1. The problem statement, all variables and given/known data when a metal cylinder of mass 0.02kg and specific heat capacity 500J/kg/K is heated by an electric heater working at a constant power, the initial rate of rise of temperature is 3K/min. After a time the heater is switched off and the initial rate of fall of temperature is 0.3K/min. what is the rate at which the cylinder gains heat energy immediately before the heater is switched off? ans 0.45w 2. Relevant equations Q=mc(dT) 3. The attempt at a solution heat gained per second Q=0.02x500x3/60=0.5W Q=0.02x500x0.3/60=0.05W 0.5-0.05=0.45W i did this just tried but didnt get the concept of the questions...and not even sure if the method is correct! could someone please elaborate the qn to me!