本题目来源于试卷: Physics Unit5: Circular Motion & Gravitation，类别为 通用国际物理
[单选题]
Two moons orbit a planet in neaxb3o c ci)k53mh 6y5 xcs5sf)krly circular orbits. Moon A has orbital radius alzfv6 zi8t0k27jsm;r, and moon B has orbital radius 4r. jz vat8zlsf 0km2i; 67Moon A takes 20 days to complete 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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