The intensity of sunlight falling on the earth is about 1.4 kW/m2 (before any gets absorbed by our atmosphere). At what rate does the sun emit light energy?
(The earth-sun distance = 1.5 × 108 km and the earth's radius = 6.4 × 103 km.)
A) 4.0 × 1026 W
B) 3.2 × 1022 W
C) 7.2 × 1014 W
D) 7.6 × 108 W
Answer: A
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The Moon's spin-orbit resonance shows it is ________ with the Earth
Fill in the blank(s) with correct word
What magnitude net force is required to accelerate a 1200-kg car uniformly from 0 m/s to 27.0 m/s in 10.0 s?
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A baseball is hit at ground level. The ball is observed to reach its maximum height above ground level 3.0 s after being hit. And 2.5 s after reaching this maximum height, the ball is observed to barely clear a fence that is 97.5 m from where it was hit. How high is the fence?
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