Physics 0625 · IGCSE · Transfer of thermal energy

Transfer of thermal energy — practice question

A piece of wire gauze traps the ice at the bottom of a tube containing water. The water at the top of the tube reaches boiling point before the ice at the bottom melts. Why does this occur?

  • AConvection currents are circulating throughout the water.
  • BIce is a poor emitter of thermal energy.
  • CWater is a poor conductor of thermal energy.
  • DWire gauze is a good conductor of thermal energy.

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