A point charge of +Q is placed a
4jb zxu ,d+hu/t the centroid of an equilateral triangle. When a second charge of +Q is placed at one of the triangle's vertices, an electrostatic force of 4.0 N acts on it. What is the magnitude of the force th
,ujb/d+hxu4 zat acts on the center charge due to a third charge of +Q placed at one of the other vertices?