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  1. Q

    Gibbs distribution

    In canonical ensemble all energy values are permitted. The distribution of energies of system at temp T follows Gibbs Distribution. My question is simple. Why is it that all energies are permitted?? forget the mathematical derivation. How to understand it physically. Does it not take the...
  2. Q

    Is the lagrangian always K.E-PE?

    Is the lagrangian always K.E-PE? I don't think so? so WHAT REALLY is the physical significance of the lagrangian? Superficially it appears to be KE-PE,but the lagrangian for a charged particle in a vector potential is 1/2MV.V +qV.A-qW. where V=velocity A=vector potential...