Решение задачи по физике раздел 72 пункт 93 электро

93. Two charges were in oil (ε1 = 3) at a distance of 50 cm from each other. Then they were placed in water (ε2 = 81) at a distance r2 from each other. It turned out that the strength of the interaction turned out to be the same. Find the distance r2.

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