When we extract energy from tides, what loses energy? Do we slow down the Earth or the Moon? |
- When we extract energy from tides, what loses energy? Do we slow down the Earth or the Moon?
- Dry ice sublimates at around -80°C. Coldest temperature on earth measured ~= -89°C. Does CO2 start to condense?
- Do animals that mate for life (eg. Penguins, beavers, etc.) sleep around a bit before mating for life or do they just spend the rest of their lives with the first one they mate with?
- Why are potato chips usually hyperbolic, but not flat or elliptic?
- How would a theoretical "metallic hydrogen" rocket thruster work?
- How do we know/estimate the colour of dinosaur feathers/scales/skin without any real images of them?
- Does sign language differ significantly from country to country?
- Is there an audio equivalent of Framerate? And can our ears notice it?
- Are there any animal species living on the seabed that are unable to swim?
- How do we actually know if quantum particles can teleport?
- How do we know that the conservation of energy is an actual thing?
- What causes particles to behave in paired ways in quantum entanglement?
- Why do hurricanes weaken over land, while incredibly strong and violent tornadoes can form and sustain themselves entirely over land?
- Why does any system/particles/electrons/atoms tend to be on the position with the lowest energy state?
- Is it possible to run an entire home off grid using DC power and renewable energy?
- What is just the relativistic effect on the orbit of S0-2 around Sagittarius A*? By how much would it theoretically precess?
- How do people know what the Milky Way looks like?
- Why does neutrinoless double beta decay only result in matter production?
- How do scientists know that a rock is a meteorite?
- Why does the windchill make it feel colder outside even though the real temperature is still the same?
- How physicists proves that quantum superposition is real?
| When we extract energy from tides, what loses energy? Do we slow down the Earth or the Moon? Posted: 04 Mar 2018 04:11 AM PST |
| Posted: 04 Mar 2018 04:58 AM PST Hello :-) I am currently using dry ice with students in the tinker workshop. We where curious... What happens when the atmosphere gets colder? Weird Snow? Frost? Or would it need to be significantly colder? Random quote from currentResults
Thanks, have a nice day! :-) [link] [comments]  |
| Posted: 03 Mar 2018 08:30 AM PST |
| Why are potato chips usually hyperbolic, but not flat or elliptic? Posted: 03 Mar 2018 01:00 PM PST Not sure if that's appropriate flair, but anyways. Usually potato chips are slightly saddle shaped, meaning they curve in opposite directions along the length and width of them (hyperbolic). Why don't they curve more like a sphere, in the same direction both ways (elliptic)? Why curve at all? I know it takes work to change the curvature of something, my understanding is that's why you can fold pizza to stop it from drooping. [link] [comments]  |
| How would a theoretical "metallic hydrogen" rocket thruster work? Posted: 04 Mar 2018 02:50 AM PST Can't seem to find this information on the internet. Only found out that it was "lighter" and "more efficient" than regular hydrogen fuel, but how would it work, in depth, as a proper rocket fuel in an actual rocket engine? Additional Questions: Does this type of thrust require an oxidizer? Is metallic hydrogen still just two hydrogen atoms single-bonded to one another like regular rocket propellant or something different entirely? Does it have different phases than regular hydrogen (i.e. when is it a solid, liquid, etc.)? What are other benefits of metallic hydrogen [link] [comments]  |
| How do we know/estimate the colour of dinosaur feathers/scales/skin without any real images of them? Posted: 03 Mar 2018 05:13 PM PST I've always wondered how scientists/ graphics designers came up with the coulored reconstructions of dinosaurs. I've lived off the theory thus far that it's all guess work based around their natural environment and how they interact with it. Or possibly, that cells of their bone were analysed and subsequent pigment cells could be guesstimated from that. Thanks in advance! [link] [comments]  |
| Does sign language differ significantly from country to country? Posted: 03 Mar 2018 08:18 PM PST |
| Is there an audio equivalent of Framerate? And can our ears notice it? Posted: 04 Mar 2018 04:24 AM PST For example, while viewing a slowed down video, there are less frames per second so things seem jumpy and jittery, but you can record at high frame rates to counteract this. If we were to listen to sound slowed down, would there be gaps that were audible? And could that be negated by high bitrate recording? [link] [comments]  |
| Are there any animal species living on the seabed that are unable to swim? Posted: 04 Mar 2018 04:59 AM PST I mean species that would be too heavy to be able to swim up, so they would be living exclusively at the bottom of the seabed, maybe able to somewhat "jump" etc, but not actually swim freely in all directions. Are there any species like that? And if so, is there any evolutionary purpose to losing the ability to swim as a species that live under water? [link] [comments]  |
