A point charge of +Q is plac
af; tb 90xt-mdg6kgu3,sz4r-xmqe *ved at 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 that acts on the center charge due to a third ch
r tq xgmkm3ftv *4b0-9uads,x6g- z;earge of +Q placed at one of the other vertices?