Physics · May / June 2023 · Paper 12 · Question 18
5054Convection
Which statement describes the transfer of thermal energy in a liquid by convection?
- AA decrease in its density causes the heated liquid to rise.
- BFree electrons carry energy large distances through the liquid.
- CInfrared radiation passes through the liquid and transfers energy.
- DParticles of the liquid vibrate and pass energy to neighbouring particles.
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Correct answer: A. A decrease in its density causes the heated liquid to rise.
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