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I've been thinking about this for a while but can't get my head around it. A black hole's mass is such that its gravity can overcome light. Its event horizon,...
Asked on 02/11/2021 by ScaryAardvark
4 answerI have seen both equations, $A^{alpha}=(phi,vec{A})$ is from Wikipedia and $A_{alpha}=(phi,vec{A})$ is from my lecture. Which one is right? My thoughts: As far as I...
Asked on 02/11/2021
2 answerGiven a uniformly charged hemispherical shell of radius $R$, I want to calculate the potential at the center of the shell.I can use the equation $V=kintfrac{sigma}{r}da$, where...
Asked on 02/11/2021 by 1500kook12
1 answerA reversible process can be represented on a $T-S$ plane, and the area under the curve is the heat exchanged by the system. On $P-V$ plane a irreversible process is...
Asked on 02/11/2021
2 answerThe momentum space Feynman rules state that we "integrate over all undetermined momenta" and "impose momentum conservation at each vertex". This is given for example on page 95 of Peskin...
Asked on 02/11/2021
1 answerRaoult's Law states that vapor pressure decreases when a non-volatile solute is present. Boiling point is when vapor pressure = ambient pressure. Since vapor pressure is less, shouldn't the energy...
Asked on 02/11/2021 by Kashif Qureshi
0 answerI have an acceleration function in python with position and time parameters and returns the acceleration value. I need the end velocity at a position ,start velocity is zero. how...
Asked on 02/11/2021 by MohamadAli Zeraatkar
1 answerI am currently learning about fluid dynamics in special relativity. We defined the stress-energy-tensor of a perfect fluid to bebegin{equation}T^{mu nu} = (rho + P) u^mu u^nu...
Asked on 02/11/2021 by tomtom1-4
2 answerAssume we have 2 identical particles at $z_1$ and $z_2$ and an incident plane wave propagating along $z$.The scattering amplitude $f(theta)$ and differential cross section...
Asked on 02/11/2021 by Ronan Tarik Drevon
0 answerI am starting a course in thermodynamics, and two assumptions that the instructor listed for equations of state to apply is that:the system is invariant with time; andthat the bulk...
Asked on 02/11/2021 by Padraig Stapleton
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