52. A small ball suspended on a silk thread has a charge of 100 nC. In a horizontal electric field with a strength of 100 kV / m, the thread deviated from the vertical by an angle whose tangent was 0.125. Find the mass of the ball. (in g) g = 10 m / s2.

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