Using Equation 20.15, find the Fermi level in eV and the corresponding thermal temperature (using εf ≈ (3/2)kT) for each of the following systems (assume that each is nonrelativistic):
(a) the electrons in a white dwarf star, whose electron density is about 1035/m3;
(b) the protons in a white dwarf star, whose proton density is comparable with that of the electrons;
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(c) the 30 neutrons in an iron nucleus, which is a sphere of radius 5.0 × 10−15 m.