Why don't we snore while awake? What changes in our breathing when we fall asleep? |
- Why don't we snore while awake? What changes in our breathing when we fall asleep?
- If two power plants feed AC voltage/current into the same electricity grid, how do we make sure they are in the same phase to not cancel out each other?
- Why does marijuana seem to help patients suffering from seizures? Have there been studies that worked out the specific biochemistry of how cannabinoids interrupt a seizure and/or reduce their frequency?
- Why prime numbers (and only them AFAIK) are giving me this plot?
- When you gain a lot of weight do your nerves and veins grow to accommodate the expanded surface area of your body?
- Is the net gravitational pull of a planet towards the centre of the planet, even though that is counteracted by the gravitational pull of matter on the opposite side of the planet?
- Why doesn't silicon sulfide have the same (or at least very similar) giant covalent structure as silicon dioxide?
- Black holes "slow down" time. Is there an astronomical phenomenon that "speeds up" time for a handful of people? Could we use it to "get ahead" in the galactic race for domination/survival?
- How did Einstein extrapolate black holes from General Relativity?
- Does hardware get slower / worse over time?
- Can noise exist/be detectable at a microscopic scale?
- Does a complex number have a polar form if the real part is 0?
- Why don't we use the Moon for gravity assists when sending probes into the rest of the solar system?
- Will eating 100ml of ice cubes hydrate you the same way as drinking 100ml of water?
- What would happen if a celestial body the size/mass of the moon hit the sun at 0.999c? What if it the object was Jupiter-sized?
- State space feedback controller design with a reference input?
- What would stop someone from 3D printing me a bomb and blowing me up?
- If Mars' atmosphere is predominately carbon dioxide, would it be possible to grow plants in an enclosure with proper protection from UV and dust storms?
- Why are BEC's not possible in a photon gas?
- How is diesel particulate filter (DFP) regeneration clean for the environment?
- Why does it take the same time to travel to NY->London and London->NY on an airplane, when one way is WITH the spin of the Earth, and the other is the AGAINST the spin of the Earth?
- Is Bohm's Interpretation of quantum mechanics still relevant in today's physics?
- How come ice cubes don't always float 9% above water?
- How does epinephrine (adrenaline) cause skeletal muscle twitching?
| Why don't we snore while awake? What changes in our breathing when we fall asleep? Posted: 07 Nov 2016 10:18 PM PST |
| Posted: 08 Nov 2016 01:37 AM PST If two power generators feed a sinusoidal voltage into the grid, but one has a phase difference of 180° to the other, wouldn't the voltages cancel each other out? So after the voltage of the power plant is transformed into the appropriate voltage, how do we make sure the voltages have appropriate phase differences? Or does it not make any difference what phase the feeded voltage of each power plant is? [link] [comments]  |
| Posted: 07 Nov 2016 10:16 PM PST I know that in many states where medicinal legalization is being talked about, often times powerful dialogue in the pro-legalization camp centers on children suffering from intractable seizures. It seems to me if people who are very anti-drug are somehow especially swayed by the idea that it benefits kids, there must be a lot of good research and evidence backing that up. I just don't know the research, and probably wouldn't totally understand the science if I read it for myself, but I'm incredibly curious. Thanks, wise ones! [link] [comments]  |
| Why prime numbers (and only them AFAIK) are giving me this plot? Posted: 07 Nov 2016 06:22 PM PST First of all, sorry if this question is dumb. I have been playing today with prime numbers and I have encountered something extremely intriguing (at least for me). I am a software developer and I have written a simple piece of code in Python just to play and see if I can spot some patterns and just for fun generally. I'm no mathematics expert, but I'm very intrigued of why a simple algorithm like this: is giving me this awesome chart http://imgur.com/vzCqBHt ? I have tried normal integers with multiple expressions, but it seems that only subsequent primes are giving this awesome image. Any mathematicians care to explain to me why is that? Thank you. [link] [comments]  |
| Posted: 07 Nov 2016 08:06 PM PST When you lose weight do your nerves and veins shrink? Also, do thinner people have more skin sensitivity due to nerve endings being more concentrated in a smaller surface area? [link] [comments]  |
| Posted: 08 Nov 2016 05:32 AM PST This is a very rudimentary question, I've drawn a picture to try and illustrate it. Its only just occurred to me that choosing 1 cubic meter of the earth at some point between the centre of the earth and the surface I should find that is it being pulled towards the core by some mass but towards the surface by the mass above it. So the net force is towards the centre, until you reach the centre, where the net force would be zero. In other words an object on earth is being pulled in literally all directions, it just so happens that the net force is towards the centre of the earth, because there is a great deal more mass on one side than the other. Is that correct? [link] [comments]  |
| Posted: 08 Nov 2016 06:51 AM PST |
