Why does removing a battery and replacing the same battery (in a wireless mouse for example) work? |
- Why does removing a battery and replacing the same battery (in a wireless mouse for example) work?
- If a Voyager I type probe were to approach Earth, at what distance/ range would it be from us until we could faesibly interact with it or retrieve it?
- Why is the inverse square law so prominent in physics?
- Why can't photon have spin 0?
- What happens to the entropy of an object that gets sucked into a black hole?
- What's the difference between soft and hard rubber on the molecular level?
- Would an hourglass measure the same amount of time on a planet/moon with a different gravitational pull?
- Discussion: MinuteEarth's Newest Video On The Geographic Origins Of Different Foods
- Can an endergonic reaction produce light?
- Is the vapor from a liquid in equilibrium hotter than the liquid itself and if so does that violate thermodynamic principles?
- Why is it currently less common for the earth to encounter a large comet or asteroid than it was millions of years ago?
- Do we know the shape of the nucleus in an atom? We learned in school that its a a cluster of protons and neutrons but is there any proof of this? Can it be one round ball holding all of the information in a quantum state(meaning it could be in any place within the ball)?
- If the size of electrons and protons are not equal, how is it that the charge/effect they have on the atom is equal?
- Is the Placebo Effect present in any animals beside humans?
- What are some examples of environmental toxic outbreaks?
- What actually changes between weaker and more powerful versions of hardware? And what makes it more expensive?
- Why is the southwest area of China cold?
- Why does FTL/tachyons defy causality?
- Is Kirchhoff's law in electronic circuits just Faraday's law for electrostatics?
- Radioactive decay, rocks, and helium, as radioactive material decay helium is released, shouldn't there be no helium in the rocks at this point due to the age of the earth and the rate of decay?
- If a telescope can show light from a star 900 years ago, would a larger telescope one the same star show the light more recently?
- How do we know that entangled particles don't have predetermined spins from the very start?
| Why does removing a battery and replacing the same battery (in a wireless mouse for example) work? Posted: 25 May 2017 06:25 AM PDT Basically as stated above. When my mouse's battery is presumably dead, I just take it out and put it right back in. Why does this work? [link] [comments]  |
| Posted: 25 May 2017 06:37 AM PDT |
| Why is the inverse square law so prominent in physics? Posted: 25 May 2017 06:40 AM PDT Almost every subject that my physics coursework covers has included an inverse square law (Newton's law of gravitational attraction, Coulomb's Law, Biot-Savart Law, intensity of radiation, etc). Is there something fundamental about an inverse square law, or is this all just purely coincidental? [link] [comments]  |
| Posted: 24 May 2017 09:58 AM PDT The z-projection of the photon's spin could be m_s = 0, +-1. Why though is m_s always -1 or +1? I understand that if m_s was zero, this would imply that the spin lies in the x,y-plane. Why is this not possible? [link] [comments]  |
| What happens to the entropy of an object that gets sucked into a black hole? Posted: 25 May 2017 06:31 AM PDT Thinking of a black hole as an infinitesimal point implies it to only have one microstate. Since entropy, as I remember, is proportional to the log(# of microstates), a black hole would have zero entropy. This appears to violate the second law of thermodynamics; the entropy cannot disappear?? [link] [comments]  |
| What's the difference between soft and hard rubber on the molecular level? Posted: 25 May 2017 06:31 AM PDT |
| Posted: 24 May 2017 05:59 PM PDT |
| Discussion: MinuteEarth's Newest Video On The Geographic Origins Of Different Foods Posted: 24 May 2017 09:35 AM PDT Hello everyone! Today on AskScience we're going to learn about where our food comes from! No, not just the ground, but the geographic origins of different foods! You can check out MinuteEarth's new video about the topic here. We are joined by the video creator Alex Reich (/u/reichale) as well as two experts on the subject. Colin Khoury (/u/Californensis) is a research scientist at the International Center for Tropical Agriculture (CIAT) and the USDA National Laboratory for Genetic Resources Preservation. He studies how changes in global crop diversity affect human health and the environment, and is particularly interested in the wild relatives of food crops. Nathanael Johnson (/u/Nathanael47) is a Grist staff writer and the author of two books. Nate specializes in stories about food, agriculture, and science. He has written pieces for Harper's, This American Life, and New York Magazine. He lives in Berkeley, California. Feel free to hit them with username mentions in your comments. [link] [comments]  |
| Can an endergonic reaction produce light? Posted: 25 May 2017 04:47 AM PDT |
