At the Earth's Surface, the Intensity of Solar Radiation Is

At the Earth's surface, the intensity of solar radiation is approximately 1000 W/m². At a latitude of 44.5 degrees north, when the Sun is highest in the sky on the winter solstice, the Sun's rays are incident at an angle of 68.0 degrees from the vertical. What power is incident upon a 1.00 m × 1.50 m window in a vertical, south-facing wall at this time?

A) 1390 W
B) 927 W
C) 562 W
D) 375 W

Correct Answer:

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