If an isolated system reach a microstate where it has a macroscopic velocity, doesn't it violate the law of conservation of energy? |
- If an isolated system reach a microstate where it has a macroscopic velocity, doesn't it violate the law of conservation of energy?
- Why did Schrodinger put a cat in his hypothetical box?
- Other than DNA, are there any other molecules known to be aggressively self-replicating?
- Can gravitational waves pass through black holes?
- Does light exert a gravitational pull?
- If light is a constantly shifting electric/magnetic field, why does it not interact with other external electromagnetic fields?
- Do Electromagnetic waves create standing waves?
- Why does ice melt so quickly on ceramics?
- If the earth was warmer than it is now 200,000 years ago, why is an increase in the earths temp now considered man made global warming and not cyclical temperature change that has occurred over billions of years?
- Can the twin paradox be used to find the universal reference frame?
- Could gravity/gravitational force be used as a "free" energy source?
- Is there an inverse to annihilation?
- Can non-light electromagnetic waves such as gamma and radio waves be focused by a lens?
- I know that it is impossible to get faster than the speed of light but what if you are traveling at 99.9% of speed and dive in a substance where light is slower?
- If there is no static/inertial reference frame in the universe, what frame is used to numerically solve and animate celestial simulations?
- Is it just a coincidence that the powers of 11 can be read off of the rows of Pascal's triangle?
- Are there any real, reputable, credible scientists who actually believe the results of the double slit experiment is evidence of parallel universes?
- How does Pauli-exclusion principle apply to the entire universe ?
- If an answer if feasible, how many minutes is a meter? If not, why not?
- Can somebody debunk this for me?
| Posted: 04 Jun 2016 05:37 AM PDT I know this is very, very, very unlikely edge case, but let's say that an isolated system, with an incredible luck, reach a microstate where the direction of their microscopic speed synchronise, in such a way that the system has a macroscopic speed. This mean we have a ΔE=ΔEc (ΔU=0 and ΔEp=0 too), yet the system is isolated so it should have a ΔE=W+Q=0. I was wondering where the mistake was in my reasonning. [link] [comments]  |
| Why did Schrodinger put a cat in his hypothetical box? Posted: 03 Jun 2016 05:08 PM PDT It's always troubled me, because surely the cat is itself an observer. The cat knows whether it's alive or dead so it seems it would only ever be in one state. Why not have a simple piece of machinery, like a clock? (Of course you'd need to replace the poison gas with some other means effective against clocks) [link] [comments]  |
| Other than DNA, are there any other molecules known to be aggressively self-replicating? Posted: 03 Jun 2016 04:22 PM PDT |
| Can gravitational waves pass through black holes? Posted: 03 Jun 2016 04:25 PM PDT |
| Does light exert a gravitational pull? Posted: 03 Jun 2016 02:55 PM PDT I know light can be affected by gravity (ie curve around black holes and such) but could sufficiently large amounts of light energy exert a gravitational force on things? E=mc 2 and all that? [link] [comments]  |
| Posted: 03 Jun 2016 11:44 PM PDT I understand that photons themselves lack charge, and light interacts with things like other photons and electrons etc. but why don't the electric and magnetic field interact with, say the magnetic field around a magnet? [link] [comments]  |
| Do Electromagnetic waves create standing waves? Posted: 04 Jun 2016 06:48 AM PDT |
| Why does ice melt so quickly on ceramics? Posted: 03 Jun 2016 11:12 AM PDT Science teacher here - I conducted an experiment with my students to see how different surfaces affect the rate at which ice melts. (see video here: https://www.youtube.com/watch?v=-92_EUklcMU) Every time the ice on the ceramic has melted the fastest. I've been trying to work out why this is. I found this old question which I think explains why ceramics can be such good insulators, despite a high specific heat. But I still don't understand why that means the ice will melt faster. Surely as an insulator the rate of heat transfer will be lower?? What am I missing? https://www.reddit.com/r/askscience/comments/1b0bqt/why_are_ceramic_materials_such_good_thermal/ [link] [comments]  |
| Posted: 04 Jun 2016 06:00 AM PDT |
| Can the twin paradox be used to find the universal reference frame? Posted: 04 Jun 2016 04:31 AM PDT The shortest path between two points is the straight line, applying this to space-time would mean, that the slower I moved through space the faster time advanced for me. Couldn't we use a bunch of very accurate clocks, send them in different directions and then check which one shows the most elapsed time? [link] [comments]  |
| Could gravity/gravitational force be used as a "free" energy source? Posted: 03 Jun 2016 02:43 PM PDT |
| Is there an inverse to annihilation? Posted: 03 Jun 2016 11:57 AM PDT We learned about annihilation in Physics today, and I was wondering if, similar to Math concepts, there was an inverse reaction to particle anti-particle annihilation. [link] [comments]  |
| Can non-light electromagnetic waves such as gamma and radio waves be focused by a lens? Posted: 03 Jun 2016 03:31 PM PDT |
| Posted: 04 Jun 2016 12:43 AM PDT I know that it is impossible to get faster than the speed of light but i read that the speed of light is slower underwater (225,000,000 m/s). So what if you are traveling 99.9% of the speed of light in the air and dive underwater and contain the same speed? Would you be traveling faster than the speed of light that is underwater? What if we discover another liquid where light is even slower, would it be possible to catch up on it? English isnt my first language so sorry if i made any mistakes [link] [comments]  |
| Posted: 03 Jun 2016 09:41 AM PDT Or, is it an order-of-magnitude thing where the expansion of the universe can be ignored? [link] [comments]  |
| Is it just a coincidence that the powers of 11 can be read off of the rows of Pascal's triangle? Posted: 03 Jun 2016 09:49 AM PDT I remember being amazed in my maths class last year when I saw this demonstrated but I never got an adequate explanation as to why it occurred [link] [comments]  |
| Posted: 03 Jun 2016 08:36 AM PDT |
| How does Pauli-exclusion principle apply to the entire universe ? Posted: 03 Jun 2016 06:57 PM PDT From what I understand, Pauli-exclusion principle states that no two electrons can have the same 4 quantum numbers. In high school I learnt that this applies to any two electrons within an atom but I have recently learnt that it applies to any two electrons in the entire universe. I have the following questions about this : 1. Does this violate the law that information cannot travel faster than the speed of light ? 2. How does every electron know what state every other electron is in the universe ? 3. What implications does this have on spectroscopy? We identify a hydrogen atom by its signature emission spectrum. But if the electron in every hydrogen atom in the universe is at a slightly different energy state, the energy spectrum for all the hydrogen atoms would be different right ? PS : Please explain in as simple terms as possible, I am not a physics major. Thank you [link] [comments]  |
| If an answer if feasible, how many minutes is a meter? If not, why not? Posted: 03 Jun 2016 02:50 PM PDT If the idea of spacetime makes sense, then it seems space and time are aspects of the same whole. If that's the case, then surely they're able to be converted back and forth. So... How many minutes is a meter? Or how many meters is a minute? Or am I just talking nonsense? And if so, why? Thanks :) PS: My notion of why I'm wrong in the question, is that perhaps time and space perform similarly within modelling which means simpler times all around, but that it doesn't mean they're actually aspects of the same thing. If that makes sense. [link] [comments]  |
| Can somebody debunk this for me? Posted: 03 Jun 2016 07:03 AM PDT Somebody posted this video on facebook... It appears that he's using an "electromagnetic radiation detector" that name sounds vague to me... as visible light is electromagnetic radiation too... And he's... waving around qurtz crystals and some amulet or something... https://www.facebook.com/100006776805286/videos/1643039052598639/ [link] [comments]  |
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