Question 14 (5 points) Listen Fortunately, your PHY143 instructor was able to stop the car before hitting you and Electr

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Question 14 5 Points Listen Fortunately Your Phy143 Instructor Was Able To Stop The Car Before Hitting You And Electr 1 (95.71 KiB) Viewed 70 times

Question 14 (5 points) Listen Fortunately, your PHY143 instructor was able to stop the car before hitting you and 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!" 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 kg = 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. 2.12 x 1017 m-3 eV-1 1.50 x 1028 m-3 eV-1 1.00 m-3 eV-1 1.41 x 10-11 m-3 eV-1 m