Consider two point charges located on the x axis: one charge, q1 = -15.0 nc , is located at x1 = -1.725 m ; the second charge, q2 = 38.0 nc , is at the origin (x=0.). what is the net force exerted by these two charges on a third charge q3 = 46.0 nc placed between q1 and q2 at x3 = -1.075 m ? your answer may be positive or negative, depending on the direction of the force.