When we consider the two-electron states of helium in perturbation theory, we take the e-e coulomb interaction to be the perturbation. a) what is the unperturbed energy and degeneracy of the multiplet of first excited states including spin? b) construct the states for 1-0, 3-1 and for 1-1, s 0 as properly symmetrized linear combinations of |space〉 |spin) c) without doing any calculation, which (if any) of the states in (b) have the lower energy when including the perturbation? give a physical argument justifying your answer.

magnityde and direction

32: from largest to smallest, this hierarchy includes eons, eras, periods, epochs, and ages.

33: answer is c

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adding a(n) to an electric circuit would increase the magnetic field around a wire;

b. solenoid

a solenoid is a type of electromagnet whose purpose is to generate a controlled magnetic field.

if the purpose of the solenoid is instead to impede changes in the electric current, a solenoid can be more specifically classified as an inductor rather than an electromagnet.