Fig. 4.1 depicts two metal containers, A and B. Container A has a dull black outer surface, while container B has a shiny white outer surface. At time = 0, both A and B contain very hot water. The water temperature in each container is measured every minute.
(a(i))[2]
State which container has the greater temperature change during the first 5 minutes. Explain why.
(a(ii))[1]
Once 30 minutes have passed, the water in container A stays at a steady temperature. State, in terms of energy transfers, why the temperature stays steady.
(a(iii))[1]
The experiment is carried out again with the lids taken off the containers. State the name of the extra method of energy transfer that takes place.
(b)[3]
Explain why the rate of energy transfer through the metal is much greater than the rate through the wood.
Worked solution & mark scheme
This 7-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Container A or the container with the dull black surface AND dull black surfaces emit infrared radiation more effectively” …