1.Identical 3 nC charges are located at the points (-9m, 0m) and (8m, 0m). What is the magnitude of the net electric field at the origin?

2.Find the magnitude of an electric field, in N/C, that exerts a 7.711017westward force on an electron. (2 sig figs)

3.What magnitude point charge, in nanocoulomb, creates a 5,000 N/C electric field at a distance of 0.44 m? (2 sig figs)