1. The problem statement, all variables and given/known data The two pith balls below each have a mass of 4.9 g and equal charge. One pith ball is suspended by an insulating thread. The other is brought to x = 3.5 cm from the suspended ball. The suspended ball is now hanging with the thread forming an angle of 30.0° with the vertical. The ball is in equilibrium with FE, Fg, and FT. Calculate each of the following. Fg (got that) Fe (Havent gotten that) Charge (Have no real clue how to get that) 2. Relevant equations Fe=(K(qa)(qb))/r^2 3. The attempt at a solution I'm assuming I'd be able to use Fe=(K(qa)(qb))/r^2 except I don't know how to find the charges. Also, as an unrelated question, how do I find Voltage with the electric field and distance in a parallel plate?