Given the Fermi energy, EF for copper at T = 0 K is 7.00 eV and the electrons in copper follow the Fermi-Dirac distribution function. Using Fermi -Dirac equation, show that the probability of an energy level at 7.15 eV being occupied by an electron at T = 0 K is different as compared at T = 300 K. Illustrate the probability of occupation of energy levels by electrons at T =0 K and at T = 300 K using well labelled diagram. Given Boltzmann constant, KB = 8.617 x10-5 eV/K).

16 Please help thank you

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number 30

Problem 4: Speed deamplifier. In the figure above on the right, block 1 of mass m1 slides along an x-axis on a frictionless floor at speed 4 m/sec.Then it undergoes a one-dimensional elastic collision with stationary block 2 of mass m2 = 2m1. Next, block 2 undergoes a one-dimensional elastic collision with stationary block 3 of mass mz = 4m1. What then is the speed of block 3? Answer: 16 m/sec or 1.78 m/sec.