Iron, lead and brass spheres of equal masses are heated to a common temperature and are kept on a sheet of wax. The sphere that passes through the plate first is (lead 0.03 cal/g/°C, iron 0.11 cal/g/°C, brass 0.08 cal/g/ºC)

Rate of melting of sheet will be same in all three cases as it only depends on surface Area which is same for all three spheres. Hence all three spheres will pass through the wax sheet at the same time because is independent of the specific heat capacity and depend on surface area.