thermal expansion


a: Thermal expansion ~
b: heating a metal lid on a container


Sometime it's difficult to remove a lid from a jar. If you run hot water over a metal lid and then dry the lid, it becomes much easier to remove. The hot water is expanding the metal lid making giving it a looser fit, which makes it easier to turn and thus remove.

Writer: Lucrezia
Where: Reference Link Has Evaporated
Date: Dec 8 2014 4:29 PM

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