Q1. As an energy-efficiency consultant, you're asked to assess the pumped-storage facility. Its reservoir sits 136 above its generating station and holds 9.0×10^9 of water. The power plant generates 315 of electric power while draining the reservoir over a 7.6 period. Its efficiency is the percentage of the stored potential energy that gets converted to electricity.
Q2. A concrete highway curve of radius 60.10 m is banked at a 13.0^circ angle. What is the maximum speed with which a 1400 kg rubber-tired car can take this curve without sliding? (Take the static coefficient of friction of rubber on concrete to be 1.0.)