If you uniformly heated a body of water to boiling, where would the bubbles form? |
- If you uniformly heated a body of water to boiling, where would the bubbles form?
- How much water is there under the earths surface? Will springs ever stop producing water?
- Why are song tunes much more easily remembered than the lyrics?
- Can molecules with nearly identical composition affect each others' equilibrium constants and kinetics in solution?
- Are all wavelengths of EM radiation, for which an optical lens is transparent, refracted by it?
- Why doesn't Chandrasekhar's limit apply to a supermassive star's (<50 solar masses) core when it super/hypernovas?
- Why do asteroid belts form, rather than additional planets?
- Is light visible?
- How many tuples can you construct from a multiset?
- What's the experimental evidence for neutrino flavours?
- Why would/does breathing into a paper bag help panic attacks?
- Approximately what fraction of mouse model study results are replicated in human trials?
- Why is space debris such a challenge to clean?
- [Biology] How do antibodies work and why has there never been a case of bacterial resistance to such antibodies?
- Can we feel (detect) acceleration?
- Would collecting the bacteria enzymes from rabbit cecal and soaking cellulose in the enzymes over a period of time allow for humans to digest cellulose?
- What ingredients/methods of baking/chemicals make one type of bread more prone to mold than others?
- Is cancer becoming more rampant?
- Why stars doesn't visibly disappear regularly if there is so much space junk between us and them?
- Do the nutritional values in food decrease every time you heat it back up?
- How do Epson salt baths help muscle pain? How and why?
- If the so called "periodical cicadas" (the infamous 13 and 17-year cicadas) emerge and reproduce in 13 and 17 year cycles, does that mean that every 221 years there will be a year when both types of periodical cicada will emerge?
| If you uniformly heated a body of water to boiling, where would the bubbles form? Posted: 15 Jan 2016 10:13 AM PST I have a feeling that the answer is "from the bottom, because gravity." but I don't know or know why. Also, what if it were a sphere of water in space heated uniformly, would it bubble at all as it evaporated? [link] [395 comments]  |
| How much water is there under the earths surface? Will springs ever stop producing water? Posted: 15 Jan 2016 08:30 AM PST Curious as to whether or not it's possible we can run out of water? [link] [36 comments]  |
| Why are song tunes much more easily remembered than the lyrics? Posted: 15 Jan 2016 10:43 PM PST It's always easier to recall a tune than the lyrics to that tune, and I find this intriguing as words can be paired with physical objects and experiences, unlike notes. [link] [6 comments]  |
| Posted: 15 Jan 2016 08:42 AM PST For example, glucose and glucose-6-phosphate have different equilibriums and kinetics in vivo because of the presence of the phosphate group. Diffusion of glucose into a cell is independent of the concentration of glucose-6-phosphate. However, what about for a large polypeptide that is permeable to the cell membrane, with an extra H+ or a PO4- that does not affect its chemical properties? Does the concentration of the protonated or phosphorylated (or any slight modification, really) polypeptide affect the diffusion of the unmodified protein? If it does not, how do we define the point at which a molecule is considered an independent solute with its own equilibrium? [link] [8 comments]  |
| Are all wavelengths of EM radiation, for which an optical lens is transparent, refracted by it? Posted: 16 Jan 2016 05:54 AM PST |
| Posted: 16 Jan 2016 03:09 AM PST I currently only have wikipedia quotes as sources but here is what I have read and understand. When a star is massive enough (10-50SM), over time through fusion their cores will reach a point where they are composed of nickle and iron. The core will continue to grow in mass until it reaches Chandrasekhar's limit of 1.4SM before collapsing in a type II supernova. However, when regarding a supermassive star of >50SM which result in collapsars, the core (I'm assuming still nickle/iron?) can exceed Chandrasekhar's limit and reach that of 5-15SM before experiencing gravitational collapse in a type Ib/c (or maybe type II?) super/hypernova. Is there something I'm missing? Maybe I'm not understanding something correctly? Any incite is appreciated. Thanks! https://en.wikipedia.org/wiki/Hypernova#Collapsar_model First and 2nd paragraphs https://en.wikipedia.org/wiki/Type_II_supernova#Core_collapse 2nd paragraph. https://en.wikipedia.org/wiki/Type_Ib_and_Ic_supernovae#Formation [link] [comment]  |
| Why do asteroid belts form, rather than additional planets? Posted: 15 Jan 2016 09:55 PM PST Bonus question, why do some planets have rings, rather than additional moons? [link] [2 comments]  |
| Posted: 16 Jan 2016 07:28 AM PST |
| How many tuples can you construct from a multiset? Posted: 16 Jan 2016 02:58 AM PST Say I have the multiset {1,2,3,4,5,6,6,7,7,8,8}. How many distinct tuples (order matters) can be constructed using elements of the multiset? (for a tuple in this example the 1 can be used 0 or 1 time, the 6 can be used 0, 1 or 2 times) [link] [comment]  |
