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?