Решение задачи по физике раздел 66 пункт 92 электро

92. Two balls with charges q1 = 6 nC and q2 = 12 nC are at a distance of r1 = 50 cm. What work should be done to bring them closer to a distance of r2 = 40 cm?

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