Fields D.1 Gravitational Fields & Potential (id: a3bc9e9e5)

本题目来源于试卷: Fields D.1 Gravitational Fields & Potential ，类别为 IB物理学

[单选题]
Planet $A$ has a gravitational field strength $g$ at its surface. Planet $B$ has twice the density and twice the radius of planet $A$.
What is the gravitational field strength at the surface of $B$?

A. $g$
B. $2g$
C. $4g$
D. $8g$


参考答案:  C


本题详细解析:

微信扫一扫，分享更方便