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In Kleppner's Mechanics, there is a problem given asA rope of mass $M$ and length $l$ lies on a frictionless table, witha short portion, $l_0$, hanging...
Asked on 11/21/2020
2 answerGiven a semiconductor junction between a p-type and an n-type semiconductor, the free charges redistribute themselves until an equilibrium is attained i.e. some of the free electrons (holes) will move...
Asked on 11/21/2020
2 answerI noticed this the other day. I don't really know "what" this means, I'd love to understand.The energy operator is $hat E = -i hbar frac{partial}{partial t}$. Conservation of...
Asked on 11/21/2020
1 answerIf we consider two systems with number of accessible microstates A and B and internal energies of E(A) and E(B) that are exchanging an small amount of heat Q from...
Asked on 11/20/2020
0 answerWe have antisymmetric wavefunctions for a fermionic systems and symmetric wavefunctions for bosonic systems that give us a hint that quantum states can be occupied by a single fermion(or none)...
Asked on 11/20/2020
1 answerAlthough I've seen the typical no-bias, reverse-bias and forward-bias band diagrams associated with the PN junction and seen the overlapping valence and conduction bands of a typical metallic conductor, I...
Asked on 11/20/2020 by Ted Jackson
1 answerWe have incompressible air flowing through a cylindrical pipe, from section A to section B. The process is considered to be stationary. My theory book says that, because of the...
Asked on 11/20/2020 by Jose Lopez Garcia
2 answerI believe that squeed vacuum can be represented in the Fock state basis as: $|mathrm{SMSV}rangle=frac{1}{sqrt{cosh r}} sum_{n=0}^{infty}left(-e^{i phi} tanh rright)^{n} frac{sqrt{(2 n) !}}{2^{n} n !}|2 nrangle$ Looking at pictures,...
Asked on 11/20/2020 by Steven Sagona
1 answerThe most classical quantum theory experiment is the dual slit experiment where photons or electrons can be sent through one or two slits to see the pattern they create on...
Asked on 11/19/2020
0 answerThe weak vector bosons are spacetime vectors (spin 1) and also incidentally weak isospin vector components (-1, 0, +1). I understand why that is required from nucleon beta decay and...
Asked on 11/19/2020 by Jim Eshelman
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