O-LevelPhysicsThermal Physics5054/11 · May/June 2015 · Q151 Mark
A solid bar is heated at one end. How is thermal energy transferred to the other end of the bar?
AHeated molecules move along the bar, carrying energy to the other end.
BHeated molecules move along the bar, giving energy to others along the bar.
CHeated molecules stay completely still, but give energy to other molecules.
DHeated molecules vibrate more rapidly and pass energy to other molecules.
✓ Correct answer
D: Heated molecules vibrate more rapidly and pass energy to other molecules.
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