An airplane flies 120 km at a constant altitude in a direction 30.0° north of east. A wind is blowing that results in a net horizontal force on the plane due to the air of 2.40 kN in a direction 10.0° south of west
How much work is done by the air on the plane? A)
-2.70 × 108 J
B)
-0.985 × 108 J
C)
-221 × 108 J
D)
221 × 108 J
E)
0.821 × 108 J
A
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A. 1,502 Hz. B. 1,837 Hz. C. 2,237 Hz. D. 2,568 Hz. E. 3,250 Hz.
Glass in a florist's greenhouse acts as a one-way valve in that it
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