[Physics] Pauli's exclusion principle states that no two fermions can occupy the same state, but how come it only seems to be relevant when the fermions are also really close? |
- [Physics] Pauli's exclusion principle states that no two fermions can occupy the same state, but how come it only seems to be relevant when the fermions are also really close?
- How do our brains deciding which words to use when talking aloud?
- Why dont more people in the US get illnesses from mosquitoes even though the same mosquito may extract blood from several hosts?
- If I am standing on a beach at sea level, how far can I see into the horizon?
- What is the relation between kVp and Dose?
- What is a quiescent active region on the sun?
- How legitimate is the technology showcased in this Vice video that transforms CO2 into a carbon-neutral source of fuel for existing vehicles?
- Why executable programs can't be reverse engineered to reveal their source codes?
- How does getting the flu shot work if your bodys t cells remimber the virus, why get it every year?
- Are big veins and a good blood circulation linked?
- What are the theoretical limits of thermionic vacuum tube technology?
- Why do objects appear smaller the further away they are?
- [Biology] How does a decrease in entropy lead to an increased reaction rate in enzymes?
- Can somebody explain how nitinol engine works?
- When a star goes supernova amd collapses into a black hole, how much of thay star's mass becomes the black hole?
- What are these beams (?) of I don't know what in the sunset?
- Why do endorphins cause respiratory depression?
| Posted: 17 Sep 2018 05:26 AM PDT In the derivations I've seen, Pauli's principle is -in principle - independent of the distance between the particles. And I can't wrap my head around why this doesn't seem to be the case in real life situations [link] [comments]  |
| How do our brains deciding which words to use when talking aloud? Posted: 17 Sep 2018 06:02 AM PDT I don't know about you guys, but when I talk aloud there's not a whole lot of planning going on upstairs. I'm not visualizing any words, yet coherent sentences come flowing out of my mouth. How does this happen? Who is calling the shots up there? This seems completely opposite to how I communicate through text, where I'm visualizing the words on my keyboard and screen as I think and type them out. I feel like this Michael Scott quotes demonstrates this phenomenon best. [link] [comments]  |
| Posted: 16 Sep 2018 05:01 PM PDT If a mosquito extracts blood from a squirrel, and then gets blood from you, and then gets blood from some other person, and so on, wouldnt their be a prevalence of some kind of disease spreading from host to host? [link] [comments]  |
| If I am standing on a beach at sea level, how far can I see into the horizon? Posted: 16 Sep 2018 06:18 PM PDT Assume it's a clear day with perfect visibility and you're looking out to sea? Edit: I'm so bad at phrasing. I was trying to ask how far away could you see the clouds [link] [comments]  |
| What is the relation between kVp and Dose? Posted: 17 Sep 2018 06:13 AM PDT Hello, I have a question in regards to medical x-ray imaging. I have heard mixed things and cannot figure out if using lower kVp will result in a higher or lower dose. I was always under the impression that higher energy x-rays are more harmful, however if the penetration of the beam increase with kVp then wouldn't the radiation absorbed in the patient also decrease? Also, does this mean that very high energy radiation essentially isn't harmful because it a travels through the patient? Any answers to this or kVp vs dose in general are appreciated. [link] [comments]  |
| What is a quiescent active region on the sun? Posted: 16 Sep 2018 07:39 PM PDT I'm researching the coronal heating problem for a class, and I am confused about the term "quiescent active region". It shows up frequently in journal papers talking about nanoflares and Alfven waves. [link] [comments]  |
| Posted: 16 Sep 2018 04:58 PM PDT https://www.youtube.com/watch?v=Mb_8DJF6Hp0 If it sounds too good to be true, it probably is. But nevertheless, what's your opinion? Do you think this technology is legitimate? If it is, how likely / soon would it be implemented across the world to finally bring greenhouse gas emissions under control? This sounds like a huge turning point in the fight against climate change but I'm very skeptical. [link] [comments]  |
| Why executable programs can't be reverse engineered to reveal their source codes? Posted: 16 Sep 2018 10:43 AM PDT It seems to me that compiling a source code and generating an executable is a deterministic process. Therefore, it may be ways to obtain the source reversing the process. Is there some kind of encryption involved? [link] [comments]  |
| How does getting the flu shot work if your bodys t cells remimber the virus, why get it every year? Posted: 16 Sep 2018 08:09 AM PDT So our body will remember a virus that has entered and been defeated . So then why is it we get the flu shot every year ? Do they just give you multiple flu virus strains ? Or is it a single virus strain every year. My guess is that they pick a strain that they think will be going around that year . Any answers are appreciated [link] [comments]  |
| Are big veins and a good blood circulation linked? Posted: 16 Sep 2018 06:47 AM PDT |
| What are the theoretical limits of thermionic vacuum tube technology? Posted: 16 Sep 2018 08:45 AM PDT As we know, thermionic tubes were largely replaced by semiconductors in the mid-20th century, as the latter technology features a number of advantages, including cost, efficiency, reliability and size... Now suppose, for the sake of discussion, semiconductors were never discovered or invented, and we had to try and improve thermionic tube technology instead. Could thermionic tubes have been made significantly more reliable, and possibly even miniaturized? Is it theoretically possible to build something like a crude integrated circuit with lots of tiny tubes instead of transistors? [link] [comments]  |
| Why do objects appear smaller the further away they are? Posted: 16 Sep 2018 08:31 AM PDT |
| [Biology] How does a decrease in entropy lead to an increased reaction rate in enzymes? Posted: 16 Sep 2018 08:17 AM PDT So there's a lot going on when enzymes catalyse reactions. Here's my current understanding: When an enzyme binds a substrate it releases energy when those bindings form. It also stabilizes the substrate and manipulates it's position and conformation to reach the transition state.
So my question is how this loss in entropy lowers the activation energy. Does it have anything to do with Gibbs free energy or am I looking in the wrong direction? [link] [comments]  |
| Can somebody explain how nitinol engine works? Posted: 16 Sep 2018 07:54 AM PDT How exactly does contraction and expansion of a wire makes wheels rotate? [link] [comments]  |
| Posted: 16 Sep 2018 07:14 AM PDT |
| What are these beams (?) of I don't know what in the sunset? Posted: 16 Sep 2018 07:07 AM PDT https://imgur.com/gallery/WefHGA2 That's the link to a picture I took yesterday. I noticed that the sunset had... some kind of lines? Beams? Not sure what to call them, but hopefully you see what I mean. Could anyone tell me what those are and why they form? Does every sunset have these or is it just this one? P.S. sorry I'm posting this the third time. I seem to have failed past two times, first by not making the title a question and second by not adding a flair lol [link] [comments]  |
| Why do endorphins cause respiratory depression? Posted: 16 Sep 2018 07:04 AM PDT From my understanding, the body releases endorphins in dangerous situations (serious injury) to lessen the pain and to help us make sensible decisions. Besides that, I read that they cause respiratory depression, but why would your body want to suppress your breathing? [link] [comments]  |
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