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1.2 Conservation and dissipation of energy

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Question 13

A canteen keeps hot food in two identical trays. Each tray contains the same mass of the same food at the same starting temperature. One tray is covered with lid P and the other with lid Q. The lids are the same size and thickness. Lid P is made from a material with a low thermal conductivity. Lid Q is made from a material with a high thermal conductivity. Both trays are left in the same room. Which lid should the canteen choose to keep the food warm for longer?

[1]
A

Lid P, because its material transfers energy by conduction at a higher rate.

B

Lid P, because its material transfers energy by conduction at a lower rate.

C

Lid Q, because its material transfers energy by conduction at a higher rate.

D

Lid Q, because its material transfers energy by conduction at a lower rate.

Markscheme

1.2 Conservation and dissipation of energy Questions

  1. GCSE
  2. /Physics
  3. /1.2 Conservation and dissipation of energy

104 exam-style questions on AQA GCSE Physics 1.2 Conservation and dissipation of energy, covering 1.2.1 Energy transfers in a system and 1.2.2 Efficiency. Each one has a worked solution and a mark scheme showing where the marks go.

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