43. A thin silk thread withstands a maximum tension of 10 mN. A ball of mass 0.6 g, having a positive charge of 12 nC, is suspended on this thread. From below, in the direction of the line, a ball with a negative charge of −3 nC is brought to it. At what distance between the balls does the thread break?

Detailed solution. Decorated in Microsoft Word 2003. (Target decided to use formula editor)