| Posted: 08 Nov 2016 06:17 AM PST The question is serious, although it might sound like it's from a c-movie of sorts. You might need to cut me some slack here. From what I understand (and the movies tell me), time "slows down" considerably close to a black hole. It doesn't slow down noticably for the one being close to the black hole, only for the spectator far away. That's relativity, right? A couple of hours too close "make time fly" for the rest of the universe. Is there an opposite phenomenon, where times starts flying by for a few whereas the rest of the universe "slows down"? Maybe what I'm asking is this: is there such a phenomenen and a way to use it to sort of "cheat" on the speed of advancement and development in relation to the rest of the universe? A chance to "get ahead"? [link] [comments]  |
| How did Einstein extrapolate black holes from General Relativity? Posted: 07 Nov 2016 07:54 PM PST |
| Does hardware get slower / worse over time? Posted: 07 Nov 2016 05:44 PM PST Example my phone seems to be slower now than when I got it (even after a factory reset). Also the camera seems to get worse. Is this in my head or does that actually happen? [link] [comments]  |
| Can noise exist/be detectable at a microscopic scale? Posted: 08 Nov 2016 06:19 AM PST I study malaria and i was just thinking about whether they would make a noise? I was never very good at physics so am not actually sure if detectable noise can exist at that scale? [link] [comments]  |
| Does a complex number have a polar form if the real part is 0? Posted: 08 Nov 2016 04:03 AM PST If you calculate tan-1 you would have to divide by zero.. [link] [comments]  |
| Why don't we use the Moon for gravity assists when sending probes into the rest of the solar system? Posted: 07 Nov 2016 04:25 PM PST I know the STEREO observatories used a lunar gravity assist, but I can't find any other examples of missions that use the Moon. Is it because its lumpy gravity provides too much uncertainty for a deep space mission? [link] [comments]  |
| Will eating 100ml of ice cubes hydrate you the same way as drinking 100ml of water? Posted: 07 Nov 2016 04:48 PM PST As the title says. If I would use 100ml water to make ice cubes and eat them, would this hydrate me the same way as straight up drinking 100ml of water? Or will drinking be more efficient/contain more water than eating ice cubes that are made of the same of water? [link] [comments]  |
| Posted: 07 Nov 2016 03:36 PM PST |
| State space feedback controller design with a reference input? Posted: 07 Nov 2016 06:44 PM PST In classical controls, to control a plant with a reference input the simple structure looks like this. Where the controller multiplies the error. I'm having trouble understanding why in state space feedback systems the gain matrix seems to always multiply the state variables rather than the error term. Like this. Wouldn't it make more sense to put K after the sum? Any insight? Thanks! [link] [comments]  |
| What would stop someone from 3D printing me a bomb and blowing me up? Posted: 08 Nov 2016 06:29 AM PST If I had a 3D printer and someone wanted to kill me could they not just get a bomb printed out at my house and kill me? I'm just a little worried, that's all. Any answers would be appreciated. [link] [comments]  |
| Posted: 07 Nov 2016 03:45 PM PST With fertile soil and water too of course, but without needing to produce an artificial atmosphere for them to grow in? [link] [comments]  |
| Why are BEC's not possible in a photon gas? Posted: 07 Nov 2016 07:47 PM PST Does it have to do with the fact that the number of photons is not conserved? [link] [comments]  |
| How is diesel particulate filter (DFP) regeneration clean for the environment? Posted: 07 Nov 2016 09:56 PM PST I have been wondering about the regeneration of DPF when driving our diesel cars. So DPFs are supposed to prevent pollutant particles from going into our air, so it does it by trapping it in the filter. However, cars have this mechanism where the filter is regenerated as we drive, so we burn off the "soot" so that the filter doesn't clog up. If the soot is burned off, and goes into the atmosphere, doesn't this mean that the filter is not doing anything? I understand that there are NOx and other things being filtered out, but this is regarding particulate matter... [link] [comments]  |
| Posted: 08 Nov 2016 01:35 AM PST I managed to watch a video discussing this idea, and it's confusing me like hell. How does this work? [link] [comments]  |
| Is Bohm's Interpretation of quantum mechanics still relevant in today's physics? Posted: 07 Nov 2016 04:10 PM PST I was reading a bit on it, and I thought it was interesting as a deterministic interpretation of quantum mechanics. Is it still a field of study today, or is it not relevant? [link] [comments]  |
| How come ice cubes don't always float 9% above water? Posted: 07 Nov 2016 07:04 PM PST I understand the basic differences in the density between ice and water, and that's why ice floats 9% above water like icebergs, however my classmate has a bottle of water with ice cubes in it right now, and some ice cubes clearly aren't above the water 9%. What's the explanation to this? [link] [comments]  |
| How does epinephrine (adrenaline) cause skeletal muscle twitching? Posted: 07 Nov 2016 06:04 PM PST It's a known side effect of adrenaline and acts via B2 receptors (or so I've been told) but how does this transmitter affect the somatic system? How does the sympathetic system interact with skeletal muscle? Are there Beta-2 receptors in skeletal muscle? This has been bugging me... [link] [comments]  |
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