Do the holes on a dice which represent the numbers affect the chances of getting different numbers? |
- Do the holes on a dice which represent the numbers affect the chances of getting different numbers?
- Why is the nozzle on a rocket engine designed to reduce the gas pressure to the external pressure ? How is it more efficient ?
- How quickly would dominoes fall in stronger or weaker gravity?
- If two particles are entangled, and I measure the momentum on one while simultaneously measuring the position of the second particle, wont I now know both the position and momentum of the second particle at the same time, violating the principle of complementarity?
- Could you answer a few questions about neutron stars?
- Can you measure mass without acceleration?
- Is the total angular momentum of all bodies in the universe conserved as a whole?
- Why can transistors be so small, but resistors capacitors and other components are comparatively large?
- If I'm traveling *very* fast and I hit a photon, will it hit me like a higher energy photon?
- What's the (theoretical?) limit of the compression of matter? More on comments
- Is there any evidence that automated/touchless public bathrooms actually reduce the spread of disease?
- Does global warming affect geology?
- Is The Mass of The Universe Constant?
- Does the equipartition theorem apply to a guitar string?
- Does gravity affect the measurement of time or the actual passage of time itself?
- How can you figure out the rotational spin of a planet in other system?
- All objects in a black hole reach the singularity in finite time, yet the singularity is not within spacetime and is infinitely far from the event horizon. How does something travel infinite distance in finite time?
- Why does nitric acid digestion work better when diluted?
| Do the holes on a dice which represent the numbers affect the chances of getting different numbers? Posted: 16 Jul 2016 07:05 AM PDT 6 holes for number 6, 5 for 5 and so on. Dont these holes make the dice non symmetric and make the air affects it in different ways? also why manufacturers dont paint numbers instead of holes? [link] [comments]  |
| Posted: 16 Jul 2016 06:06 AM PDT I've been learning on my own how rocket engines works (well approximately), and I've understood the part about the third law of motion and conservation of momentum. But I don't understand the pressure related aspect of such engines. I've seen that depending on what altitude you mean to use it, you have to elongate the nozzle so that the pressure reduces as much as possible until at the end of the nozzle, it is equal to the external pressure. But I would think that to increase the speed of the exhaust gas, one would need high pressure gas so that it wants to go even faster out of the engine ? Also I don't really understand the need for pressurizing the gas before the combustion chamber : is it to help combustion ? To reduce the size/weight of the combustion chamber ? Thanks if you answer ! [link] [comments]  |
| How quickly would dominoes fall in stronger or weaker gravity? Posted: 16 Jul 2016 06:39 AM PDT |
| Posted: 15 Jul 2016 10:36 PM PDT I was just reading on quantum entanglement and this came to my mind, and I couldn't think of any solution. [link] [comments]  |
| Could you answer a few questions about neutron stars? Posted: 15 Jul 2016 04:12 PM PDT 1) What would happen if you removed say 99% of the matter that makes up a neutron star? would the remaining matter fly apart into protons, electrons etc as its held together by the fierce gravitiy of the whole neutron star? 2) If two neutron stars collided would bits of them be blown off or would it all be held by the gravity of the two objects? is there a non-zero chance that 'neutron star bits and pieces' could impact the earth? also would the two just form a black hole? 3) if a neutron star began accreting matter from a 'regular' star (in a binary system or something) would the matter undergo nuclear fusion like in a regular star? Thanks, feel free to answer one, all, or none of the above [link] [comments]  |
| Can you measure mass without acceleration? Posted: 16 Jul 2016 05:16 AM PDT A kilogram is a measure of mass. On earth we weigh it with a scale, and in space we might try to accelerate an object and see how much force it takes. If for whatever reason we couldn't accelerate it, is there a way to measure it's mass? Also, now that I think about it, does this mean a person would technically be however many kilograms on earth or Mars, because if the definition? [link] [comments]  |
| Is the total angular momentum of all bodies in the universe conserved as a whole? Posted: 15 Jul 2016 08:55 AM PDT |
| Posted: 15 Jul 2016 09:16 AM PDT |
