Why a glass tumbler break ehen hot liquid pour in it..Give reason?
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⭐when you pour a very hot liquid into a thick tumbler what happens is, the surface of glass that comes in contact with the hot liquid heats up and expands as per its coefficient of thermal expansion, while the outer layer still remain cold and does not expands (because glass is a poor conductor and does not carry heat .
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Answer: Glass is a very bad conductor of heat. So when hot liquid is poured in the glass tumbler the inner surface undergoes expansion but the outer surface remains unchanged. Hence, due to this uneven expansion a glass tumbler breaks when hot liquid is poured in it.
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