Three rods have the same size and shape, but each one is made from a different material. A pin is fixed to one end of every rod with wax, and the wax softens when heated. The rods rest on a wooden block and are heated equally with a Bunsen burner, as shown in Fig. 6.1.
(a(i))[1]
State the process by which thermal energy moves through the rods.
(a(ii))[2]
Explain how Fig. 6.1 can be used to find which rod transfers thermal energy most rapidly.
(b(i))[1]
State the process by which infrared waves transfer thermal energy.
(b(ii))[1]
State the process of thermal energy transfer that does not need a medium.
(c)[2]
The shiny foil on the wall increases the efficiency of the heater. Explain how the shiny foil increases the efficiency of the heater.
Worked solution & mark scheme
This 7-mark question has a full step-by-step worked solution and mark scheme. One marking point: “conduction” …