An engineer creates a device that takes in thermal energy from the Sun and uses it to warm water. Within the device, cold water moves slowly from an upper tank, along a white plastic pipe, to a lower tank. As it travels, energy from the Sun heats the water, as shown in Fig. 5.1. Fig. 5.1 includes the labels: upper tank, cold water, white plastic pipe, lower tank, warm water, Sun.
(a)[1]
State the instrument used to measure temperature.
(b(i))[1]
State the process that transfers thermal energy from the Sun to the white plastic pipe.
(b(ii))[1]
State the process that transfers thermal energy through the pipe’s plastic wall into the water inside the pipe.
(c)[4]
Suggest two changes he could make to increase the thermal energy absorbed. For each one, explain why your suggestion raises the thermal energy absorbed.
Worked solution & mark scheme
This 7-mark question has a full step-by-step worked solution and mark scheme. One marking point: “a thermometer” …