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We know that an ordinary glass tumbler can crack if very hot or very cold water is poured into it .You have two glass tumblers made of ordinary glass - one

with thick walls and the other with very thin walls.Which one is more likely to crack when very hot or very cold water is poured into them ?


The glass with thicker walls is more likely to crack.

This is because when glass is thick and very hot or cold water is poured into it, the inner surface of glass expands or contracts more rapidly than the outer surface. This difference causes the thicker glass to break more easily.
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