A block of tissue of 1 x 10-6 m3 consists of a constant heat input of 19 mW, loses heat at a constant rate of 10 mW through a combination of heat transfer modes, and as it is still metabolically active, produces heat internally at a constant rate of 1 mW. When the density of the tissue is 1000 kg/m3 and its heat capacity is 3600 J/(kg C), determine the time rate of change of its temperature? Employ a non-steady state energy balance on the block, and treat it as a control volume. Suppose that at any instant of time, temperature of the block is uniform all through.