The mean electrical power output of a community micro-hydroelectric generator is 1.8 MW1.8\text{ MW}1.8 MW, which is distributed equally among 150015001500 smart-homes in an eco-village.
Calculate the mean power supplied to each smart-home. Give your answer in watts (W\text{W}W).
Some of the kinetic energy of the flowing water is dissipated as thermal energy due to fluid friction against the pipe walls (penstock) and mechanical friction in the turbine bearings. The interior walls of the penstock are treated with a hydrophobic, ultra-smooth polymer coating. Explain how applying this coating affects the efficiency of the hydroelectric generator.
26 exam-style questions on AQA GCSE Physics 1.2 Conservation and dissipation of energy, covering 1.2.1 Energy transfers in a system and 1.2.2 Efficiency. Each one has a worked solution and a mark scheme showing where the marks go.