When my earphones are plugged into my laptop (and nothing is playing) I hear a hum. If I touch any metal surface on the laptop, the hum stops. What is causing both effects? |
- When my earphones are plugged into my laptop (and nothing is playing) I hear a hum. If I touch any metal surface on the laptop, the hum stops. What is causing both effects?
- I feel like my night vision was better as a child, is this possible?
- Ask Anything Wednesday - Physics, Astronomy, Earth and Planetary Science
- Why is marine animal meat flakey?
- Are some of Pluto's moons really ellipse shaped?
- Why do people's voices get shakier as they get older, and why do they seem to speak slower?
- How and Why does the regularization of divergent series work when it comes to Casimir Effect/Physics?
- Why is an electron microscope more detailed than than a (light) microscope?
- Can a moon have a moon? Can that moon have a moon?
- If you generated a large random sample of numbers, and then converted those numbers to binary, would there be roughly equal amounts of ones and zeros?
- Does Guaifenesin affect all mucous secretion?
- How much of time dilation is due to the gravity well versus relative velocity?
- What shape is the universe?
- Why do we feel more details when we touch something with the tips of our finger, than the rest of our body?
- How do trees and small plants 'fight' disease?
- Does the second law of thermodynamics factor into your headphones being tangled and why?
- How does the brain simulate complex situations and conversations? Which part of the brain simulates life?
- can someone explain what is entropy in detail?
- Would it be possible to make a radio tower that broadcasted to the entire united states? If so what would be the implications?
- How does Jupiter bombard Europa with radiation? Where does theta radiation come from?
- Children seem to have a much higher tolerance/appreciation for repetition than adults do. Why is that?
- Watching a special weather report and they're showing total lightning strikes and then also showing the percentages that are positive and that are negative. What is the difference and why do they track it?
- If the earth compressed to a peanut and turned into a black hole, would it have the volume or a peanut? Or would it be a single point of singularity and the event horizon would be the size of a peanut?
- What exactly is energy? (Multiple questions inside)
| Posted: 17 Nov 2015 06:38 AM PST |
| I feel like my night vision was better as a child, is this possible? Posted: 18 Nov 2015 06:47 AM PST Hi all, so I was standing around outside last evening and I got the distinct impression that I used to be able to see better in the dark, but I don't really know if that's true (difficult to directly compare) or if I'm just misremembering how it used to be. My visual acuity has not deteriorated and my current night vision is still adequate to see things in the dark, I just feel like I used to be even better at it. Are there any studies in night vision that would indicate that it can deteriorate or if children might have superior night vision to adults? [link] [2 comments]  |
| Ask Anything Wednesday - Physics, Astronomy, Earth and Planetary Science Posted: 18 Nov 2015 07:02 AM PST Welcome to our weekly feature, Ask Anything Wednesday - this week we are focusing on Physics, Astronomy, Earth and Planetary Science Do you have a question within these topics you weren't sure was worth submitting? Is something a bit too speculative for a typical /r/AskScience post? No question is too big or small for AAW. In this thread you can ask any science-related question! Things like: "What would happen if...", "How will the future...", "If all the rules for 'X' were different...", "Why does my...". Asking Questions: Please post your question as a top-level response to this, and our team of panellists will be here to answer and discuss your questions. The other topic areas will appear in future Ask Anything Wednesdays, so if you have other questions not covered by this weeks theme please either hold on to it until those topics come around, or go and post over in our sister subreddit /r/AskScienceDiscussion , where every day is Ask Anything Wednesday! Off-theme questions in this post will be removed to try and keep the thread a manageable size for both our readers and panellists. Answering Questions: Please only answer a posted question if you are an expert in the field. The full guidelines for posting responses in AskScience can be found here. In short, this is a moderated subreddit, and responses which do not meet our quality guidelines will be removed. Remember, peer reviewed sources are always appreciated, and anecdotes are absolutely not appropriate. In general if your answer begins with 'I think', or 'I've heard', then it's not suitable for /r/AskScience. If you would like to become a member of the AskScience panel, please refer to the information provided here. Past AskAnythingWednesday posts can be found here. Ask away! [link] [3 comments]  |
| Why is marine animal meat flakey? Posted: 17 Nov 2015 06:53 AM PST The meat from marine animals (excluding mollusks) has a distinct texture. It is much more rubbery and flakey than meat from land animals. Why is this? [link] [36 comments]  |
| Are some of Pluto's moons really ellipse shaped? Posted: 18 Nov 2015 05:31 AM PST https://www.reddit.com/r/space/comments/3t8iy8/plutos_spinning_moons/ in that post some of the moons are ellipses... how is that possible? shouldn't gravity pull them into circles (or close to circles atleast)? [link] [2 comments]  |
| Why do people's voices get shakier as they get older, and why do they seem to speak slower? Posted: 17 Nov 2015 08:14 AM PST Is speaking slower a generational thing or is there a biological reason for it? [link] [55 comments]  |
