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]
16.46 Two spherical, non18 .j+r85zbymfb m gy o(6nmrb-ryr e0f1tzgex56 *li3c otating planets, X and Y, have the same uniform density. Planet X has twice the radius or3*glixec 1e6f 5z0yt f Planet Y. Let $v_x$ and $v_y$ represent the escape speed at the surfaces of Planet X and Planet Y, respectively. What is the ratio of $v_x:v_y$?
A. 2:1
B. 1:2
C. 1:1
D. 4:1
E. 1:4
参考答案: A
本题详细解析:
暂无
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