- If you were to fall into a black hole, just as anyone watching would see your time slow down until you stop forever on the event horizon, would you in turn see the entire future of the universe pan out in front of you? If not, why does the mathematics not allow this reversal of perspective?
- What actually is particle entanglement in simple terms?
- What happens in the brain when semantic satiation occurs?
- Is there a species of Army Ant particularly known for NOT dividing soldiers and workers? Any ant species overall? Anti-Polymorphic?
- Can black holes move?
- [Astronomy] How do "hot Jupiters" retain an atmosphere?
- What were the environmental consequences of connecting the Red Sea and the Mediterranean Sea via the Suez Canal?
- Why doesn't an induced EMF produce a never ending cycle of change in magnetic flux?
- Do solar flares affect the human brain?
- How do we know the depth of the ocean?
- In a plant seed, has the metabolism completely stopped until germination or is there still very very very slow "life" happening? In other words, is it "paused", or is it consuming energy very slowly?
- how do your nerves know the difference between sensations on the surface of your skin (i.e. itch vs. tickle vs. stinging sensations)?
- How narrow and what range could a magnetic field be projected to act on a far away object?
- Since EMF at RF & IR are lower-energy than visible light, why do they propagate so much better?
- Do we know the long-term health effects of plant-based meat substitutes yet, like Beyond Meat or Impossible Burger? This trend caught on rather quickly and it makes me worry.
- Do meteorites reach terminal velocity before hitting the surface of the Earth?
- Why do localized sensory organs tend to be located near the brain in so many different animals?
- Can any event generate gravitational waves?
- Could you tell if someone had a good memory based on a scan of their brain?
- Physics of a photograph?
- Pores in metal: myth or reality?
- Does the moon have a fine line where the light side and the dark side meet? Or does it gradually get darker?
| Posted: 20 Sep 2019 03:29 AM PDT I'm not the most knowledgeable on theoretical physics, I'm only armed with a keen interest. I'm aware that if you were to approach a black hole, your speed relative to someone watching from afar would increase greatly, thus your time from their perspective would appear to slow down until you reach the event horizon, where you would freeze in place for eternity. In this sense, as your personal time is moving so much slower than all of that around you, would you not see the future of the universe unravel before you, just as you cross the event horizon? [link] [comments]  |
| What actually is particle entanglement in simple terms? Posted: 19 Sep 2019 04:14 PM PDT Have a quite limited knowledge of physics but I've always wondered what the nature of engagement is, how are two particles entangled and why does interacting with one effect the other? [link] [comments]  |
| What happens in the brain when semantic satiation occurs? Posted: 20 Sep 2019 07:03 AM PDT |
| Posted: 20 Sep 2019 06:15 AM PDT |
| Posted: 20 Sep 2019 06:13 AM PDT This may be a silly question, but bare with me. Could in theory a black hole have momentum like say a comet. Traveling different galaxies and sucking up things that get close to it? If so, what would happen if it passed through or collided with something like our sun? [link] [comments]  |
| [Astronomy] How do "hot Jupiters" retain an atmosphere? Posted: 20 Sep 2019 05:39 AM PDT I was reading the short article below that mentioned these exoplanets are often so close to their host star that they can complete an orbit in three days. With that proximity how do they retain atmosphere? Do the host stars lack a solar wind? Do they possess strong magnetic fields? Something else? Sorry for the article link being an inelegant cut-and-paste. Mobile is not kind to me (sorry, Alabama...can't resist a half assed pun). [link] [comments]  |
| Posted: 19 Sep 2019 03:17 PM PDT |
| Why doesn't an induced EMF produce a never ending cycle of change in magnetic flux? Posted: 20 Sep 2019 05:05 AM PDT So in my highschool physics classes, we learnt that induced EMF is caused due to a change in magnetic flux. So if there are two coils ( primary and secondary) when the current in primary is increased, magnetic field changes and hence flux changes. Consequently an induced EMF is set up in secondary coil. My query is over here, won't this induced EMF in second coil generate its own current and magnetic field which causes a change in flux of primary coil which in turn generates current in primary coil and won't this cycle continue indefinitely? Sorry for grammatical errors. Thanks in advance [link] [comments]  |
| Do solar flares affect the human brain? Posted: 19 Sep 2019 07:15 PM PDT Recently I've been reading about solar flares, how they impact the Earths magnetosphere, etc, and I've been wondering if they affect the human brain, as our brains are made up of neurons pulsing electricity between themselves. Is there ANY correlation between solar activity and the human brain? [link] [comments]  |
| How do we know the depth of the ocean? Posted: 19 Sep 2019 09:15 PM PDT |
| Posted: 20 Sep 2019 04:08 AM PDT |
| Posted: 19 Sep 2019 04:09 PM PDT I've always wondered how I know to scratch an itch or why I don't scratch at something like a hair that kind of tickles me. [link] [comments]  |
