Задача 31208.

The surface charge density of an infinitely extended the vertical plane equal to 9.8 x 10 -5 C / m ^ 2. By plane suspended on a thread charged ball of mass ´10 Determine the charge of the ball, if the thread forms with a plane angle of 45 °.

Detailed solution shorthand terms, formulas and laws used in the decision, the withdrawal of the calculation formula and the response.
If you have any questions to address, please. I try to help.