A point charge of +Q is placed at t
:1 0tasiz x 4cixj28mc8d8s)k*teg gujf mm,-he 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 center charge if a third charge of -Q is
fsmg )1x8i8gm u208c,i atc4zx-ej*m:jskd tplaced at the lower-left corner?