A point charge of +Q is placed at the center of a squ
tg0qkh: e9q .vb80 ekbare, 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 center charge if a third charge of -Q is placed
qq evkg0k .8hbe:tb09at the lower-left corner?