A point charge of +Q is pla
nh*k/ 8ay4uvo/ kqd7bced 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
okkd*7y quvn8ha4//bthe force that acts on the center charge if a third charge of -Q is placed at the lower-left corner?