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 hypotheticafdh8-kzasq1 kn3-4x:m)eve d()d hosl planet :f tke;;uhrk1orbits a star with mass one-half the mass of our sun. Ther:;1kkh t;u fe planet’s orbital radius is the same as the Earth’s. Approximately how many Earth years does it take 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
| 
