Physics 0625 · IGCSE · Transfer of thermal energy

Transfer of thermal energy — practice question

A metal cup is lined with plastic. Hot water is poured into the cup, and a hand is used to hold it. Which statement about how thermal energy is transferred from the water to the hand is correct?

  • AIn the plastic, no energy is transferred directly between adjacent molecules.
  • BIn the plastic, fast moving molecules interact with free electrons, making the electrons move very quickly.
  • CIn the metal, energy is transferred only by electrons.
  • DIn the metal, energy is transferred by electrons and by vibrations of the lattice.

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