Question 8 1 pts Three small identical metal spheres P, Q, and R, each carries initial charges: qp = +8.0 nC, qQ = -2.0 nC, and qR = -1.0 nC, respectively. Sphere P and Q are touched together and then separated. Then spheres Q and R are touched together and separated. Afterwards what is the charge [Select ] on sphere Q? The three charges are then aligned at equal spacing d = 1.0 cm in a straight line, as shown in the figure. Regard three spheres as point charges. What is the net force magnitude (in units of UN) [ Select ] on sphere Q? What is the direction [ Select ] V of the net force on sphere Q? Consider only electric forces on the charges. d d P Q R