A thick glass tumbler often cracks when boiling water is poured into i

1.	A thick glass tumbler often cracks when boiling water is poured into it.why?
Answer» When you PUT the water in the THICK glass. thermal conductivity of Glass is very LESS so the expansion of inner wall is more and Outer wall is less. That's why it break

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A thick glass tumbler often cracks when boiling water is poured into it.why?

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