本题目来源于试卷: Physics Unit16: Electric Charge and Electric Field，类别为 国际高中通用物理
[单选题]
A copper penny has a mass of 3.0 g. A td7(i ,s *. wfhukaea)6j-:hl8 flpnv wotar95e7fkd-fh /uua i* yl of $4.0 \times 10^{12} \; electrons$ are transferred from one neutral penny to another. If the electrostatic force of attraction between the pennies is equal to the weight of a penny, what is the separation between them?
A. $31 \; cm$
B. $33 \; cm$
C. $35 \; cm$
D. $37 \; cm$
参考答案: C
本题详细解析:
暂无
| 
