Three charges are arranged in straight line as in the figure below. The left most charge is +10.0 nC. The distance between the left and middle charge is 2.00 cm. The third charge has an unknown amount of charge but is 4.00 cm away from the middle charge. The net force on the middle charge is zero. A. What is the magnitude of the right most charge? B. Does the right most charge have an excess of electrons, protons, or neither? How do you know? 2.00 cm +10.0 nC Fact=ON 4.00 cm 9-?