1. At what net rate does heat radiate from a 175- m² black roof on a night when the roof's temperature is 30°C and the s

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1 At What Net Rate Does Heat Radiate From A 175 M Black Roof On A Night When The Roof S Temperature Is 30 C And The S 1 (70.31 KiB) Viewed 18 times

1. At what net rate does heat radiate from a 175- m² black roof on a night when the roof's temperature is 30°C and the surrounding temperature is 15°C? The emissivity of the roof is 0.900. The Stefan-Boltzmann's constant is o=5.67 × 10-8 J/(s m² K4). Hint: The roof radiates heat to the surroundings but also absorbs heat from the surroundings. Use the sign convention for heat leaving and entering a system. Pnet=Q/t=13663.81 X√ W