Two planets orbit a star. You can ignore the gravitational interactions between the planets. Planet 1 has orbital radius r1 and planet 2 has r2 = 4r1 . Planet 1 orbits with period T1 . Planet 2 orbits with periodA. T2 = (1)/(2)T1         B. T2 = 2T1           C. T2 = 4T1          D. T2 = 8T1

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Chapter13: Gravitation
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Problem 37P: Two planets in circular orbits around a star have speed of v and 2v . (a) What is the ratio of the...
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Two planets orbit a star. You can ignore the gravitational interactions between the planets. Planet 1 has orbital radius r1 and planet 2 has r2 = 4r1 . Planet 1 orbits with period T1 . Planet 2 orbits with period
A. T2 = (1)/(2)T1         B. T2 = 2T1           C. T2 = 4T1          D. T2 = 8T1

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