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I'm a bit confused regarding the directions of velocities and acceleration in curvilinear motion. Assume a curvilinear motion, which is not circular. I know that tangential component of velocity and...
Asked on 07/25/2021
1 answerA while ago I came across a resource (which I have forgotten) on the validity of Boltzmann's equation. It talked about the fact that the Boltzmann's equation is valid at...
Asked on 07/25/2021
1 answerThe DeSitter spacetime line element in global coordinates is given by $$ds^2 = -dt^2 + frac{1}{H^2}cosh^2(Ht)left(dchi^2 + sin^2(chi)(dtheta^2 + sin^2(theta)dphi^2 right).$$ The ranges of the coordinates are given by...
Asked on 07/25/2021
1 answerWhat does happen if I push a piston in an adiabatic cylinder containing an ideal gas? According to Ideal Gas Equation: $$PV=nRT$$ Is it possible to predict what's going to...
Asked on 07/25/2021
3 answerAnd if so, how much energy would have to be expended before you could possibly measure the loss (since gravity is very weak)? Let's say the load is 1000m above...
Asked on 07/24/2021 by yincrash
4 answerIn platinum resistance thermometers, the resistance varies slowly at lower temperatures and rapidly at high temperatures. Similarly, the expansion of mercury isn't uniform either. So the readings of mercury thermometers...
Asked on 07/24/2021
0 answerA rough inclined plane is placed on a cart moving with a constant velocity u on horizontal ground. A block of mass M rests on the incline. Is any work...
Asked on 07/24/2021 by may
2 answerI was reading something to do with elliptic motion and I came across using the equation of orbital velocity to determine the centripetal force acting on a body. So for...
Asked on 07/24/2021
0 answerForgive me if what I’m asking is too naive for this site. I'm a math student who is recently studying electrodynamics and gauge theory myself. While I'm aware of the...
Asked on 07/24/2021
1 answerI'm talking about this nonsense: http://www.washingtonpost.com/news/post-nation/wp/2014/06/11/this-is-the-amazing-design-for-nasas-star-trek-style-space-ship-the-ixs-enterprise/ Now, I'm aware that there are problems with the practicalities (or possibilities) of methods involving exotic matter with negative mass, and that...
Asked on 07/24/2021 by Larry Gritz
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