本题目来源于试卷: .Gravity..，类别为 美国物理杯赛(Physics Bowl)
[单选题]
94.34: A hypothetical planet orbits a star with mass onm6( *i.gsx,sn/bj bhm e-half the mass m ;;ajja,j2xq of our sun. The planet’s orbital radius is the same as the Earth’s. Approximately how many Earth years does it take f m2;,ax q;ajjjor the planet to complete one 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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