When undersea mammals are born, is it a rave for them to surface to breathe? |
- When undersea mammals are born, is it a rave for them to surface to breathe?
- Do any animals spit? And if there are none, why?
- Is there a limit for how many frames-per-second we can capture or display with cameras or screens?
- How do satellites fall out of orbit?
- When physicists say light has a wave length of, say 400 nm, what do they actually mean?
- Do rainbows make complete circles but we just don’t see them? Or is it just part of a circle?
- Faith Rodgers recently accused R. Kelly of knowingly infecting her with herpes. Is there a way to prove *he* infected her, based on blood (or other) tests?
- why don't companies like intel or amd just make their CPUs bigger with more nodes?
- In an open-channel flow, if the flow is supercritical and it meets a contraction in the channel, why does the water depth increases?
- Aren't all elements radioactive nuclides to some extent?
- In an open primary election, is it better to vote for my preferred candidate from Party A or the 'least evil' from opposition Party B?
- How can smart scales using bioelectrical impedance differentiate water from muscle/fat?
- Can someone describe - at the physical level - how sound waves propagate through air?
- Why does paper turn yellow after some time?
- What do you call the point where a particle breaks apart?
- Can you have a c-shaped copper coil with a magnet on a arm travel through the gap in the circle and still generate electricity?
- Why are negative integer factorials like (-3)! undefined while rational numbers like (-3,5)! are?
- Can someone derive the intermediate axis theorem?
- Have all bosons in a Bose Einstein condensate the same phase?
| When undersea mammals are born, is it a rave for them to surface to breathe? Posted: 07 Jun 2018 11:52 PM PDT I'm in the shower and wondering if dolphins and whales are born deep enough under water they will suffocate from lack of oxygen. EDIT: Race, not rave. Don't think things get that crazy for fish. Mobile won't let me update the title. Sorry. [link] [comments]  |
| Do any animals spit? And if there are none, why? Posted: 08 Jun 2018 07:18 AM PDT EDIT: It would seem I forgot that llamas existed so I have another question. WHY do some animals spit and others don't? [link] [comments]  |
| Is there a limit for how many frames-per-second we can capture or display with cameras or screens? Posted: 07 Jun 2018 09:29 PM PDT |
| How do satellites fall out of orbit? Posted: 08 Jun 2018 05:51 AM PDT I've heard of satellites that fall to Earth, and I've wondered how that happens. [link] [comments]  |
| When physicists say light has a wave length of, say 400 nm, what do they actually mean? Posted: 07 Jun 2018 10:01 PM PDT Like what is actually fluctuating across those 400 nm? Is the photon moving up and down through space (ie it's moving in a wavy manner)? Is it causing space to expand/contract (like a sound wave pushes air molecules together/apart)? Is it some attribute of the photon that changes over that distance (brightness or energy levels or something)? This is just one of those bits of physics that seems pretty crucial but that I just can't find a good explanation for. [link] [comments]  |
| Do rainbows make complete circles but we just don’t see them? Or is it just part of a circle? Posted: 07 Jun 2018 05:06 PM PDT |
| Posted: 07 Jun 2018 09:07 PM PDT Assuming you could test both parties, and both were infected; would it be possible to compare the virus from party a to the virus from party b and say one infected the other? Could you show direction of transmission (using number of mutations, maybe)? [link] [comments]  |
| why don't companies like intel or amd just make their CPUs bigger with more nodes? Posted: 08 Jun 2018 07:30 AM PDT |
| Posted: 08 Jun 2018 05:17 AM PDT I mean, shouldn't it decrease as the width of the channel is narrower and therefore the flow will accelerates, increasing its speed, to keep the flow continuous? Does this mean that flow has gained energy? [link] [comments]  |
| Aren't all elements radioactive nuclides to some extent? Posted: 07 Jun 2018 06:35 PM PDT |
| Posted: 07 Jun 2018 06:00 PM PDT |
| How can smart scales using bioelectrical impedance differentiate water from muscle/fat? Posted: 08 Jun 2018 02:51 AM PDT |
| Can someone describe - at the physical level - how sound waves propagate through air? Posted: 08 Jun 2018 02:49 AM PDT My knowledge of physics stopped at secondary school (= high school for US readers) 30 years ago. I've always been interested in music and I'm currently reading a book about acoustics. While reading that book it occurred to me that although I take the propagation of sound through air as given I struggle with forming a mental model about how this works at a molecular level. So far what I have is something like ... The molecules in the speaker cone move forward. These molecules push against the molecules in the air immediately in front of the speaker cone moving them forward. As these air molecules move forward they push against the air molecules in front of them. So I get how a compression wave might be generated. But then the molecules in the speaker cone move backwards. So ... how do the molecules in front of the speaker know to move backward? I get that it's an area of low pressure but that just means "fewer molecules" right? So do the molecules in front of the speaker - have they just rebounded off other air molecules or ... you can see I'm getting in a muddle. Is any of this to do with anything bumping into anything or is this all just nonsense? [link] [comments]  |
| Why does paper turn yellow after some time? Posted: 08 Jun 2018 02:32 AM PDT Today I came back from a trip and I noticed that a sheet of paper that I left on my PC last week has a yellow, moisty stain. I doubt that it's just dirty, especialy since we all heard a saying about yellow paper, so I wonder if it's a chemical reaction of cellulose and oxygen. Also, does ink have any effect on it? Why is it, that when we buy new printer paper it's fresh white and stays that way for a long time? [link] [comments]  |
| What do you call the point where a particle breaks apart? Posted: 07 Jun 2018 04:46 PM PDT I'm a senior high school student, so a more simplistic explanation if possible would be much appreciated! My chem professor has informed me that compounds can have triple points as long as they do not exceed 'the point where a particle falls apart'. When asked what it falls apart into, I was told 'some kind of gaseous plasma.' I'd assume there would have to be a ridiculously high amount of pressure and an impossibly hot temperature for this to happen. What does this actually mean? Is somebody able to explain this using an example of a simple compound? Thank you very much! [link] [comments]  |
| Posted: 07 Jun 2018 02:41 PM PDT Newb here. Trying to understand if electricity can be produced if the copper coil isn't a closed circle. Any examples would be welcome :) Thanks in advance! [link] [comments]  |
| Why are negative integer factorials like (-3)! undefined while rational numbers like (-3,5)! are? Posted: 07 Jun 2018 09:30 AM PDT |
| Can someone derive the intermediate axis theorem? Posted: 07 Jun 2018 03:17 PM PDT Hello everyone, I am a future senior in high school and I just finished AP Physics 1. I came across an interesting phenomenon called the intermediate axis theorem. I understand what the intermediate axis theorem is and how it works. However, to me at the moment I see it as a rule without any understanding of it. I do not understand why the intermediate axis does not have the same restoring force that the other two axes have. If someone could maybe derive the theorem and explain it along the way that would be great. I have found this post: https://www.reddit.com/r/askscience/comments/3lf6x8/why_cant_you_spin_a_phone_around_each_axis/cv5scxb/?st=ithibtpr&sh=d1ec8e9f already and the problem is that I am not completely familiar with all of the terms and language they use. Please keep in mind that even though I love physics I am still only in ap physics 1 when you are answering this question. [link] [comments]  |
| Have all bosons in a Bose Einstein condensate the same phase? Posted: 07 Jun 2018 11:22 AM PDT The bosons in a Bose Einstein condensate form a "macroscopic coherent wavefunction". But can the bosons interfere with each other? Or is this question senseless in some sense? [link] [comments]  |
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