高二物理能者进!两个相同的金属小球(可视为点电荷)带电量为1:7,相距为r,两者相互接触后,再放回原来的位置,则他们之间的库伦力的大小变为原来的( )A.3/7 B.4/7 C.9/7 D.16/7请写出
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![高二物理能者进!两个相同的金属小球(可视为点电荷)带电量为1:7,相距为r,两者相互接触后,再放回原来的位置,则他们之间的库伦力的大小变为原来的( )A.3/7 B.4/7 C.9/7 D.16/7请写出](/uploads/image/z/13536197-53-7.jpg?t=%E9%AB%98%E4%BA%8C%E7%89%A9%E7%90%86%E8%83%BD%E8%80%85%E8%BF%9B%21%E4%B8%A4%E4%B8%AA%E7%9B%B8%E5%90%8C%E7%9A%84%E9%87%91%E5%B1%9E%E5%B0%8F%E7%90%83%EF%BC%88%E5%8F%AF%E8%A7%86%E4%B8%BA%E7%82%B9%E7%94%B5%E8%8D%B7%EF%BC%89%E5%B8%A6%E7%94%B5%E9%87%8F%E4%B8%BA1%EF%BC%9A7%2C%E7%9B%B8%E8%B7%9D%E4%B8%BAr%2C%E4%B8%A4%E8%80%85%E7%9B%B8%E4%BA%92%E6%8E%A5%E8%A7%A6%E5%90%8E%2C%E5%86%8D%E6%94%BE%E5%9B%9E%E5%8E%9F%E6%9D%A5%E7%9A%84%E4%BD%8D%E7%BD%AE%2C%E5%88%99%E4%BB%96%E4%BB%AC%E4%B9%8B%E9%97%B4%E7%9A%84%E5%BA%93%E4%BC%A6%E5%8A%9B%E7%9A%84%E5%A4%A7%E5%B0%8F%E5%8F%98%E4%B8%BA%E5%8E%9F%E6%9D%A5%E7%9A%84%EF%BC%88+%EF%BC%89A.3%2F7++++B.4%2F7++++C.9%2F7++++D.16%2F7%E8%AF%B7%E5%86%99%E5%87%BA)
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