Answer Happy

Electra. As soon as she got off the car, she looked cautious and said "I think the aliens are coming... I can tell because the density of unoccupied state of the metal on my iwatch band is changing! I know that the density of states at E = 4.86 eV is 1.50 x 1028 m-3 eV-1, and the fermi energy of this metal is 5.48 eV. What is the density of states now? This number is the key to figure out when the aliens are coming!" x = You checked the temperature outside, and found out that it was 288 degrees Kelvin. What is the density of unoccupied states at that E? Use kB = 8.617 x 10-5 eV/K and keep as many digits as you can while calculating! Due to the exponential function involved, the answer is very sensitive to the number digits you use. 1.41 x 10-11 m-3 ev-1 O 1.00 m 3 eV-1 1.50 x 1028 m 3 eV-1 m 2.12 x 1017 m-3 -3 eV-1