In the construction of a space platform, two equally sized structural members with surfaces that may be considered black are placed relative to each other as shown schematically below. Assuming that the left member attached to the platform is at 500 K while the other is at 400 K and that the surroundings may be treated as though black at 0 K, calculate (a) the rate at which the warmer surface must be heated to maintain its temperature, (b) the rate of heat loss from the cooler surface to the surroundings, (c) the net rate of heat loss to the surroundings for both members.GIVENTwo black surfaces as shown above on a space platformASSUMPTIONSSteady stateThe surroundings behave as a blackbody enclosure at Ts = 0 KThe plate also lose heat from their backsurface

4m Az At T2=400 K T = 500 K 1m- H m-