Question 1 Z Point on bisecting line Charge Q + + + + + + + + X What is the electric potential at the point on the axis which is at z = 3.50 m. The length of the rod is L = 1.30 m and the charge on the rod is Q = 4.80 nC. Question 2 A proton is fired at 1.59x10' m/s toward a mercury atom from far away. Mercury has a diameter of 14.0 fm and is element number 80. What is the closest distance the proton will get to the surface of the mercury atom