The room shown in Figure 7.34 has a heater with heat flow rate input of q0. The thermal capacitances of the heater and the room air are C1 and C2, respectively. The thermal resistances of the heater–air interface and the room wall–ambient air interface are Rand R2, respectively. The temperatures of the heater and the room air are T1 and T2, respectively. The temperature outside the room is T0, which is assumed to be constant.

a. Derive the differential equations relating the temperatures T1T2, the input q0, and the outside temperature T0.

b. Using the differential equations obtained in Part (a), determine the state-space form of the system. Assume the temperatures T1 and T2 as the outputs.