当前位置: > 1.How many electrons have removed from a positively charged pith-ball electroscope if it has a charg...
题目
1.How many electrons have removed from a positively charged pith-ball electroscope if it has a charge of 7.5×10^-11C?
2.What is the charge in coulombs on an object that has
(1)An excess of 6.25×10^19 electrons?
(2)An deficiency of 1.0×10^8 electrons?

提问时间:2021-02-14

答案
1.一个电子电荷e=-1.6*10^-19C 验电器上移走的电子数=Q/e=7.5*10^-11/1.6*10^-19=46875*10^42.物体所带电荷等于多余或缺少电子的总电量(1)多余电子带电荷Q=(-1.6*10^-19)6.25*10^19=-1.6*6.25C=-10C(2)缺少电子带电...
举一反三
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
奥巴马演讲不用看稿子.为什么中国领导演讲要看?
想找英语初三上学期的首字母填空练习……
英语翻译
1,人们染上烟瘾,最终因吸烟使自己丧命.
版权所有 CopyRight © 2012-2019 超级试练试题库 All Rights Reserved.