Two 2.50-cm-diameter disks spaced 1.70mm apart form a parallel-plate capacitor. The electric field between the disks is 5.00×105V/m .
Part A: What is the voltage across the capacitor?
Part B: An electron is launched from the negative plate. It strikes the positive plate at a speed of 2.20×107 m/s . What was the electron's speed as it left the negative plate?