Multiple Choice
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 R 0 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
= 90 o when the sun is in the east and
= 0 o when the sun is in the south. What percentage of R 0 is striking the wall when
is equal to 30 o and the sun is in the southeast?
Round the answer to the nearest integer.
A) 71 %
B) 61 %
C) 56 %
D) 76 %
E) 29 %
Correct Answer:

Verified
Correct Answer:
Verified
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