| If I'm traveling *very* fast and I hit a photon, will it hit me like a higher energy photon? Posted: 15 Jul 2016 05:34 PM PDT To restate the question, if I'm traveling at a significant fraction of the speed of light and I encounter a photon of non-ionizing radiation head-on, will the Doppler effect make it appear to me like ionizing radiation? Like an extreme blue shift? [link] [comments]  |
| What's the (theoretical?) limit of the compression of matter? More on comments Posted: 15 Jul 2016 12:32 PM PDT What keeps it from happening? Do black holes reach that point? If so, how could matter be compressed in a "single point" just before the Big Bang and still contain the matter that makes black holes and everything else? Was it gravity that kept it all together before the Big Bang? Am I feeling a bit too relativistic today? [link] [comments]  |
| Posted: 15 Jul 2016 10:55 AM PDT Not reduce the spread of germs. Just because a person picked up bacteria doesn't mean they got ill from it. And especially in light of the fact that many bathrooms only have some touchless features, and almost none have automatic doors. ETA: I imagine a nice study would be if a workplace upgraded their bathrooms and then looked to see if employees took fewer sick days afterwards. Because in a more public space it would be much more difficult to track whether people got sick or not. [link] [comments]  |
| Does global warming affect geology? Posted: 15 Jul 2016 08:03 PM PDT I watch a decent amount of documentary shows including things that talk about various points in prehistory. With the earth having gone through greater geological activity in the past, does that mean that as the temperature continues to rise, earthquakes and such will be more frequent? I could imagine the greater energy at an atomic level resulting in more active tectonic plates, but it's never discussed in any shows. [link] [comments]  |
| Is The Mass of The Universe Constant? Posted: 15 Jul 2016 09:04 AM PDT |
| Does the equipartition theorem apply to a guitar string? Posted: 15 Jul 2016 01:31 PM PDT I just read about the equipartition theorem, stating that for a system at equilibrium energy is equally shared among its possible forms. For a harmonic oscillator, I'm making an assumption that it would mean each overtone should have an equal amount of energy associated with it. If a finite amount of elastic potential energy is given to a string, and this energy is shared equally among an infinite number of overtones, does this mean each overtone has effectively zero energy associated with it? [link] [comments]  |
| Does gravity affect the measurement of time or the actual passage of time itself? Posted: 15 Jul 2016 08:40 AM PDT There's are two cars on Earth that are placed on treadmills. They both accelerate to the same speed and hold the speed indefinitely. One of the treadmills is then transported to Jupiter. Assume all environmental parameters between the two sites are the same, same car/air density/etc. Let's also assume communication between the two cars are instantaneous. Once the treadmill lands on Jupiter, both treadmills are stopped and the cars shoot out at whatever speed they were traveling at prior. After 1 hour as measured on earth, both cars are instructed to stop immediately. Has the car on Jupiter gone a different distance because time passes at a different rate or that its speed was different as time was measured at a different rate. [link] [comments]  |
| How can you figure out the rotational spin of a planet in other system? Posted: 15 Jul 2016 12:39 PM PDT I remember being told about a method by a Phd Student at Exeter Uni how they used the Doppler shifted light of the planet. But I didn't really understand. Can someone explain to me how and other methods are used? [link] [comments]  |
| Posted: 15 Jul 2016 10:58 AM PDT Where am I wrong? I'm guessing saying the singularity is infinitely far from the event horizon is wrong in some way, but I've heard it is not contained in the topography of spacetime and is essentially infinite in distance. [link] [comments]  |
| Why does nitric acid digestion work better when diluted? Posted: 15 Jul 2016 10:25 AM PDT Okay so i work with acid digestion of doree beads. The beads contain only silver and gold. We did a small experiment where we use concentrated nitric acid on pure silver to see if it would digestion. Nothing happened, we then added water to the acid and the digestion began to happen. We normaly use 50% v/v nitric for digestions. I'm curious as to why the concentrated nitric acid wont digest the silver. Thanks for any and all help [link] [comments]  |
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