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 t):f:9vksqi hqse( 7iorbits a star with mass one-half the h .;caf( z mv- 1b7v,dd2x( yannoxfs9mass of our sun. The planet’s orbital radius is the same as the Earth’s. Approximately how many Earth years does it takef yz d v((xa7o2vdmax9;nhcb .n 1s,-f for 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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