Why are there so few lakes in South America? |
- Why are there so few lakes in South America?
- If you are inside a perfectly sealed, hollow metal sphere, would an electric current applied to the outside of the sphere affect you considering electricity travels along a surface?
- If a substance of any kind gives off an odor then does that mean it's losing mass even if it's on a very small scale?
- Do our bodies adjust physiologically to changing seasons/temperature?
- [physics]Can a fusion reactor be designed to fuse elements heavier than hydrogen?
- What would the discovery of a Lorentz Violation imply?
- Why does mucus dry out when you sleep?
- Might some irrational numbers be a terminating decimal in another base?
- Why doesn't the electromagnetic force have the property of asymptotic freedom?
- Why is YBCO used in superconducting wires instead of higher temperature superconductors like HgTlBaCaCuO or SrFFeAs?
- How can doctors tell if you've had a heart attack well after the event?
- Why is non-linearity such an obstacle in solving differential equations?
- Audio interpretation coupled with visual input - does one affect the other?
- How does heat effect radiometric dating?
- How do we know HIV has only been around a few decades? Isn't it possible, for example, that a few people had it a century ago but nobody noticed because they seemed to die of pneumonia?
- Do clothes with sweat wicking fabric prevent your body from cooling itself by not allowing sweat to evaporate?
- Why doesn't B-cell VDJ rearrangement produce TRECs?
- If the 3' hydroxyl group is the only location for nucleotides in DNA, is the 2' hydroxyl group on RNA a place where nucleotides can bond as well?
- Can we see back to the big bang?
- How does lightning interfere with AM radio and not FM?
- What impact do adverse effects have on the placebo effect?
- Can normal light provide Vitamin D or is that something only Sunlight can do?
| Why are there so few lakes in South America? Posted: 03 Nov 2016 11:29 AM PDT South America receives plenty of water, but has few natural lakes, and these are smaller, contrasted to other continents. Australia has few as well, but is considerably drier. What about South America makes it less likely to form lakes? [link] [comments]  |
| Posted: 03 Nov 2016 07:04 PM PDT Edit: specifically, I'm under the impression that in an electrical cable, the electricity travels on the outside of the copper wires, so in this scenario, would any electricity penetrate the sphere or would the fact that electricity travels on the surface mean you would be protected [link] [comments]  |
| Posted: 03 Nov 2016 12:19 PM PDT Example -- If I have a container of poop and open the lid I start to smell poop. So my thinking is that if it smells like poop then it must have been a part of the substance in the container but is no more and free to roam about the air I breathe. So the original substance it came from must be lighter in weight because some of it is free and allowing me to smell it. [link] [comments]  |
| Do our bodies adjust physiologically to changing seasons/temperature? Posted: 03 Nov 2016 09:44 AM PDT I've noticed that in the fall as the temperature starts to drop I always feel cold; but, in the spring time the exact same temperatures feel comfortable or even warm. Is this phenomenon purely psychological or do our bodies adjust in some way for the changing seasons. [link] [comments]  |
| [physics]Can a fusion reactor be designed to fuse elements heavier than hydrogen? Posted: 03 Nov 2016 09:51 PM PDT In partucular, could a reactor be made that would fuse the helium a hydrogen fusion reactor would leave behind? Could this process be repeated until we are left with iron? [link] [comments]  |
| What would the discovery of a Lorentz Violation imply? Posted: 03 Nov 2016 10:29 PM PDT |
| Why does mucus dry out when you sleep? Posted: 03 Nov 2016 01:54 PM PDT |
| Might some irrational numbers be a terminating decimal in another base? Posted: 03 Nov 2016 06:05 PM PDT For example, would 1/3 be a terminating decimal in another base? What about the square root of two? I can't find any calculators for different bases with decimals anywhere, so I wanted to see what you guys could tell me about this. [link] [comments]  |
