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1. |
The observed solar constant S0, the true solar constant S and the angular elevation Z of the sun are related by the expression |
A. | S0 =S a SEC Z |
B. | S0 =2 S a SEC Z |
C. | S0 =3 S a SEC Z |
D. | S0 =4 S a SEC Z |
Answer» B. S0 =2 S a SEC Z | |