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Question: 5 the roof of a car in a parking lot...

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5 The roof of a car in a parking lot absorbs a solar radiant flux of 800 W/m2 and the underside is perfectly insulated. The convection coefficient between the roof and the ambient air is 12 W/m2.K. (a) Neglecting radiation exchange with the surroundings, calculate the temperature of the roof under steady state conditions if the ambient air temperature is 20°C. (b) For the same ambient air temperature, calculate the temperature of the roof if its surface emissivity is 0.8.
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