Question 20A piece of metal of mass 50g is cooled from 80oC to 20oC. Calculate the amount of heat lost. (specific heat capacity of the material of metal = 450Jkg-1K-1)A.4.50 x 103JB.2.25 x 103JC.1.80 x 103JD.1.35 x 103JObjective Show full explanation