1. Calculate the net electric force on q2. (The diagram is not to scale) -1.00 nC +1.00 HC +1.00 nC Z q1 92 93 15.0 mm 1.00 cm W + -E fixed fixed [3] 2. A negatively charged oil drop has mass = 1.15 x10- kg and charge = -4.80 x 10-19 C. The oil drop is suspended between oppositely charged parallel plates with a voltage of 4.00 kV. Calculate the distance between the plates. [3]