Consider the electrical heater of Problem 7.49. If the blower were to malfunction, terminating airflow while the heater continued to operate at 1000 W/m, what tem- perature would the heater assume? How long would it take to come within 10°C of this temperature? Allow for radiation exchange between the heater (s = 0.8) and the duct walls, which are also at 27°C.