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Furnace device

by jimbo71
Tags: device, furnace
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jimbo71
#1
Dec6-08, 12:06 PM
P: 81
1. The problem statement, all variables and given/known data
see attachment


2. Relevant equations



3. The attempt at a solution
I do not understand the diagram.
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8.jpg  
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Redbelly98
#2
Dec7-08, 07:30 AM
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The two lines labelled AB are actually strips of two different metals, attached to each other (usally be welding them together, I think)

When the temperature changes, the metal strips curve or bend to the right and touch the thing in the upper right of the figure.
jimbo71
#3
Dec8-08, 11:39 AM
P: 81
So, they expand and contract which is determined by the temperature from the heat given off from the furnace. Why are two different metals used?

mgb_phys
#4
Dec8-08, 11:41 AM
Sci Advisor
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P: 8,953
Furnace device

They expand different amounts with temperature and so bend - the bending amplifies the very small change in length.


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