A piece of copper of mass 120g is heated in an enclosure to a temperature of 1250C. It is then taken and held in the air for 30 seconds and dropped carefully into a copper calorimeter of mass 105g containing 200g of water at 200C. The temperature of the water rises to 250C. Calculate the rate at which heat is being lost from the copper when it is held in the air. [Specific heat capacity of copper = 400 JKg-1K-1, Specific capacity of
