本题目来源于试卷: Physics Unit5: Circular Motion & Gravitation，类别为 国际高中通用物理
[单选题]
Two moons orbit a planet in nearly circular orbits. M2-wxy5 5s7qnz,1,bdgdb opseniag5 ( oon A has orbh.gf )svzy(72lz ytz: ital radius r, and moon B has orbital radius 4r. Moon A takes 20 days to 7)hyyzs f :g(t.2v lzzcomplete one orbit. How long does it take moon B to complete an orbit?
A. $20 \; days$
B. $80 \; days$
C. $160 \; days$
D. $320 \; days$
参考答案: C
本题详细解析:
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