| How do we actually know if quantum particles can teleport? Posted: 03 Mar 2018 07:31 PM PST I just learned about Heisenberg's uncertainty principle, and that you can't interact with a quantum particle directly due to needing to introduce energy to get a response. I also recently learned about quantum tunneling, that particles can jump through space. How can we tell that this happens due to the inability of directly viewing these particles? And could the effect of observing something cause this affect? Like could the interaction cause the particle to move in the first place, and due to the lack of being able to accurately track it could that seem like it's "skipping" or jumping through space? Sorry for the formatting, on mobile. [link] [comments]  |
| How do we know that the conservation of energy is an actual thing? Posted: 04 Mar 2018 01:40 AM PST I don't really know a lot about physics, but from the stuff I've come across everyone seems to treat the conservation of energy or information as given, but how do we know that that's a thing? [link] [comments]  |
| What causes particles to behave in paired ways in quantum entanglement? Posted: 04 Mar 2018 02:01 AM PST Curious about the nature of the agency that causes particles to behave similarly. Is there any limit on the distance apart that they can be for this effect to still make itself felt? [link] [comments]  |
| Posted: 03 Mar 2018 04:32 PM PST |
| Posted: 04 Mar 2018 05:31 AM PST I understand that the way electrons "fit" around the nucleus is such that they are in the lowest energy state possible. I'm also told that this is also the reason why atoms and various compounds/molecules are formed but why is this so? Is there any specific reason? Also how does the electron/atom "know" that it's in the lowest energy state and how it has to align itself? [link] [comments]  |
| Is it possible to run an entire home off grid using DC power and renewable energy? Posted: 04 Mar 2018 05:02 AM PST Is it possible to run an entire home off grid using DC power and renewable energy? I mean so power from an array of rooftop solar panels , and perhaps a small DC garden wind turbine A Battery storage sufficient to take and store renewable energy to power the home when there is not enough energy being produced. All appliances are efficient like DC LED light bulbs, televisions, future electric car charging etc. Many items now run of USB power like phones, laptops etc, and with things like TYPE C and other usb advances even more power hungry products can now be used So whats stopping us from skipping AC if your producing sufficient energy, has it been done, can it be done, does everything in the home have a DC equivalent, and how much more efficient will it be, and will be seeing future homes running of DC entirely? [link] [comments]  |
| Posted: 03 Mar 2018 04:22 PM PST I understand that the "daisy petal effect" on Mercury's orbit is 40 - 43 arc seconds more per century than can be accounted for by the laws of motion, that Einstein's GR accounts for perfectly. There was a measurable GR effect on a tiny body coming within 4.7 x 107 km of 1 solar mass, how about on a 15M body coming within 1.8 x 1010 km of a 4.3 x 106 solar masses? Would S0-2 precess more or less than Mercury? (I'm discussing the GR component of precession only. I realize most of Mercury's 570 arc seconds of precession per century is due to effects from the other planets. I have no way of calculating that for S0-2.) Edit: changed "per year" to "per century" and changed the values. "per year" implies one orbit, but then i realized its one earthly orbit and 4.15 mercurian orbits and now I hate it. [link] [comments]  |
| How do people know what the Milky Way looks like? Posted: 04 Mar 2018 04:23 AM PST |
| Why does neutrinoless double beta decay only result in matter production? Posted: 03 Mar 2018 02:12 PM PST I was reading about attempts to detect neutrinoless double beta decay. The basic idea is that if neutrinos are their own antiparticles, then in the rare instance that a double beta decay occurs, the two antineutrinos can annihilate each other leaving only the two e- behind. This is a possible explanation or pathway to why there is matter-antimatter asymmetry in the Universe. But why would this process not equally occur with double beta-plus decay? Is there a physical mechanism meaning it only happens in double beta-minus decay? Or is double beta-minus decay simply hypothesised to be more common (or less rare) than double beta-plus decay? [link] [comments]  |
| How do scientists know that a rock is a meteorite? Posted: 03 Mar 2018 04:22 PM PST I was reading an article that mentioned the first meteorite found from mercury and wanted to know how they figure out that it's not from earth at all but from a different source? [link] [comments]  |
| Posted: 03 Mar 2018 10:57 PM PST Forgive me if this is a simple answer and I'm not realize it, but it has been excessively windier than usual (30-40mph) in the northeast and made me wonder why it feels colder outside when the wind is blowing even though the temperature warmer than it really feels? [link] [comments]  |
| How physicists proves that quantum superposition is real? Posted: 03 Mar 2018 10:33 PM PST |
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