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why do 2 solenoids, placed on the same axis and carrying current in the same sense, attract each other? I know that they can be modelled as magnetic dipoles, and...
Asked on 12/28/2020
2 answerI am studying thermodynamics (undergraduate level) and I am not sure I understand what happens in irreversible processes. I thought I understood but then I got confused in the Joule...
Asked on 12/28/2020 by alexk745
1 answerThe standard question asked about the expansion of the Universe sounds roughly like: "Does my pencil expands, together with expansion of the Universe?" And the standard answer sounds roughly like:...
Asked on 12/28/2020 by Kostya
2 answerI am currently trying to implement a particle simulation with the Lattice Boltzmann Method. The current task is to use the following equation to calculate the kinematic viscosity of the...
Asked on 12/28/2020 by Albert Lidel
0 answerFermat's principle states that light always takes the path for which the optical length is stationary. begin{align}deltaint n(vec{r}) :mathrm ds = 0.end{align} Furthermore, it is equivalent to...
Asked on 12/28/2020 by Snowraider
0 answerI am currently in highschool and don't know maxwell's equations much. However I do know about Faraday's law and recently we were taught about Electromagnetic Induction. I am having a...
Asked on 12/28/2020 by Physicsa
1 answerThe Lorentz boosts are represented by symmetric $4times4$ matrices. Though the most general Lorentz transformations has no obvious symmetry property, can the symmetry (under transpose) of the Lorentz boost...
Asked on 12/28/2020
4 answerLet's say there are two planets, without an atmosphere, sharing orbit and equal in every way except their size: planet 1 is 10x larger than planet 2. Heat into the...
Asked on 12/28/2020 by VintageLime
1 answerAs it is well known, electrons at equilibrium (no external field) do not conduct electric current, i.e. $int_{BZ} dk,v_{k},f(epsilon_k)=0$ where $f(epsilon_k)$ is the Fermi-Dirac distribution $f(epsilon)=frac{1}{e^{beta(epsilon-mu)}+1}$ $v_k$ is the velocity...
Asked on 12/28/2020 by Gippo
1 answerDoes Hubble's constant apply to galaxies that are moving towards Earth with a velocity and does Hubble's constant also able to different systems such as binary stars, stars in another...
Asked on 12/28/2020
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