) A 2000 foot long power line carries 20 A and must not lose more than 40 Watts. The cable has an applied load of 2720 kg. Choose between silver and gold as materials for this application strictly on a cost basis while meeting specified electrical conductivity and elastic modulus requirements. Use a factor of safety of 1.6 on the yield stress for the given loading. It may be helpful to calculate the required area of each of the two candidate materials necessary to support the applied load.