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Expansion and contraction
Lower Sec Science · Secondary 2 · Hard · Expansion and contraction
A metal lid is stuck on a glass jar. Warm water is poured over the lid only. Which statement explains why this helps to open the jar?
- The metal lid expands more than the glass, so it becomes slightly looser.
- The glass jar expands more than the lid, tightening the lid.
- Both lid and jar contract, so the lid becomes loose.
- The warm water dissolves the metal, so the lid falls off.
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