Fields D.1 Gravitational Fields & Potential (id: 572878043)

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

[单选题]
A proton and another object with charge +e exert electrical and gravitational forces on one another. To the nearest order of magnitude, what mass must the object have to be so that the net force acting on it is zero?

A. $10^1$
B. $10^3$
C. $10^6$
D. $10^9$


参考答案:  D


本题详细解析:

微信扫一扫，分享更方便