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RACTICE IT se the worked example above to help you solve this problem. Assume that the Sun delivers an average power per unit area of about 1000 W/m2 to Earths surface. (a) Calculate the total power incident on a flat tin roof 7.66 m by 23.4 m. Assume that the radiation is incident nomal (perpendicular) to the roof 179244 (b) The tin roof reflects some light, and convection, conduction and radiation transport the rest of the thermal energy away, until some equilibrium temperature is established. If the roof is a perfect blackbody and rids itself of one-half of the incident radiation through thermal radiation, whats its equilibrium temperature? Assume the ambient temperature is 294 K. 523.5 Your response differs from the correct answer by more than 100%.°C
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