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75. A small ball weighing 2 ∙ 10−3 kg, suspended on a thin silk thread, carries a charge of 3 ∙ 10−7 C. What is the distance from below to bring another small ball with a charge of 5 − 10−7 C, so that the thread voltage decreases by 2 times?
Detailed solution. Decorated in Microsoft Word 2003. (Target decided to use formula editor)
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