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In Marsden, Ratiu - Introduction To Mechanics And Symmetry there is a certain focus on reducing cotangent bundles of Lie groups. More precisely, if $G$ is a Lie group,...
Asked on 08/18/2021 by marmistrz
0 answerPanofsky and Philips state the multipole expansion of a potential due to a volume charge distribution $rho$ in a finite volume $V$ given by $phi(mathbf R)=frac{1}{4piepsilon_0}int_Vfrac{rho(mathbf r')}{|mathbf...
Asked on 08/18/2021
0 answerI have seen that it is often stated that Babinet's principle is only valid in the far field limit/Fraunhofer condition as it makes use of the linearity of the fourier...
Asked on 08/18/2021
1 answerI have one question regarding the definition of the micron-canonical ensemble (which also should apply to other types of ensembles). The definition from Wikipedia is : "In statistical mechanics, the...
Asked on 08/18/2021
0 answerI wanted to find the resonance frequency of a steel ball. I assume that gradient disappears on the surface of a ball. I knew that I can find it solving...
Asked on 08/18/2021
1 answerAccording to the textbook I am reading (Fundamentals of Heat and Mass Transfer by Incropera), Fourier's law of thermal conduction, $q_x=-kAfrac{dT}{dx}$, is a law based on experimental evidence, not...
Asked on 08/18/2021
1 answerI am looking into pendulum physics for a real life application. In short I need to have a reasonable estimate of the horizontal stress applied by a swing mechanism...
Asked on 08/18/2021 by Aderam
1 answerWhat is the best length ratio of 'tongue' element of the brick to brick wideness shown on the picture to resist an ertquake stres? Should the ratio be less than...
Asked on 08/18/2021
0 answerSay I have two density matrices $rho_0 = sum_{i,j} alpha_{i,j} |irangle langle j|$ and $rho_1 = sum_{i,j} beta_{i,j} |irangle langle j|$. What is the density matrix $rho$...
Asked on 08/18/2021 by user6584
2 answerWhy is not $q$-Gaussian distribution merely the substitution of q exponential into the gaussian function?, i.e. substitution of equ.2 in equ.1. Where would there be three cases as below....
Asked on 08/18/2021
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