The suns intensity at the distance of the earth is 1370 W/m 2 . 30% of this
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The sun’s intensity at the distance of the earth is 1370 W/m2.
30% of this energy is reflected by water and clouds; 70% is absorbed. What would be the earth’s average temperature (in °C) if the earth had no atmosphere? The emissivity of the surface is very close to 1. (The actual average temperature of the earth, about 15°C, is higher than your calculation because of the greenhouse effect.)
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Physics for Scientists and Engineers A Strategic Approach with Modern Physics
ISBN: 978-0133942651
4th edition
Authors: Randall D. Knight
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