A point charge of +Q is placed at the ce
yp 7ub1qj/e :h;b 8nv0wxwhz+ nter 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 th
vjh:xbn z/8hew;7py+uwq0 1b e center charge if a third charge of -Q is placed at the lower-left corner?