| Posted: 24 May 2017 08:28 AM PDT In an adiabatic container, if you put a liquid there, at certain pressure there would be some particles with enough kinetic energy to overcome the inter-molecular forces and escape. So the gas must be made only of particles with high energy so the temperature must be higher. Summing up, what would happen is that an object at temperature T would spontaneously "split up" into an object with less temperature and another with higher temperature. Isn't this against thermodynamic principles? What is wrong with my reasoning? [link] [comments]  |
| Posted: 24 May 2017 03:26 PM PDT I was reading Astrophysics for People in a Hurry and one of the lines gave me pause "earth's occasional encounters with large comets and asteroids, a formerly common event" NDG doesn't explain why this is, simply that it was formerly a common event. I assumed that it was either the universe was expanding and now there is more room and less collisions. Or perhaps that there are now less comets and asteroids since over time they have collided and been destroyed? Or something else I didn't think of at all? Thanks! [link] [comments]  |
| Posted: 24 May 2017 05:00 PM PDT |
| Posted: 24 May 2017 04:57 PM PDT I understand that protons are about 2000x bigger than an electron. For example, why, then, does it not require ≈ 2000 electrons in a Hydrogen atom for it to have a neutral charge? Why the 1:1 ration if the electron is so much smaller? Even further, I suppose, how is it that these parts of the atom even have a charge? What is it about them that allow them to be positivie or negative? Thank you! [link] [comments]  |
| Is the Placebo Effect present in any animals beside humans? Posted: 24 May 2017 03:58 PM PDT |
| What are some examples of environmental toxic outbreaks? Posted: 25 May 2017 05:29 AM PDT I'm looking to study environmental science in a few months and I'm reading up on toxic outbreaks but so far can only find examples such as toxic cynanobateria. I'm curious to know more. Does anyone know of any severe outbreaks? Is there an outbreak that has only presented in the last 10 years? Thank-you :) [link] [comments]  |
| Posted: 24 May 2017 09:12 AM PDT Most all electronics come in vastly different levels of computational power, speed or storage space. But iterations of one type of hardware - especially if they are the same brand and/or form factor - tend to look the exact same, externally. CPU's are mostly the same size, aren't they? And even more so with storage devices: m.2 SSDs all look more or less the same! SD cards - or microSD - look all alike, even those times when I could find teardowns of them . . . yet, there is a vast difference between speeds or storage size! Which brings me to the second part of this question: pricing. I would instinctively say that materials should make up most of the cost of any given piece of tech - with manufacturing, R&D, marketing and the like not being as incisive, given the sheer amount of products made and sold. And given that, as I said earlier, form factors are mostly the same, I would think that the internals shouldn't differ that much! Yet, there is sadly an all too tangible difference between a i3 and a i7 CPU (and even more so across generations), or between a ~$13 32GB microSD, and a $200 256GB one! [link] [comments]  |
| Why is the southwest area of China cold? Posted: 25 May 2017 07:38 AM PDT As shown in this picture http://imgur.com/a/QqnJ6 from this website ventusky.com What makes such a large difference between India and China? [link] [comments]  |
| Why does FTL/tachyons defy causality? Posted: 25 May 2017 05:18 AM PDT It is my understanding that causality, being cause and effect, would be defied by reverse-time-travel. If I know Jim is going to die before he does, I can prevent it; causality broken. That being said, if I know he's going to die before the photons showing his death strike me, I am no more able to prevent it than if I find out by conventional means. No matter how fast you are, even including FTL movements and instantaneous reflexes, you can not prevent an event that has occurred. I have a redditor's understanding of why FTL is impossible for known-particles, keep in mind that this question is about causality specifically. edit: is it just because the object would also move backward in time? [link] [comments]  |
| Is Kirchhoff's law in electronic circuits just Faraday's law for electrostatics? Posted: 25 May 2017 01:30 AM PDT The integral of the electric field along a closed path is zero. Although electronic circuits aren't really electrostatics, as the charges are moving around. [link] [comments]  |
| Posted: 24 May 2017 09:20 AM PDT |
| Posted: 25 May 2017 04:49 AM PDT I think that title is probably a mess. I use telescope 1 to view star A and it took that light 900 years to travel to telescope 1. If I use telescope 2 (which is much stronger than telescope 1) to view star A, would it be possible that the light is only 850 (random number) years old? [link] [comments]  |
| How do we know that entangled particles don't have predetermined spins from the very start? Posted: 24 May 2017 02:49 PM PDT If we measure one of entangled particles, the other one immediately gets opposite spin. But how do we know that their spin wasn't "chosen" before we measured them? Like, upon creation one was up-ish and the other was down-ish. We can't possibly know their spin without measuring, right? [link] [comments]  |
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