Thermal expansion of an aluminum bar

1. Dec 1, 2011

austindubose

1. The problem statement, all variables and given/known data
Consider a bar of aluminum which is 10 cm X ½ m X 20 m. If the bar undergoes a change in its temperature from 10° C to 20° C, determine the new dimensions of the bar.

2. Relevant equations
ΔL=αL0ΔT
α=24x10-6

3. The attempt at a solution
I understand how the formula works and everything. But my real question is as follows: does thermal expansion occur in all dimensions? Would each dimension increase?

2. Dec 1, 2011

technician

I don't understand your dimensions of the bar !!!! and yes.... the bar expands in all directions. each height will get higher each width will get wider and each length will get longer

Last edited: Dec 1, 2011