| How narrow and what range could a magnetic field be projected to act on a far away object? Posted: 19 Sep 2019 08:34 PM PDT Is there a limit to how 'directed' a magnetic field is? If you can create a narrow in scope magnetic field to act on a remote object, what would be the limit of how distant this object could be? I realize the words I'm using are probably not precise, but I was curious about the idea. [link] [comments]  |
| Since EMF at RF & IR are lower-energy than visible light, why do they propagate so much better? Posted: 19 Sep 2019 08:06 PM PDT I have a remote with tiny IR LED that consumes much less than a watt, yet it's able to trigger a receptor on the other side of the building, through two closed doors. The light shines out windows, bounces off neighboring walls, traveling a good 60 meters--a light that's barely visible to the eye from 1 meter in daylight. What is it about IR that allows so much better propagation than visible EM? [link] [comments]  |
| Posted: 19 Sep 2019 09:46 PM PDT Not that eating and smoking are the same thing, but we are only just now discovering the long-term effects that vaping can have on the lungs. We know these plant-based meat substitutes are edible and don't cause immediate issues, but so we know they're safe if you're eating them over a period of time. These kinds of developments in food are exciting, but I worry we're all going to wake up to learn of some nasty side effects or something like that someday. This trend just happened so quickly and it wouldn't surprise me if this were just another example of people putting money ahead of safety or the common good. [link] [comments]  |
| Do meteorites reach terminal velocity before hitting the surface of the Earth? Posted: 19 Sep 2019 09:40 PM PDT I know meteors travel through space 10k-100k mph. I know they slow down as they enter the Earth's atmosphere, but they're still going super fast. Are they going fast enough that they "overcome" terminal velocity? In other words: if the same meteorite were instead dropped from the upper atmosphere, would it have the same impact on the ground? Thanks! [link] [comments]  |
| Why do localized sensory organs tend to be located near the brain in so many different animals? Posted: 19 Sep 2019 05:05 PM PDT I've noticed that nearly all animals I can think of (specifically vertebrates, arthropods, molluscs, roundworms, and flatworms) have their localized sensory organs on or near the body region that contains their central nervous cluster/brain. The only possible examples I can think of that run counter to this are sponges, which have no nerve cells AFAIK, and jellyfish/hydras, which only have decentralized nervous systems. So my question is, do we see this pattern just because of divergent evolution (i.e., those animals' most recent common ancestor had eyespots near its nervous center and we're all descended from the same genetic template), or if it has something to do with nerve signals taking longer over greater distances leading to an evolutionary advantage for creatures whose sensory organs are near the brain, or if it's something else entirely. Also it is possible that I'm exhibiting bias by weighting arthropods and vertebrates more heavily and this is not even a real pattern. I don't know much, but I sure would like to. [link] [comments]  |
| Can any event generate gravitational waves? Posted: 19 Sep 2019 11:56 PM PDT If any event(black holes merging, neutron stars merging, jumping on trampoline) disturbs the space time fabric do they generate gravitational waves ? [link] [comments]  |
| Could you tell if someone had a good memory based on a scan of their brain? Posted: 19 Sep 2019 04:44 PM PDT |
| Posted: 19 Sep 2019 05:50 PM PDT Now maybe I'm thinking waaaay outside my noodle on this but hear me out then please explain what the true nature of the photograph is. For my example let's say you take a photo with a Polaroid, it prints out a photo. you took a photo of a tree on a hill of green grass with clear blue sky, as basic as it can be. When you take the photo, you are aligning photons forever on a sheet of atoms. Is there any form of quantum entanglement happening between the tree and the photo. To branch even further on my weak limb, from a philosophy standpoint, if after the photo is taken the tree is atomicly obliterated. Is the entanglement (if there was) still present? I feel like my idea of entanglement might be off, but I'm just a no college mechanic/tinkerer Thanks in advance [link] [comments]  |
| Pores in metal: myth or reality? Posted: 19 Sep 2019 09:31 PM PDT I have heard in a few different contexts that ferrous metals have "pores", and that penetration into said pores is necessary for the proper function of things like lubricants and seasoning in cast-iron cookware. However, the actual existence of such pores seems implausible to me based on micro-photography and electron microscope images that I've seen, as well as the fact that metal tanks can hold hydrogen and other gases with small molecules. A pair of hydrogens has obviously got to be smaller than a complex molecule with multiple hydrogens and a bunch of other atoms. Anyway, I'm turning to Ask Science in the hopes that someone with actual metallurgical knowledge can provide me with not just a definitive answer, but a source that I can cite. Thanks! [link] [comments]  |
| Posted: 19 Sep 2019 09:03 PM PDT |
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