| Why doesn't the electromagnetic force have the property of asymptotic freedom? Posted: 03 Nov 2016 03:59 PM PDT My understanding is that the colour of a quark is distributed throughout space so that it becomes whiter the closer you get to the centre. Shouldn't the measured charge also decrease as you get closer and closer to the centre (in the same way the gravitational field goes to 0 at the centre of the earth)? I understand that the electron's electric field causes a preferred direction of electron-positron fluctuations leading to vacuum polarization and causing a screening effect which makes the measured electron charge less that the true charge but I can't see a difference between the two cases. Shouldn't there also be gluon fluctuations that have give rise to the same screening effect as the electromagnetic force? [link] [comments]  |
| Posted: 03 Nov 2016 01:53 PM PDT There are many higher temperature superconductors than YBCO (graph here ) but why is YBCO always used? The ones that require high pressures to exhibit superconductivity are the only ones that make sense because it would be much more expensive to decrease the temperature and increasing pressure. [link] [comments]  |
| How can doctors tell if you've had a heart attack well after the event? Posted: 03 Nov 2016 12:37 PM PDT I had a family friend recently suffer a heart attack and she said that for a week she was feeling really bad and slightly disoriented. She went to the doctor and they said she had a heart attack earlier in the week. How do they determine that? Are there biological markers that stick around for a while? How long? Is something permanently changed in your body from that point? [link] [comments]  |
| Why is non-linearity such an obstacle in solving differential equations? Posted: 03 Nov 2016 10:18 AM PDT |
| Audio interpretation coupled with visual input - does one affect the other? Posted: 03 Nov 2016 12:27 PM PDT Hey, Thanks [link] [comments]  |
| How does heat effect radiometric dating? Posted: 03 Nov 2016 11:05 AM PDT I am an accounting major taking an astronomy course so I am not educated on physics. My professor was speaking about radiometric dating of rocks here on Earth and explained that radiometric dating is not as effective on meteorites as they have been heated up. Someone asked the question of why this is the case since If uranium decays to lead then the composition of the rock did not change, it is still uranium/lead and other material so how does the atomic clock reset? He didn't really know how to answer it or just could not articulate it. [link] [comments]  |
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| Why doesn't B-cell VDJ rearrangement produce TRECs? Posted: 03 Nov 2016 01:01 PM PDT Aside from the fact that TREC stands for "T-cell receptor excision circle," I don't quite understand why they don't occur in B-cells. How does VDJ rearrangement take place in B-cells without producing these hairpin loops? What happens to the extra material? [link] [comments]  |
| Posted: 03 Nov 2016 09:56 AM PDT Question came up in my intro bio class and the professor didn't have an answer. I was also wondering if this may contribute to the linear shape of RNA as opposed to the helical shape of DNA [link] [comments]  |
| Can we see back to the big bang? Posted: 03 Nov 2016 05:51 AM PDT Okay so I could be wrong about this but my understanding is the big bang resulted in our expanding universe. I believe the expansion was so fast that the mass of our universe expanded faster than the speed of light hence there being an event horizon that we cannot see past as light has not traveled that far. Now if for some reason there was an incredibly large reflective object at the edge of the light event horizon, would we be able to see the moment of the big bang by looking at it? The time for the light to reach it and bounce back would give us a look of the big bang as it happened no? [link] [comments]  |
| How does lightning interfere with AM radio and not FM? Posted: 03 Nov 2016 09:14 AM PDT |
| What impact do adverse effects have on the placebo effect? Posted: 03 Nov 2016 06:41 AM PDT E.g. if a patient with depression would take a pill that "doesn't do anything" but cause mild nausea, could this alone enhance his believe that the medication is potent, hence enhance the placebo effect? Wouldn't any medication with side effects have an advantage over a sugar pill in a placebo controlled study? [link] [comments]  |
| Can normal light provide Vitamin D or is that something only Sunlight can do? Posted: 03 Nov 2016 06:23 AM PDT I imagine if you left someone in a dark room, they'd get weak legs, and we say they need sunlight. What if I put a candle or light bulb, will there be a positive difference? Does it depend on wavelength or some other physical factor or something else entirely? Also, what is the process behind the scenes, what happens to cause this effect in humans? [link] [comments]  |
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