Problem 3: A particular aluminum transmission line has a resistance per length of 0.062 Ģ/km. Assume aluminum has a resistivity of 2.65 10^-8 Ģ m and a density of 2.70 10^3 kg/m^3.
50% Part (a) What is the mass of one kilometer of this line, in kilograms?
50% Part (b) What is the mass, in kilograms per kilometer, of a copper line having the same resistance as the aluminium one? Copper has a resistivity of 1.72 10^-8 Ģ m and a density of 8.90 10^3 kg/m^3.