Hot Glass
Posted in Arts and Crafts on 11/21/2009 02:54 pm by adminHot Glass
why do a glass tumbler break break if hot tea is poured to it?
Materials expand when heated and contract when cooled. When the hot liquid hits the cold glass the inside of the glass gets hot faster than the outside of the glass. so the inside expands and the outside does not expand. since glass is rigid it does not flex but cracks or breaks. This can also break a car windshield if you try and defrost it with hot water. The larger the temperature difference the more likely the glass is to break.
If the glass was hot when the hot liquid was poured in it would not break.
You answered your own question. Give yourself 10 points.
Hot Glass Tutorial/ Creating a Head and Face
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