A good friend of mine came to visit me today at my apartment. We started taking the dishes out of the dishwasher just as it finished washing, so the plates were still warm. She wanted something to drink, so she poured herself lemonade with ice. As she poured the the cold drink, the glass cracked. This is because of the "Thermal Downshock". When the colder water hits the hot surface, the now cooled surface shrinks in comparison to the warmer layer of glass that is inside. The tension that results from this causes the glass to break or crack.
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