If you're deeper into the earth, how does it affect escape velocity? |
- If you're deeper into the earth, how does it affect escape velocity?
- Is there an intuitive way to understand the Gauss-Bonnet theorem?
- How can baryons consisting of the same type of quarks have different masses?
- Do particles in quantum physics need a photon of exact wavelength excite their energy state?
- Earth From Space - Why is there photoshopped clouds on official NASA.gov imagine of Earth? (no conspiracy warrior)
- For the Apollo missions, how did the lunar modules protect the astronauts from radiation from the Van Allen belt and space debris?
- How does rocket propulsion work in space?
- Why are humans exhausted when sleep deprived?
- Why is fluoride added to municipal water supplies and then again in tooth paste? [chemistry]
- If rogue waves occur in the ocean, and rogue sound waves also occur?
- How do we know the chemistry of other celestial bodies in the universe?
- How do rockets prevent electrostatic discharges within their exhaust plume as seen in volcanic eruptions?
- When you combine 2 liquids at different ratios, why is the combined viscosity curve not a linear function between viscosities of the two liquids?
- How much mass can Lagrange points 4 and 5 support in relation to the sun-earth?
- What is a Computing Core?
- Do gravitational waves add up or cancel each other out in amplitude like sound waves do when two run into each other?
- How does qubit work?
- Is the wave function of a particle only a mathematical description or is it actually some sort of wave. Is there any difference between something being a wave function and being a wave?
- If a set of sequences are generated recursively from previous sequences an arbitrary number of times (L), does a closed form expression exist for the i^th element in a sequence at depth L? More details and a specific sequence in post.
- What number has the highest ratio of integer factors to magnitude?
| If you're deeper into the earth, how does it affect escape velocity? Posted: 11 May 2017 05:27 PM PDT Hello! I have been watching Cosmos by Neil DeGrasse Tyson again recently and, after he sparked my interest about escape velocity, I began to Google and try to find what it would take for the sun to escape the Milky Way. The equation for escape velocity being √2GM/r, and knowing that the Sun does not sit at the edge of the Milky Way, I began to wonder: If you're deeper in the ground (on Earth) does the escape velocity change. The radius effectively lowers, which would make the escape velocity more. However, the mass put into the equation also lowers, which will make the escape velocity less. So, what would happen in a realistic scenario? Would the escape velocity be higher or lower or am I completely wrong about this whole thing? If you have any ideas, I'd love to know. [link] [comments]  |
| Is there an intuitive way to understand the Gauss-Bonnet theorem? Posted: 11 May 2017 04:16 PM PDT |
| How can baryons consisting of the same type of quarks have different masses? Posted: 11 May 2017 02:36 PM PDT I just learnd that there are baryons which consist of the same quarks, like neutrons and Δ0 , but have different masses. Where does this additional mass come from? [link] [comments]  |
| Do particles in quantum physics need a photon of exact wavelength excite their energy state? Posted: 12 May 2017 12:50 AM PDT In quantum physics there are many problems where a particle has several allowed energy states. It can jump between those states by emitting/absorbing a photon with respective energy/wavelength. This is observed in atoms light spectra. When excited, atoms only emit light of certain wavelengths. The spectral lines are very sharp and experimentalists brag that they can measure their wavelengths much more accurately than theoretical physicists can predict them. However, how much does this accuracy matter when absorption is concerned? For example, hydrogen atom requires a photon of 121.57 nm to excite from 1st energy level to the 2nd. But what if a photon of 121.56 nm comes by? Does something happen or does the hydrogen atom wait for a photon of exactly 121.57 nm? How picky is he? Assuming we would know this wavelength to 25 decimals, would the hydrogen atom absorb a photon whose wavelength would differ in its 25th decimal? I've heard about the Zeeman effect, which can change the energy levels a little bit, but the way I understand it, it only changes the wavelengths of the spectral lines, but doesn't give certain "tolerance" of wavelength. Just finishing my undergrad in physics. [link] [comments]  |
| Posted: 12 May 2017 03:05 AM PDT So my little brother (3rd grade) is learning about the solar system. I was trying to explain the sunsets/raises, so I googled "earth from space". The first image that shows up is labeled "1-bluemarble_west, the first imagine in google images, and it is NASA.gov website. After staring at the clouds, I started noticing that a LOT of the clouds, entire formations of clouds even, were duplicated and basically literally copy/paste. Im not some conspiracy theorist, I am an educated young guy with no mental history. My concerns are logical and valid: Why is the first imagine on google, of Earth from NASA have fake clouds? heres link to the google imagine I am referring to: https://www.nasa.gov/sites/default/files/1-bluemarble_west.jpg [link] [comments]  |
| Posted: 11 May 2017 03:44 PM PDT With the strong radiation from the van Allen belts, wouldn't there be some impact on the astronauts health? The lunar module doesn't have that much protection from radiation but the astronauts seemed to be unharmed after their trips. Also, the shielding for the modules wasn't that thick or substantial whatsoever, how could they have come out of it unscathed? [link] [comments]  |
| How does rocket propulsion work in space? Posted: 12 May 2017 07:25 AM PDT after leaving the earth, there is no more air, so how does the pressure in the rockets work when, to my understanding it basically uses pressure in order thrust itself... is it just pressurized air? how much thrust does that give compared to a rocket on earth. i may be asking a dumb question, or not understanding it correctly, sorry :X [link] [comments]  |
