Problem

A 3-m2 black surface at 140°C is losing heat to the surrounding air at 35°C by convection...

A 3-m2 black surface at 140°C is losing heat to the surrounding air at 35°C by convection with a heat transfer coefficient of 16 W/m2•°C, and by radiation to the surrounding surfaces at 15°C. The total rate of heat loss from the surface is

(a) 5105 W

(b) 2940 W

(c) 3779 W

(d) 8819 W

(e) 5040 W

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A 3-m2 black surface at 140°C is losing heat to the surrounding air at 35°C by convection...

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