A point charge of +Q is placed a
sdw.qrkf 173s sf40xd bb7 mx )m)l.oot 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 the fo
f7b )dsf43xkx 7l.wqd )r .o0 b1somsmrce that acts on the center charge if a third charge of -Q is placed at the lower-left corner?