1. The problem statement, all variables and given/known data Question: If the linear expansivity of aluminium is 24 x 10-6 K-1, how much does the aluminium expand during the heating? 2. Relevant equations As far as additional information on the question goes; An aluminium rod is heated from 15 degrees Celsius to 120 degrees Celsius. The dimensions of the aluminium rod are 12mm (diameter) x 1.2m long. The density of aluminium is 2700 kg per meters cubed. 3. The attempt at a solution So far I'm completely stumped, we may have covered it but I literally cannot work it out.