
Grade 11General Physics
A roof measures 20 m by 50 m and is blackened. If the temperature of the sun?s surface is 6000 K, and the radius of the sun is 7.5?108 m. The distance of the sun from the earth is 1.5?108 km. Calculate how much solar energy is incident on the roof per minute, assuming that half is lost in passing through the earth?s atmosphere. Assume the roof is normal to the sun?s rays.
A roof measures 20 m by 50 m and is blackened. If the temperature of the sun?s surface is 6000 K, and the radius of the sun is 7.5?108 m. The distance of the sun from the earth is 1.5?108 km. Calculate how much solar energy is incident on the roof per minute, assuming that half is lost in passing through the earth?s atmosphere. Assume the roof is normal to the sun?s rays.




