Problem 3 The density of copper is 8.96 gm/cm³, and its atomic weight is 63.5 gm/mole. a) Calculate the Fermi energy for copper. Assume q=1, and give your answer in electron volts. b) What is the corresponding electron velocity? c) At what temperature would the characteristic thermal energy (kBT, where kB is the Boltzmann constant and T is the Kelvin temperature) equal the Fermi energy, for copper? d) Calculate the degeneracy pressure of copper, in the electron gas model.