1. Consider three wires of equal lengths and diameters. One is copper, one is aluminum, and one is silicon. For simplicity assume all effective masses are equal to the electron mass. A. Using the values in the table fill in the missing values (highlighted) B. What is the conductivity of the three materials. C. What is the mean free path of the conduction electrons in each material at room temperature (298 OK). D. How much would you have to stretch the copper wire to make it the same resistance as the aluminum wire? E. If the silicon wire is 1 mm in diameter, how thin must to aluminum wire be to have the same resistance. material density atomic wt atoms g/cc amu 1/m^3 e's/atom e density 1/m^3 aluminum 2.7 26.78 3 mobility onductivit m^2/V-s S/m 1.20E-03 mfp nm copper 8.96 63.546 1 4.50E-03 silicon 2.33 28.1 5.00E+15 1.45