12. What is the distance between two charges of 23 -5.00 C each if the force of electrostatic repulsion acting on them is 5.00 X 103 N? 13. Charge A has a charge of -2.50 uC and is 1.50 m to the left of charge B, which has a charge of 2 +3.20 MC. Charge B is 1.70 m to the left of a third charge C, which has a charge of -1.60 MC. If all three charges are collinear, what is the net electrostatic force on each of the following? (a) charge B (b) charge C 40 Unit VI Forces and Fields