Air at a static temperature of 21°C and a static pressure of 0.7 kPa (abs) flows at zero angle of attack over a thin, electrically heated flat plate at a velocity of 240 m/s. If the plate is 10 cm long in the direction of flow and 60 cm in the direction normal to the flow, determine the rate of electrical heat dissipation necessary to maintain the plate at an average temperature of 55°C.