| What's the experimental evidence for neutrino flavours? Posted: 16 Jan 2016 06:30 AM PST How do we know there are different neutrino flavours and that there are only 3? How can a detector tell the difference between muon neutrinos and electron neutrinos? I'm a final year undergraduate and know a reasonable amount of particle physics in general, so feel free to get technical. Every time I google this I just get stuff about neutrino oscillations instead. [link] [2 comments]  |
| Why would/does breathing into a paper bag help panic attacks? Posted: 15 Jan 2016 10:51 PM PST Seen it a lot in pop culture, people start having panic attacks or get extremely anxious they breathe into paper bags. Does it work? Why would it work? I don't understand. [link] [9 comments]  |
| Approximately what fraction of mouse model study results are replicated in human trials? Posted: 15 Jan 2016 09:35 PM PST In other words, if I see a mouse model study that shows (unambiguously and with high confidence) that drug X is good or bad for Y, roughly speaking what probability should I assign the likelihood that the results of the study apply to humans? I understand this might be different for different areas of research, and I understand this isn't a binary thing (for example a mouse model might show more or less effect of drug X, on a spectrum, relative to humans), but I'm looking for an order-of-magnitude estimate for how seriously I should interpret mouse model data when no human data are available. I would sort of expect that someone has done this meta-analysis already. [link] [5 comments]  |
| Why is space debris such a challenge to clean? Posted: 16 Jan 2016 06:16 AM PST I saw an article saying that even paint chips can breach spacecraft and cause huge problems. Why can't we "armor" ships or something or protect them some other way? [link] [3 comments]  |
| Posted: 15 Jan 2016 08:37 AM PST |
| Can we feel (detect) acceleration? Posted: 15 Jan 2016 11:37 PM PST I was watching a video on relativity, and in it the professor said that the feeling/sensation of falling (free fall) is indistinguishable from that of being in space with no acceleration. (Cited) He went on to explain that the feeling we get from being in free fall comes from the absence of the normal forces that hold us up. When in free fall, wouldn't our inner-ears be able to feel when we are accelerating at 9.8 m/s2 ? [link] [10 comments]  |
| Posted: 15 Jan 2016 06:32 PM PST http://dujs.dartmouth.edu/fall-2010/turning-waste-into-food-cellulose-digestion http://www.typesofbacteria.co.uk/friendly-bacteria-digestive-system.html If I am correct; would it be possible to genetically engineer these cellulose loving bacteria to survive in the human intestine? Maybe, through selective breeding by wiping out sequential populations of the bacteria in the same conditions they would experience in the human gut... and selecting the "survivors" for so many generations. Then, maybe test to see if these engineered bacteria do not disrupt normal functioning in the gut. If it's true that these bacteria rabbits use in digestion can also be used [link] [comment]  |
| What ingredients/methods of baking/chemicals make one type of bread more prone to mold than others? Posted: 15 Jan 2016 08:06 PM PST I know this might seem a bit silly, but it's a genuine question! I've noticed my potato bread never molds, even after very long streches of time. However, plain white bread seems to mold within a week. Do Rye/Potato/White/Sourdough all really have different tendencies to mold, or is that just my imagination? If it's the case, why? [link] [1 comment]  |
| Is cancer becoming more rampant? Posted: 15 Jan 2016 06:55 PM PST Is it just because a lot of other diseases have been cut back or is there an increase in people getting cancer? [link] [6 comments]  |
| Why stars doesn't visibly disappear regularly if there is so much space junk between us and them? Posted: 16 Jan 2016 04:11 AM PST When I'm looking at night sky, I can see stars - obvious, but between me and stars is so much of space junk like Oort cloud etc, and yet I never saw a star that would disappear for a while because some space object got between me and this star. Why is that? [link] [1 comment]  |
| Do the nutritional values in food decrease every time you heat it back up? Posted: 15 Jan 2016 06:41 PM PST |
| How do Epson salt baths help muscle pain? How and why? Posted: 15 Jan 2016 07:34 PM PST I was googling, and I found so much contradictory information, and no real explanations as to why bathing in Epson salts is better than just a regular hot water bath. [link] [2 comments]  |
| Posted: 15 Jan 2016 08:49 PM PST I was just wondering if there would ever be a situation when both the 17 and 13 year cicadas emerged at the same time and caused the worst cicada swarm ever, or at least emerged at different times in the year and produce two separate swarms. If this is so, what sort of ecological impacts would this have had or has had? Also, does anyone know when the next 13 or 17 year cicada swarm will be? [link] [3 comments]  |
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