O-LevelPhysicsThermal Physics5054/11 · May/June 2023 · Q171 Mark
A cold solid is placed on top of a hot solid. Thermal energy is transferred from the hot solid to the cold one. What is the explanation for this?
Ahot solid expands, so its particles will move further apart.
BEnergy is transferred from one particle to the next.
CHeat always rises.
DMolecules are free to move randomly through the solids.
✓ Correct answer
B: Energy is transferred from one particle to the next.
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