(a)[1]
State the name of the type of energy stored in the oil before it is burnt.
(b(i))[1]
State and explain whether oil is a renewable or a non-renewable energy source.
(b(ii))[1]
Describe one environmental problem caused by burning oil to generate electricity in a power station.
(c(i))[1]
State what is meant by efficiency.
(c(ii)-1)[2]
The efficiency of the power station is $0.38$ (38%). Its electrical power output is $1.9 \times 10^{9}\,\text{W}$. Calculate the input power to the power station.
(c(ii)-2)[2]
Calculate the energy wasted in $2.0$ hours.