Posted: 28 Dec 2015 09:37 AM PST Title says it all. submitted by FlabbyGabber [link] [103 comments]

What are we missing before we finally have a quantum theory of gravity? Posted: 28 Dec 2015 11:04 AM PST I know the motivations behind string theory and other models of quantum gravity (e.g. unification of fundamental forces) but what I don't understand is what is missing from the current proposed models. Do we have all the details worked out and we're just waiting for experimental verification? Are there still theoretical issues that these models cannot address? I remember reading part of Quantum fields in curved spacetime by Birrell & Davies and in the introduction they discussed issues with renormalization of infinities in the ground state energy of the quantum harmonic oscillator and how certain tricks to skirt that issue don't work with gravity. Is that still a problem? submitted by DarkAvenger12 [link] [22 comments]

Do small people/children have the same amount of sensory neurons as larger people, and if so, does this make them more sensitive to touch? Posted: 28 Dec 2015 07:48 AM PST submitted by insipid_comment [link] [8 comments]

Of a 20-floored building, which floor would encounter the most danger assuming that an earthquake takes place and does not collapse the building, and why? Posted: 28 Dec 2015 07:50 AM PST submitted by timmythepd [link] [45 comments]

What's the perfect throwing weight for a spherical object? Posted: 28 Dec 2015 10:38 AM PST Is there a specific weight that's most advantageous for throwing objects? Like, if it's too light, it doesn't get very far, and of course if it's too heavy, it can't be lifted in the first place. For the average person, what's the best weight for, say, a spherical object, a basic ball, to be so it can be thrown the farthest? [Physics] submitted by ladytenille [link] [20 comments]

How do I explain/apply equations to the oscillation of a metal needle due to an electromagnet? (Images in description) Posted: 29 Dec 2015 07:00 AM PST I recently did some experiments with an electromagnet and a magnetic(?)(it is affected by magnets) needle, like so (images) The experiment was simple: I put a metal rod through a spool(coil?) creating an electromagnet and sat a rotating needle next to it. I made sure the rod was un-magnetic(?) before starting the experiment by switching between multiple and then turned the magnet on. I used different voltages to create different strengths of magnetism and filmed the system. I will be using tracker to graph the needle (in progress). I realise now that I (maybe) should not have measured the strength in voltage, but it does give you some indication of the strength I believe. My aim was to find the relationship between the strength of the electromagnet and the frequency of the oscillation of the needle, but I haven't been able to find out what equations to consider, as they are not in my syllabus. I know gravitational equations on the forces between two masses and that the strength of the force depends on the mass of the objects and the distance squared. I'm guessing magnetic forces are somewhat the same only relating perhaps to the charge(?) of the objects but also the distance. I also know equations related to simple harmonic motion and oscillations which I'm guessing is also involved somehow as the needle kinda resembles a classic pendulum, only the force is a magnet. How would I go about this? How do I apply physics to the oscillations? I could post more pictures or even a video if that helps, but I think you get the general idea from the pictures I posted. submitted by apolloeleven [link] [comment]

What causes a specific note to be produced when feedback is looped through an amplifier back to the pickup? Posted: 28 Dec 2015 11:35 AM PST Hey guys, I was playing my guitar today and I noticed when you crank the amplifier gain and have your volume at a reasonable setting, you generate a feedback loop. This isn't new but what I noticed was the note it produced, it was inline with the harmonic points of the string, and not the note of the open string itself. My previous physics knowledge taught me that a harmonic is a temporary node on the string, similar to a fret except that it isn't a physical node. When a harmonic is struck, the entire string has energy producing the wavelength but it is completely stationary at the node point. These nodes are perfect divisors of the entire length of the string, causing the frequency to multiply linearly (1st harmonic is the open string, 2nd harmonic is the string divided in half, 3rd is the quartered string and so on). What causes the string to produce a note that coincides with the harmonic points on the string, but without any nodes? As a footnote, if you have a guitar play the E harmonic on the A string (7th fret), it's an E5 apposed to the A3 you play with the open string. That E5 is the note my amplifier feeds back to my pickup, except there's no human interaction creating the note. And it isn't a harmonic played by the string. submitted by Arcansis [link] [12 comments]

What causes that colorful swirling effect when milk, food coloring and soap are combined? Posted: 29 Dec 2015 05:07 AM PST It looks like there is a lot going on once soap is added to the mixture. I am imagining an all-out war being fought on molecular scale. Is the milk only there to prolong the chaos by keeping the food coloring and soap from dissipating too fast or does it serve as a catalyst somehow? What exactly is happening here? submitted by KiroSkr [link] [2 comments]

Is there a limit to the size of a black hole? Posted: 29 Dec 2015 04:56 AM PST If there is, what is it and why it exists? I specifically mean the upper limit, edited to add. submitted by k_of_ni [link] [1 comment]

