Text can be resized with your browser. Refer to the original figures below for diagrams and their layout.
Fig. 4.1 shows a power station that uses thermal energy from deep underground. Name this energy resource.
One type of renewable energy source is shown in Fig. 4.1.
State the name of the renewable energy source shown in Fig. 4.1.
1000 kg of cold water at a temperature of 20 °C is pumped down to the hot rocks.
The water returns partly as steam and partly as hot water.
The steam and the hot water are both at a temperature of 100 °C.
The specific heat capacity of water is 4200 J / (kg °C).
Calculate the energy needed to heat 1000 kg of water from 20 °C to 100 °C.
energy = ...................................... J
Explain why more energy is transferred when 1 kg of the steam cools to 20 °C than when 1 kg of the hot water cools to 20 °C.
You should include a reference to the arrangement of particles in liquids and in gases in your answer.
5054/02/SP/23Cambridge O Level Physics 5054 · Specimen 2023 · Paper 2 · Question 4