A metal ball could just pass through a metal ring. After heating the ball over a flame for two minutes, it could no longer pass through the ring. Why?
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Worked Solution
Step 1: Heating a solid causes its particles to move further apart.
Step 2: This results in an increase in volume (expansion).
Step 3: The ball became larger and could no longer fit through the same-sized ring.
Correct answer: The ball expanded in volume.
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