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Referring to the Drude Model, I've seen a lot of excellent questions on whether $tau$ should be thought of as the "average time between collisions" or the "average time...
Asked on 02/10/2021
1 answerLet's say we have a system with Hamilton equations begin{equation}dot{Y}^A = Omega^{AB}H_{,B}end{equation}where the coordinates are begin{equation}Y^A=big(q^i,p_jbig)end{equation}where $i=1,dots,N$ and $j=1,dots,N$, ...
Asked on 02/10/2021
0 answerUff, thats kinda a tricky question to express. But why is it? The intensity-distribution-function looks also complicated so I can't really derive it from the equation. Someone has an intuitive...
Asked on 02/10/2021
1 answerAccording to Can Impossible Vacuum balloon be possible with this idea?, a vacuum balloon is impossible. Why is that?...
Asked on 02/10/2021
1 answerI have looked several special relativity books but in each of them the metric is defined as $eta_{numu} = (+1, -1, -1, -1)$. Is there a book where the...
Asked on 02/10/2021
0 answerThis is the circuit of small signal analysis for a BJT amplifier. The current shouldn't flow at all. How is it even flowing ? I'm attaching the snap shot of...
Asked on 02/10/2021 by Ayosh Maitra
1 answerI've read several times that if a discrete symmetry is spontaneously broken, then there exist domain walls that interpolate between the different vacua. However, Weinberg says that if the former...
Asked on 02/10/2021 by Alonso Perez Lona
1 answerDo we know of any quantities that are conserved on the global scale of the universe? Is there an associated continuous symmetry? I.e. momentum and energy are not globally conserved...
Asked on 02/10/2021 by Robson Christie
0 answerThe buoyant force exerted by an object in water is given by $rho.g.v_{submerged}$ Which only depends on the volume submerged and nothing else(I think) But can it be applied...
Asked on 02/10/2021
1 answeris there any way to make electromagnetic waves reach a cell phone in Faraday cage although conductor surround cell phone everywhere? can we pass current through conductor to make charges...
Asked on 02/10/2021 by Mai Fouad
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