How do you calculate load distribution on an uneven beam? Posted: 28 Dec 2015 11:30 AM PST If a beam is supported at either end, but one end is higher, is it correct that the lower end will bear more weight? How would the load difference at the two points be calculated? submitted by Carbolic_Smoke [link] [13 comments]

How do fields exert force over distance? Posted: 28 Dec 2015 10:16 AM PST For example, how does one charge exert force on another without being in physical contact submitted by M_Night_Shamylan [link] [16 comments]

Why do the bottom edges of sunsets become round as if it became a flat tire and no longer a full circle? Posted: 28 Dec 2015 07:49 AM PST Here is an example submitted by joepamps [link] [4 comments]

Why is glare/reflections polarized? Posted: 28 Dec 2015 03:46 PM PST submitted by oryza162 [link] [3 comments]

Why does every video game seem to have a problem when you're swimming if you put your view in a sweet spot before submerged and above water, you can see clearly through the water? Posted: 28 Dec 2015 01:36 PM PST I hope I explained it well. I'm a very big gamer, and I've noticed time and time again, across tons of games, that there always seems to be this sweet spot with games that allow you to go underwater where, if you are just barely-not-even submerged, the game allows you to see as clearly through water as it does the sky. Is this a common programming issue or just a product of a time-tested water system? submitted by NotADemon_AMA [link] [5 comments]

Do sleepwalkers still get rest while sleepwalking? Posted: 28 Dec 2015 03:21 PM PST Will a sleepwalker wake up just as well rested as a person who does not sleepwalk. submitted by SenatusRomanus [link] [4 comments]

Twin Paradox - Is the travelling twin younger? Posted: 28 Dec 2015 10:11 AM PST Discussing with a friend whether the twin paradox is valid or not under Einstein's relativity theory. Le me posit it as we are discussing. Assume one twin stays on Earth. The other one travels to Alpha Centauri and back at 0.8c. Let's assume he needs to accelerate/decelerate as well. When the travelling twin returns to Earth, are they the same age? Or is the travelling twin younger? My understanding of relativity says the later, as apparently does Wikipedia. This link however says otherwise. Can any physicists chime in on whether under the simulated trip as described above there would be a difference in age? submitted by guibs [link] [22 comments]

How do we measure the age of ice? Posted: 28 Dec 2015 09:44 AM PST I'm explaining (poorly) how climate change is not only real to my grandfather but explaining in laymen's terms how we can measure it. This led to me pointing out a few receding glaciers and he seems to think that ice just comes and goes. How do we know a glacier is old? E; added is submitted by crornel [link] [8 comments]

Physiologically, how do you "lose" weight - do you respire or pee it off? Posted: 28 Dec 2015 04:05 PM PST I have read that you respire it off and urinate off the products of anaerobic respiration. Does it all boil down to getting the body into some state of ketoacidosis? I know that it just doesn't "melt" away. Thanks and please get technical. submitted by alltimestar [link] [4 comments]

Will a suction cup work in space? Posted: 28 Dec 2015 09:40 AM PST I'm sure one would work inside a ship's cabin, but what about on the outside windows? submitted by ctrl_ex [link] [10 comments]

Why does a 2 degree temperature change have such dramatic effects on weather (such as superstorms, massive tornadoes, floods ect)? Posted: 28 Dec 2015 07:11 AM PST This is an X post from r/explainitlikeimfive but unfortunately, nobody there seems to get it either. Why does 2 degrees (C) push us over the tipping point and why is our climate so venerable to a relatively small change, especially when the earths temperature varies ~75 degrees pole to pole? 1) yes 5*1022 joules is a lot but again, compared to the massive amount of energy already present and the even larger amount of energy being received and radiated by the sun, it is almost nothing. 2) there is no inherent reason for the earth to be finely tuned. I am asking why it is. Simply saying it is finely tuned does not help. 3) I am not talking about life. I don't care if life is finely tuned (and I get why it is) I am talking about weather 4) simply stating what will happen (like saying lakes all over will melt) without tying it back to the whole world is not helpful. 5) Please ignore people trying to bring in politics. submitted by pikaras [link] [33 comments]

In Genetics, is there an actual distinction between distant, but linked loci, and unlinked loci? Posted: 28 Dec 2015 10:54 AM PST My textbook says that distant, but linked, loci will always have a Recombination Fraction of 50cM. This means that they will segregate independently though, so is there any real reason to call them linked? submitted by adamwizzy [link] [2 comments]

What is the renormalization group? Posted: 29 Dec 2015 01:41 AM PST submitted by WhereofWeCannotSpeak [link] [comment]

What is the physical quantity of the gravitational constant? Posted: 29 Dec 2015 01:39 AM PST G is roughly 6.67x10-11 m3 kg-1 s-2 . So m is length, m/s is speed, m/s2 is acceleration, g is weight but what is m3 kg-1 s-2 or N m2 /kg2 . What does the unit mean and do we use it anywhere else? submitted by NobleMarshmallow [link] [1 comment]

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