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2.3.4 Consequences of thermal energy transfer

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Question 3

Two samples, A and B, of the same metal have the same mass but different shapes:

  • Sample A is a thin flat plate (large surface area).
  • Sample B is a solid sphere (small surface area).

Each sample is heated in an oven to 120∘C120^\circ\text{C}120∘C and then placed on a heat-resistant surface in a room at 20∘C20^\circ\text{C}20∘C to cool down to room temperature.

Which row in the table correctly compares the total thermal energy transferred to the surroundings and the initial rate of cooling for each sample?

RowTotal thermal energy transferredInitial rate of cooling
ASample A transfers more energy than BSample A cools down faster than B
BSample B transfers more energy than ASample B cools down faster than A
CBoth samples transfer the same energySample B cools down faster than A
DBoth samples transfer the same energySample A cools down faster than B
A

Row A

B

Row B

C

Row C

D

Row D

Markscheme

2.3.4 Consequences of thermal energy transfer Questions

  1. IGCSE
  2. /Physics
  3. /2.3.4 Consequences of thermal energy transfer

62 exam-style questions on CIE IGCSE Physics 2.3.4 Consequences of thermal energy transfer. Each one has a worked solution and a mark scheme showing where the marks go.

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