"The speed of light is constant for every observer." But how can this be true? [pic] |
- "The speed of light is constant for every observer." But how can this be true? [pic]
- Angler fish lure their prey using light emitting bacteria, but why would the prey which spends its entire life in total darkness of the ocean depths be even lured to such an obvious trap? Do only "lost" living organisms from the upper layers get tricked like that?
- Now that we are several years removed how does the environmental impact of Deep Horizon compare to Fukushima? Is one worse than the other?
- What's the difference between an ionised hydrogen atom and a proton?
- Why do some ph meters go from -2 to 16? I thought ph only went from 1-14?
- f(x) = e^x, f(x) = sin(x) and f(x) = 0 are functions which arrive at itself again when derived (multiple times). Are there more such functions? Is this a relevant class of functions?
- Why does sound always propagate at the same speed though a given medium?
- Why is high voltage better for power transmission than high current?
- How do photons mediate electromagnetism?
- What principles of physics are at work in shaking a ketchup bottle?
- Is there any relationship between vitamin D deficiency or getting adequate levels of sunlight and ADD/ADHD, Depression, or other neurological disorders?
- How are individual photons counted in double slit experiment?
- Why is CPT symmetry so important in upholding QFT?
- How long does a Schwann cell live for?
- Is it possible to to change the wavelength of an EM wave by subtracting energy from it?
- What would a Bubble do in zero gravity/space ?
- How do EMP bombs work ?
- Is silver a colour? Or is it really just the true reflections of things and we only see it as the colour silver for some reason.
| "The speed of light is constant for every observer." But how can this be true? [pic] Posted: 30 Jun 2018 02:58 AM PDT |
| Posted: 29 Jun 2018 11:42 AM PDT |
| Posted: 30 Jun 2018 05:32 AM PDT |
| What's the difference between an ionised hydrogen atom and a proton? Posted: 29 Jun 2018 04:37 PM PDT This is probably a super dumb question, but I was watching the latest scishow space video and they mentioned ionised hydrogen atoms, and that it meant it had lost its only electron. Wouldn't that mean it was just a singular proton? [link] [comments]  |
| Why do some ph meters go from -2 to 16? I thought ph only went from 1-14? Posted: 29 Jun 2018 08:48 AM PDT Looking for ph meters online, some claim to measure from -2 to 16, which I didn't think was even possible. Are they just wild claims or does ph really go beyond 1 - 14 [link] [comments]  |
| Posted: 29 Jun 2018 01:35 PM PDT |
| Why does sound always propagate at the same speed though a given medium? Posted: 30 Jun 2018 07:06 AM PDT As in why can't we have a slow vibration and a fast one (as in wave speed not frequency) [link] [comments]  |
| Why is high voltage better for power transmission than high current? Posted: 29 Jun 2018 04:58 PM PDT I've done some research and the following is what I understand of the topic. Please correct me if I'm wrong. When power is transmitted, electricity is sent to a transformer, which increases the voltage and decreases the current according to the relationship S = IV. The reason for doing this is to minimize power losses along the transmission line, which is equal to RI2 . However, isn't power loss also equal to V2 /R, so having a large voltage would also cause a large power drop? Clearly there is a fault in my logic here because the power calculated with current and the power calculated with voltage would not be equal, so I am looking for an explanation of this. Thanks! [link] [comments]  |
| How do photons mediate electromagnetism? Posted: 29 Jun 2018 10:15 PM PDT Photons are said to be the mediater particle for the electromagnetic force. What is the process behind that? [link] [comments]  |
| What principles of physics are at work in shaking a ketchup bottle? Posted: 29 Jun 2018 05:41 PM PDT I've noticed when I flip a ketchup bottle upside down and shake it with decisive force in one motion when the bottle is closed, all the ketchup rushes towards the cap. When I open the bottle, it comes out with a little bit more force than normal. Is this due to maybe a sort of semi-pressurized vacuum or something? Would it work the same with the cap off? Is this how physicists get their ketchup? Are there other factors or methods worth considering? [link] [comments]  |
| Posted: 29 Jun 2018 01:45 PM PDT |
| How are individual photons counted in double slit experiment? Posted: 29 Jun 2018 05:28 PM PDT Are sensors sensitive enough to detect individual 'impacts' of photons or just like they can only estimate a certain photon 'flow' rate that the sensor is reading on the target? I feel like that would be a way to get more confused about quantum physics if it's the first case, because the second is kind of easier to reason out if it's wave interference pattern. Also, how about like electrons too, aren't we just reading like some sort of denser compressed field in the peak of a wave? Sorry, I don't know much but I'm really trying to learn more bout this. [link] [comments]  |
| Why is CPT symmetry so important in upholding QFT? Posted: 29 Jun 2018 11:38 AM PDT People talk as if violating CPT would break modern quantum physics and require a rebuilding of it. Why is this? [link] [comments]  |
| How long does a Schwann cell live for? Posted: 29 Jun 2018 09:00 AM PDT Hey Reddit, I have a question about Schwann cells. So my understanding is that these cells will wrap the axon in a myelin sheath and in doing so trap themselves within the outer layers. My questions is since the Schwann cells are pushed to the outside of the myelin sheath, does the cell die or stay alive? And if it stays alive, what is the purpose of keeping it alive when it cannot do anything? Thanks, CuriousTehan. [link] [comments]  |
| Is it possible to to change the wavelength of an EM wave by subtracting energy from it? Posted: 29 Jun 2018 04:12 PM PDT Or by adding energy. And if yes then how is it usually done in labs? [link] [comments]  |
| What would a Bubble do in zero gravity/space ? Posted: 29 Jun 2018 10:15 AM PDT |
| Posted: 29 Jun 2018 07:02 AM PDT Hello, I'm wondering how EMP bombs work and how they can disable electronics system. Do they propagate high voltage electricity to fry the systems or is it something else ? [link] [comments]  |
| Posted: 29 Jun 2018 05:21 PM PDT |
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