Решение задачи по физике раздел 73 пункт 67 электро

67. Three identical negative charges q = −9 ∙ 10−9 C are located at the vertices of an equilateral triangle. What charge q1 must be placed in the center of the triangle so that the system is in equilibrium?

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