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  1. E

    Quantum Numbers

    n=2, L=m(l)=0 should be correct for the reasons you have outlined above. If you are being asked for the corresponding Set(!) of quantum numbers I believe you want to include both the spin-up and spin-down states in your answer.
  2. E

    Three coupled pendula

    Thanks a bunch. That did the trick =) Of pure curiosity, what would happen if we in fact had a degenerating force?
  3. E

    Three coupled pendula

    Homework Statement Derive the equations of motion for three identical pendula A, B and C, of mass m and length L coupled together (A to B and B to C) with two identical springs of low spring constant k. Can't quite appreciate the forces acting on these pendula as they all should be...