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Water Glasses

Science brain teasers require understanding of the physical or biological world and the laws that govern it.

 

Puzzle ID:#2842
Fun:*** (2.71)
Difficulty:** (1.47)
Category:Science
Submitted By:204_BlaZe_41****
Corrected By:Jake

 

 

 



If boiling water is poured into a thick drinking glass as well as a very thin wine glass, of the two, which is more likely to crack? Explain.


Answer

Surprisingly enough, the thick glass is more likely to crack since glass is a poor conductor of heat. In a thin glass, the heat passes more quickly from the glass into the surrounding air, causing the glass to expand equally. When hot water is poured into a thick glass, the inner surface expands, but the outer surface does not. It is this extreme stress on the glass that causes it to crack.
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