Two identical artificial satellites, 1 and 2, orbit the Earth in circular orbits having radii R1 and R2, respectively, as shown in the figure. If R2 = 3R1, the centripetal accelerations az and a, of the two satellites are related by which of the following? R2 2
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A. a2=a1/3
B. a2=3a1
C. a2=a1/9
D. a2=a1
E. a2=9a1
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