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Consider the following situation: a certain gas is contained in a well-insulated cylinder with a well-insulated piston head. Now, in this case the piston is not frictionless. In order for...
Asked on 02/24/2021
3 answerFrom the ground you obviously cannot hear any sound from a developing cumulus cloud, no matter how vigorous it is. BUT: Are there sound waves generated, e.g. at the cloud...
Asked on 02/24/2021 by Aziraphale
2 answerSuppose we have two events $(x_1,y_1,z_1,t_1)$ and $(x_2,y_2,z_2,t_2)$. Then we can define $$Delta s^2 = -(cDelta t)^2 + Delta x^2 + Delta y^2 + Delta z^2,$$ which...
Asked on 02/24/2021 by Gold
5 answerIn the Bogoliubov theory for the weakly interacting Bose gas, the Bogoliubov transformation from bosonic creation (annihilation) operators $hat{a}_p^{(dagger)}$ to the new set of creation (annihilation) operators ...
Asked on 02/24/2021
1 answerI recently completed an experiment using white light through both a circular aperture and four-piece diffraction slide at the same time. I'm trying to qualitatively explain what I'm seeing, which...
Asked on 02/24/2021 by physkid
1 answerAccording to Gauss's law of magnetism, the total magnetic flux through a closed surface is zero. But during induction, we study that the magnetic field lines passing through a coil...
Asked on 02/24/2021 by OFFplanet
2 answerI was wondering if maybe someone could look at this excerpt from a textbook (Attached). It states that “the displacement of the two masses will be in opposite directions (out...
Asked on 02/24/2021
2 answerIf I have two 20ml test tubes connected at the base via a thinner flexible U-shape tube and I pour a set amount of water (40ml) into one test tube...
Asked on 02/24/2021 by materialseng
1 answerThis video* (linked at the correct time of 0:26 sec) shows a scene inside a room of a home. Apparently projected on the wall is an imperfect...
Asked on 02/24/2021
1 answerIt is well-known that a hydrogen atom in free space prepared in an excited state, for example $left| 2p_y rightrangle$, will over time decay into the ground state ...
Asked on 02/24/2021
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