Two small charged spheres are located on the y-axis. One is at y = 1.00 m, the other is at y = −1.00 m, and they both have a charge of q = +1.60 µC.

(a) Determine the electric potential (in kV) on the x-axis at x = 0.670 m. kV

(b) Calculate the change in electric potential energy of the system (in J) as a third charged sphere of −3.70 µC is brought from infinitely far away to a position on the x-axis at x = 0.670 m. J

22. the top of a cliff is located a distance h above the ground. at a distance h/2 there is a branch that juts out from the side of the cliff, and on this branch a bird's nest is located. two children throw stones at the nest with the same initial speed, one stone straight downward from the top of the cliff and the other stone straight upward from the ground. in the absence of air resistance, which stone hits the nest in the least amount of time?