| Why are humans exhausted when sleep deprived? Posted: 12 May 2017 06:59 AM PDT What causes this type of exhaustion? I'm not even talking about complete sleep deprivation, just not getting enough sleep. Is this tiredness also connected to calorie intake (which we obviously need to keep on a certain level in order to produce energy we can later spend on various activities)? [link] [comments]  |
| Why is fluoride added to municipal water supplies and then again in tooth paste? [chemistry] Posted: 12 May 2017 06:56 AM PDT A recent discussion popped up on our community web site asking if fluoride was added to the local water. Links were posted by those opposed to it, but those links seemed more like anti-vax type web sites. Other links popped up supporting the ADA position, but some people didn't trust that either. [link] [comments]  |
| If rogue waves occur in the ocean, and rogue sound waves also occur? Posted: 12 May 2017 06:35 AM PDT To my knowledge a rogue wave occurs when lots of smaller waves converge in the right way. My question is, does this happen with sound waves? Could a loud booming sound occur at random from the confluence of many low amplitude waves? [link] [comments]  |
| How do we know the chemistry of other celestial bodies in the universe? Posted: 11 May 2017 04:11 PM PDT We are able to figure out the elemental makeup of nebula clouds, asteroids, and even the atmospheres of exoplanets. How is this? Are these just calculations based on objects in the solar system? Or is there a way to detect the chemical makeup of things lightyears away? [link] [comments]  |
| Posted: 12 May 2017 01:20 AM PDT Volcanic eruptions generate massive thunder within their plumes due to the friction between ash particles. How do rockets avoid static sparks like this in the high pressure exhaust that can charge with static and generation of ions from heat? [link] [comments]  |
| Posted: 12 May 2017 04:17 AM PDT Until I actually did this experiment at several different ratios, I thought the combined viscosity curve would be a straight line between 100/0% and 0/100% of the starting viscosities of the two materials. Is this universal, or only with certain (like non-Newtonian) fluids? [link] [comments]  |
| How much mass can Lagrange points 4 and 5 support in relation to the sun-earth? Posted: 12 May 2017 12:18 AM PDT Hope I worded that coherently... I have no scientific background but have been reading up on the Lagrange points. I know that point 4 and 5 are the most stable but haven't been able to find any information about the mass these points can support. Specifically, I'd like to know: 1) If a satellite were shot into orbit in one of these points, would it have to have less mass than the earth? 2) What is the maximum amount of of mass these points could support before the orbit became unstable? Thanks in advance for any answers! [link] [comments]  |
| Posted: 12 May 2017 01:51 AM PDT I wanna know what a core is and how it works. (Like Quad and Dual core) [link] [comments]  |
| Posted: 11 May 2017 11:09 AM PDT |
| Posted: 11 May 2017 02:24 PM PDT As far as I know, qubit is a term in quantum computing, where some information can be 1, 0 or both, which is quite different from conventional binary. I'm a little confused at how this works. [link] [comments]  |
| Posted: 11 May 2017 06:55 PM PDT In particle physics, particles are said to behave like a wave when they are not observed. Does this mean it's actually some sort of wave or is it just best described by a wave function? Or does a wave function only describe a wave? [link] [comments]  |
| Posted: 11 May 2017 01:13 PM PDT This question was prompted from this post. One of the replies mentioned a sequence generated by finding the number of partitions created when connecting n points around a circle. I was trying to find a closed form expression on my own so I pulled up a webpage that recursively calculated sequences based on the differences between elements, with the original sequence at the top. 1 2 4 8 16 31 57 99 L=5 I noticed that if layers are added to the top, the sequence more and more closely approximates 2i-1 close to i = 0. The next layer would be, 1, 2, 4, 8, 16, 32, 63, 120, … If S(L)(i) represents the ith element of layer L, with layer 1 being the bottom, then S(L)(i) = S(L)(i-1) + S(L-1)(i-1) and S(L)(1) = 1. Starting with the bottom layer and working up using summation notation and algebra, I found that S(1)(i) = 1; S(2)(i) = i; S(3)(i) = 1+i(i-1)/2; S(4)(i) = (i3 -3i2 +8i)/6 etc. It looks like the largest power in each layer is L-1, but then why does it seem heuristically that S(infinity)(i) = 2i-1 ? I believe a lower sequence here is, in a way, similar to a derivative function for the sequence above, so I considered this stack might resemble a polynomial approximation similar to a Taylor series at different expansion levels. However, the Taylor series for 2i-1 around 0 contains only logs at the different expansion levels I checked. Questions: I was wondering if there is a closed form solution for S(L)(i) in terms of L and i? If there is a closed form solution for this particular "stack" of sequences, does a closed form solution always exist for "stacks" of sequences such as these? I'm not sure that since the functions themselves are changing and at discrete jumps, that the concept of a limit even remotely applies. However, is there a reason that it seems the limit as L -> infinity of S(L)(i) is equal to 2i-1? Bonus: is there a reason that the sequence detailing the partitions in a circle appears on the fifth layer of this particular stack that starts with all 1's? [link] [comments]  |
| What number has the highest ratio of integer factors to magnitude? Posted: 11 May 2017 09:22 AM PDT Not including itself and 1. Is there a definite answer? (i.e. 12 has factors 2,3,4,6, there are 4, so the ratio is 4/12 = 1/3) [link] [comments]  |
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