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Expansion and contraction
Lower Sec Science · Secondary 2 · Hard · Expansion and contraction
A metal lid is tightly stuck on a glass jar. To open it more easily, a student runs hot water over the metal lid for a short time.
Why does this help to open the jar?
Why does this help to open the jar?
- The metal lid contracts more than the glass jar when heated.
- The metal lid expands more than the glass jar when heated.
- The glass jar expands more than the metal lid when heated.
- Both lid and jar contract when heated, loosening the lid.
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