Physics 0625 · IGCSE · Transfer of thermal energy

Transfer of thermal energy — practice question

Two metal cans are the same apart from their outer surfaces: one is shiny silver and the other is dull black. Each one contains the same mass of hot water, sealed in at the same temperature. Both cans are placed in a vacuum in the darkness of outer space. What happens to the temperature of the water in each can?

  • AThe temperature of the water does not change.
  • BThe water in the black can cools more slowly than that in the silver can.
  • CThe water in the silver can cools more slowly than that in the black can.
  • DThey both cool down at the same rate.

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