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**1. Homework Statement**

Two small balls each with a mass of 25.0 g, are attached to silk threads 1.00m long and hung from a common point. When the balls are given equal quantities of negative charge, each thread makes an angle of 20degrees with the vertical. Find the magnitude of the charge on each ball.

**2. Homework Equations**

E = F/q

F = k*Q1*Q/r^2

E = k*Q/r^2

**3. The Attempt at a Solution**

I got the Net Force in the Y-direction to be .6946 N and the distance between the two balls to be .684m, but when I rearrange the equations and solve for Q I get 8.8E-6, but the answer is 2.15E-6

**1. Homework Statement**

**2. Homework Equations**

**3. The Attempt at a Solution**