A point charge of +Q is placed at the cen
k * .3wzpjfe u7fc*;b xmo/9ycter 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
xoecm;*w/ fck3 9 * 7yjbpzuf. center charge if a third charge of -Q is placed at the lower-left corner?