How do blue whales sleep? |
- How do blue whales sleep?
- Could the 2D geometry of quantum dots allow for easier or higher-temperature superconductors?
- Why did these leaves near the street lamp turn red earlier than the rest?
- Why do desktop fans look more like boat propellers than aircraft propellers?
- Is deriving symetric?
- How is it possible for galaxies at the edge of the universe to travel faster than the speed of light?
- Long after a major meteorite impact, does seismic activity around the crater increase or decrease?
- What would the night sky be like on a planet near to the core of the galaxy?
- Are there any real photos of Black Holes, or are all "pictures" simply artist renditions?
- Why do some minerals crystallize into cubes while others form hexagons?
- first derivative of a curve equal to 0 indicates a minimum or maximum point. Second derivative equal to zero indicates a point of inflection. Does the third derivative being zero mean something as well?
- Does general relativity really affect GPS?
- Does acceleration decrease as velocity increases??
- [Physics] What are the maths behind the wavefunction psi?
- Why is e-e+ -> μ-μ+ such an important reaction?
- [Physics] In a hypothetical empty universe, a single hydrogen atom pops into existence. Will that atom remain as an atom forever?
- Why are Sierpinski numbers important and what are they used for?
- Why are there no volcanoes or trenches at the bottom of the ring of fire?
- Why did it take longer to find the Higgs than the top quark?
| Posted: 28 Nov 2016 03:28 PM PST The wikipedia article didn't say and google results were inconclusive. Thanks! [link] [comments]  |
| Could the 2D geometry of quantum dots allow for easier or higher-temperature superconductors? Posted: 29 Nov 2016 06:57 AM PST I'm giving my students a quiz today and just had a musing about this. Quantum dots are 2D pseudo-atoms, per my understanding, which have unique and different electron orbitals due to the 2D nature of the Q.dot. I thought I would ask more learned heads than my own. [link] [comments]  |
| Why did these leaves near the street lamp turn red earlier than the rest? Posted: 28 Nov 2016 11:45 PM PST I posted this photo to /r/mildlyinteresting yesterday, nobody there seem to have a definite explanation so far. Does anybody know why these leaves that are closer to a street lamp turned red earlier than the rest? [link] [comments]  |
| Why do desktop fans look more like boat propellers than aircraft propellers? Posted: 28 Nov 2016 08:09 PM PST |
| Posted: 29 Nov 2016 07:25 AM PST Usually derivation is explained like how the function changed when the variable changed. The way we do it is comparing the current point with a close previous one. (f(x)-f(x-h))/h with small h My question here is, can we compare the current point with the close next one? Like doing a mirror at x (f(x+h)-f(x))/h with small h I did a few tries with simple functions and it's working and makes sense but I don't know if it's something general or not. [link] [comments]  |
| Posted: 28 Nov 2016 10:33 PM PST I watched recently a video on how dark energy makes it possible for galaxies to move faster than the speed of light. I still don't understand how though because I've always thought the speed cap for any object is the speed of light! [link] [comments]  |
| Long after a major meteorite impact, does seismic activity around the crater increase or decrease? Posted: 28 Nov 2016 04:57 PM PST For example, after the KT extinction impact. Does such an impact force a release of seismic stress? Cause more stress? Have no effect? [link] [comments]  |
| What would the night sky be like on a planet near to the core of the galaxy? Posted: 28 Nov 2016 12:16 PM PST Since the density of stars grows as we approach the center of the milky way, I wonder if the night sky on a planet similar to ours would be brighter than it is here. [link] [comments]  |
| Are there any real photos of Black Holes, or are all "pictures" simply artist renditions? Posted: 28 Nov 2016 12:26 PM PST I cant seem to figure out if there are any real pictures of a Black Hole. I was thinking that becasue no light can escape it, and all light that touches it enters it, would it even be posible for us to see a black hole, or would we just see everything around it and infer that their must be a black hole there? [link] [comments]  |
| Why do some minerals crystallize into cubes while others form hexagons? Posted: 28 Nov 2016 08:01 PM PST |
| Posted: 28 Nov 2016 02:54 PM PST |
| Does general relativity really affect GPS? Posted: 28 Nov 2016 03:32 PM PST Various (seemingly reliable) sources on the internet seem to suggest that GPS must account for time dilation due to the Earth's gravitational field. It seems to me, however, that since all of the satellites are at about the same altitude, we should expect this time dilation to affect all of them equally and thus have no effect on the position determined by the receiver. What am I missing? [link] [comments]  |
| Does acceleration decrease as velocity increases?? Posted: 28 Nov 2016 04:34 PM PST So everyone knows that achieving the speed of light is impossible. So say for instance you were on a spacecraft at a velocity just below the speed of light, and you continued to have the same amount of thrust as in speeds prior. What would happen to your acceleration? Would you not be able to accelerate to or past the speed of light? That being said, would the same principle apply for velocity in general? As your velocity increases your acceleration decreases? Would, with the same amount of thrust, your acceleration differ from flying through space at 3,000 mph and flying through space at 100,000 mph. I'm sure there's a sturdy explanation to this but I just thought about this today and thought I should share. Also, hope I've explained my mind well enough. Thank you for your time, Caleb [link] [comments]  |
| [Physics] What are the maths behind the wavefunction psi? Posted: 28 Nov 2016 08:18 PM PST Hi, we had the wave/particle duality for electrons in the lecture today and described the different orbitals with it. Furthermore we spoke about the mathematical/theoretical concept behind it briely. But now im asking myself what the wavefunction is! [link] [comments]  |
| Why is e-e+ -> μ-μ+ such an important reaction? Posted: 28 Nov 2016 10:23 AM PST It's the first example of "real" process worked out in Peskin and Schroeder, and they mention that it's used as a calibration for detectors. Can anyone tell me about this? Specifically, I'd naively expect e- e+ -> e- e+ to be easier to observe, because the right-hand mass is lower. It's possible I could answer the question by computing the cross-section myself, or reading more, but I'm a mathematician and don't know anything about experiments so I'd probably get it wrong. [link] [comments]  |
| Posted: 28 Nov 2016 03:13 AM PST If not, what will be the first thing that makes the hydrogen atom no longer an atom? Some bizarre quantum stuffs? [link] [comments]  |
| Why are Sierpinski numbers important and what are they used for? Posted: 28 Nov 2016 04:47 AM PST related news: "At more than 9 million digits long, the new prime number is the seventh largest prime ever found, and it just cut the six possible candidates for the elusive Sierpinski number down to five." Why are Sierpinski numbers important and what are they used for? [link] [comments]  |
| Why are there no volcanoes or trenches at the bottom of the ring of fire? Posted: 28 Nov 2016 12:30 PM PST Like this. My friend suggested that it is because they are close to the poles, but she thought that also might not be the case because there are volcanoes very far north. [link] [comments]  |
| Why did it take longer to find the Higgs than the top quark? Posted: 28 Nov 2016 07:26 AM PST So as best we can tell, the top quark is about 35-40% heavier than the Higgs and decays in a few hundredths of the time. Why were we able to confirm the top so much earlier and at much less energy than needed for the Higgs? [link] [comments]  |
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