The amount of sunshine illuminating a wall of a building
Chapter 6, Problem 41(choose chapter or problem)
The amount of sunshine illuminating a wall of a building can greatly affect the energy efficiency of the building. The solar radiation striking a vertical wall that faces east is given by the formula where is the maximum solar radiation possible, is the angle that the sun makes with the horizontal, and is the direction of the sun in the sky, with when the sun is in the east and when the sun is in the south. (a) When does the maximum solar radiation strike the wall? (b) What percentage of is striking the wall when is equal to 60 and the sun is in the southeast?
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