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Q.

Is it true that a thick glass tumbler cracks when boiling hot water is poured into it?


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a

True

b

False  

answer is A.

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Detailed Solution

Yes, the given statement is correct. When boiling water is poured into a thick glass, its inner surface expands. However, due to the low thermal conductivity of glass, the expansion of the outer surface of the glass is relatively small. Uneven stretching of the outer and inner surfaces will break the tumbler.
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