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I'm trying to explain Bernoulli's principle (in the context of flight) to an audience that doesn't have a physics background. So I'd like to avoid mentioning technical concepts as much...
Asked on 11/25/2021
1 answerIn the concluding section of this post user Chiral Anomaly states following:On the other hand, since any stable marriage of quantum theory and gravity (in the sense of general...
Asked on 11/25/2021
1 answerWe know that $text{density}= frac{text{mass}}{text{volume}}$, and density of water is $1000, text{kg/m}^3$.If I want to float a $100 ,text{kg}$ metal block then using the above formula...
Asked on 11/25/2021
2 answerIn Goldstein's classical mechanics (page 36) he introduces the basics of the calculus of variation and uses it to effectively the Euler-Lagrange equations. However, there is a step in which...
Asked on 11/25/2021
2 answerI know that, for example we have $$frac{delta g^{jk}}{delta g^{lm}}=delta^{j}_{(l}delta^{k}_{m)}.$$This topic was discussed previously e.g. on Physicsforums.com and on Phys.SE. So I was wondering,...
Asked on 11/25/2021
0 answerI read that according to classical wave theory, light is viewed as a wave whose intensity is continuously variable. And for this reason, it is unable to explain the photoelectric...
Asked on 11/25/2021
2 answerCan insulators like plastics be charged with the help of conduction? What happens when such materials are brought in contact with charged bodies that might be conductor or insulator?...
Asked on 11/25/2021
1 answerConsider a complex scalar field with Lagrangian$$mathcal{L} = (partial_{mu} bar{phi})(partial^{mu} phi) - V(phi)$$with potential$$V(phi) = frac{1}{4}lambda(bar{phi}phi - eta^2)^2$$The model is invariant under global ...
Asked on 11/25/2021
2 answerWe know gapless Goldstone mode appears when the system exhibits spontaneously symmetry broken. Does this means whenever we observe gapless acoustic modes it is Goldstone mode i.e. spontaneous symmetry broken?...
Asked on 11/25/2021
1 answerI'm trying to understand the equation of motion for rigid body dynamics in the presence of a quaternion joint for the root of a humanoid robot. But the dimensionality inconsistency...
Asked on 11/25/2021
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