posted by Erica--help! on .
An aluminum rod is 21.5 cm long at 20°C and has a mass of 350 g. If 12500 J of energy is added to the rod by heat, what is the change in length of the rod?
first find the change in temp
look up specificheat for al, compute delta temp
then, go to linear expansion.
look up the linear expansion coeff, compute change in length.