(a(i))[1]
State the meaning of the term renewable energy source.
(a(ii))[1]
State the name of one further renewable energy source.
(b(i))[1]
From Fig. 4.1, calculate the percentage of energy lost to thermal and kinetic energy stores.
(b(ii))[1]
Using Fig. 4.1, calculate the percentage of energy converted into electrical working.
(c)[2]
Electrical power is also produced from water stored behind hydroelectric dams. State two disadvantages of producing electricity from the water behind hydroelectric dams compared with using the energy store in nuclear fuels. Ignore construction and maintenance costs.