The immersed object shown in Figure 8.1.2e is steel and has a mass of 100 kg and a specific heat of cp = 500 J/kg. oC. Assume the thermal resistance is R = 0.09°C. s/J. The initial temperature of the object is 20° when it is dropped into a large bath of temperature 80oC. Obtain the expression for the temperature T(t) of the object after it is dropped into the bath.