本题目来源于试卷: Gravity and Planetary Motion，类别为 美国物理杯赛(Physics Bowl)
[单选题]
94.34: A hypothetical planet orbits a star with mass y1 e 4b2yk)fpx0u tot1xejl-;one-half the mass of ouduhsna5s 0) ck v9zb.1r sun. The planet’s orbital radius is the same as the Earth’s. Approximately how many Earth years does it take for the planet to complete onen0kz s.)suvd5b9 hc a1 orbit?
A. 1/2
B. $\frac{1}{\sqrt{2}}$
C. 1
D. $\sqrt{2}$
E. 2
参考答案: D
本题详细解析:
暂无
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