Question

why does a tightly fixed lid of a bottle come loose when kept under hot water​

Answer 1

Answer:

beacaue when any object is heated it expands while on cooling object contacts.

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Answer 2

Explanation:

Opening a tightly sealed pickle-jar can be tricky. There is a logical Physics explanation why running it under hot water can make it easier to open. If we assume it is your average glass pickle-jar with a metal top than heating up the jar will loosen the lid because the metal conducts more heat than the glass.