A point charge of +Q is plac
x62fk40d*fvv,ej wz o ed at the center of a square, and a second point charge of -Q is placed at the upper-left corner. It is observed that an electrostatic force of 2.0 N acts on the positive charge at the center. What is the magnitude of the force that acts on the cente
xeff4dzo w,0 j 6*kvv2r charge if a third charge of -Q is placed at the lower-left corner?