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heat expansion

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Scholar
Karma Points: 200
Respect (100%):
Date Posted: 4/11/2008 1:35:04 AM  Status: Closed
heat expansion
Course Textbook Chapter Problem
Algebra Based Physics Conceptual Physics (10th) by Hewitt N/A N/A
Question Details:

Is their a substane that doesn't expand when heated?

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Oracle
Karma Points: 15,316
Date Posted: 4/11/2008 1:40:27 AM  Status: Live
Asker's Rating: Helpful   
Response:
In general, the answer would be no.
 
Substances expand when heated, and very large forces may be setup if there is an obstruction to the free movement of the expanding or contracting bodies. Even through the expansion of solids are not visible, it can produce enough force to crack concrete or buckle steel. And it all happen because vibrating molecules need room to move. When water changes into ice, its volume is increased by 9% which is why water pipes burst if they freezes up.
-Solids don't expand much when heated, but the force produced by the expansion can be very high. Concrete and steel beams used in construction work can cause considerable damage if they do not have space to expand when the temperature rises.
Neo Kage's Comment:
thanks

Hope this helps!  Please take the time to rate my answer accordingly.  Thanks! 

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Scholar
Karma Points: 200
Date Posted: 4/11/2008 1:43:56 AM  Status: Live
Asker's Rating: N/A-Posted by Person Asking Question   
Response:
I'm confused. On a homework assignment, the question states to give the exception.
Does that make any sense ?



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