4. Sam took out porridge kept in a glass bowl from the refrigerator. As he wanted it hot, he put out it directly into the microwave oven for heating. To his surprise the glass bowl cracked !! Can you help him figure out why this had happened?
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As long as the container is stationary, the heat will slowly transfer from one location in the container to another. But when you pick it up, it "sloshes", causing the cold salsa to move to where the glass container is hot - and, as VeryLittle explained, that can cause the POP.
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