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When glass stopper in a bottle is stuck it may sometimes be loosened by holding the neck of the bottle under a hot water faucet explain the physical principle responsible for this observed phenomenon?
Wiki User
∙ 10y ago
With a few exceptions (notably melting ice) objects expand when heated. If you run hot water on a bottle neck, the heat is applied directly to the bottle and only indirectly to the stopper inside the bottle, so the bottle heats first, and thereby expands sooner than the stopper does. An expanded bottle will exert less pressure on the stopper.
Wiki User
∙ 10y ago
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