| Posted: 17 Nov 2015 09:56 PM PST Hey. Background on what I know when it comes to this topic: I'm a math boy (if you up during real mathematician hours, smash that like) and at first, series/summation inspired me to learn more math, but lately I just want to learn/comprehend more math so I can apply it to summation (LOL) and in the past I've played with alternating geometric series and used that to assign those special values (Regularizing negative integer values of Dirichlet's Eta function), but just recently i figured out why and how Ramanujan summation works and i was able to directly regularize the divergent series associated with negative integer values of the Zeta function. I am just a clueless bum when it comes to physics, my first course ever was this semester (It was newtonian stuff; no calculus) and I had to drop it because I had a hard time getting a grip on the material. Can someone explain to me how and why does the regularization of divergent series work when it comes to Casimir Effect/Physics? I'm confident with what I know when it comes to the math behind this. I've read an introductory paper about this effect, but it was mainly mathematical and just barely any physics (There was a reference to a vaccum inside a prism and something about the total energy not being equal to zero, but that was like the second page and there was barely any physics after that). [link] [2 comments]  |
| Why is an electron microscope more detailed than than a (light) microscope? Posted: 17 Nov 2015 08:12 AM PST When I see images from electron microscopes it seems we are able to look at smaller objects than light microscopes. Why? [link] [70 comments]  |
| Can a moon have a moon? Can that moon have a moon? Posted: 18 Nov 2015 02:43 AM PST Can a moon have a moon? Can that moon have a moon? How far can this pattern continue before there's an inherent instability in the system? Please note, it does not need to be forever stable. It does need to be stable for an appreciable period of time to count. [link] [4 comments]  |
| Posted: 17 Nov 2015 08:42 PM PST If not, why not? Also, would it make a difference whether the numbers you randomly generated were small or large numbers? That is, if you set limits on the generated numbers, would a sample including 1-999,999 be substantially different than 1-99 after both sets were converted to binary? [link] [9 comments]  |
| Does Guaifenesin affect all mucous secretion? Posted: 17 Nov 2015 08:37 AM PST |
| How much of time dilation is due to the gravity well versus relative velocity? Posted: 17 Nov 2015 07:53 AM PST So I got into discussing relativity with some friends and I have this question: A GPS satellite, as far as I understand, needs to take into account a small adjustment for relativity, i.e. Time dilation, in order to make an accurate position reading. So what portion of that is due to being further out of the Earth's gravity well, and how much much is due to the higher tangential velocity from being farther out in an orbit? Can you even separate the two components? Edit: Removed "geosynchronous" [link] [15 comments]  |
| Posted: 17 Nov 2015 01:35 PM PST |
| Posted: 17 Nov 2015 08:01 AM PST Why do we feel more details when we touch something with the tips of our finger, than the rest of our body? Is this because we have different kind of nerves (sensors) on the tips of our fingers than the rest of our body? Or is it our brain thats somehow causing this to happen? [link] [12 comments]  |
| How do trees and small plants 'fight' disease? Posted: 17 Nov 2015 05:31 AM PST Additionally, how are trees able to change their cells near damaged areas to slow or prevent localized decay and/or disease? [link] [10 comments]  |
| Does the second law of thermodynamics factor into your headphones being tangled and why? Posted: 18 Nov 2015 03:27 AM PST Hi, now I'm sure this has been asked before however I was chatting with my college tutor, and he was explaining to me that it is the second law of thermodynamics which causes headphones to get tangled in your pocket. He stated that entropy causes this however I'm not very savvy with all of this lingo, I'm a computer fixer and he is physics lover. Really smart guy didn't get along with him at first but we found mutual ground and got along after a while. I love physics however I am not very good with that kind of thing despite my love of it. Anyway could someone please explain in terms what causes your headphones to tangle and if it is in fact down to the second law of thermodynamics dynamics? I understand mostly that it's from moving but does thermodynamics function into this to cause them to tangle or is it literally just the fact they decide to fight in your pocket... Thanks Reddit Posted from my phone so sorry for no formatting. [link] [1 comment]  |
| Posted: 17 Nov 2015 11:33 AM PST |
| can someone explain what is entropy in detail? Posted: 17 Nov 2015 08:32 AM PST "entropy is disorder" so then why do we need to measure that disorder? and why this disorder is measured in joule/kelvin ? "entropy is constantly increasing" but how? what exactly is entropy? [link] [17 comments]  |
| Posted: 17 Nov 2015 02:04 PM PST |
| How does Jupiter bombard Europa with radiation? Where does theta radiation come from? Posted: 17 Nov 2015 09:18 AM PST |
| Posted: 17 Nov 2015 01:51 PM PST Children will watch the same movie 1000 times, repeat the same funny word or joke over and over, play videogames with repetitive music and generally seem to enjoy repetitive things that are highly annoying to adults. Why does this shift change? Is this universal? [link] [2 comments]  |
| Posted: 17 Nov 2015 09:52 AM PST Not sure if this clarifies anything or not, but while they had an actual number for the total number of strikes, the positive and negative strikes were in percentages. [link] [7 comments]  |
| Posted: 17 Nov 2015 02:03 PM PST |
| What exactly is energy? (Multiple questions inside) Posted: 17 Nov 2015 11:27 PM PST I watched a video about What Is Radiation. It says that atoms release energy. But what is energy? Is energy a like physical object? The video say that when radioactive decay occurs, atoms release particles. What are these particles? Are they protons, neutrons, or electrons? Also, isn't energy about motion? Like object A hits object B. This causes Object B to move. How is this energy compared to how atoms release energy from radioactive decay? Is there a difference? When Object A hits Object B, do the particles from the atoms move or exchange place? [link] [5 comments]  |
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