(a)[2]
State the law of conservation of energy.
(b(i))[1]
Define the unit kWh.
(b(ii))[2]
Calculate the energy output of the wind turbine when it operates at maximum power for 4.0 h. Give your answer in kWh.
(c)[2]
Radiation from the Sun is the primary source of energy for most of our energy resources. State two energy resources that are not caused by radiation from the Sun.