Physics · Oct / Nov 2021 · Paper 12 · Question 18

Solar panels are used to heat water with a mass of 500 kg. The total area of the solar panels is 10 m² and the average power output from each square metre of the panels is 300 W. The specific heat capacity of water is 4200 J / (kg °C). What is the increase in the water temperature after 8.0 hours? (Assume there is no heat loss.)

1. A0.69 °C
2. B4.1 °C
3. C5.1 °C
4. D41 °C

As printed in the paper