A 100-kg steel support rod in a building has a length of 2.0 m at a temperature of 20oC. The rod supports a hanging load of 6,000 kg. Determine
1) The work done on the rod as the temperature increases to 40oC.
2) The energy Q added to the rod (assuming the specific heat of steel is the same as that for iron), and
3) The change in internal energy of the rod.