7. What is the change in potential energy of a 2.00 x 10% C charge that moves from a point where the potential difference is 5.25 V to a point where the potential difference is 8.45 V? 8. The magnitude of the electric field between 2 plates is 625 N/C. If the plates are 3.50 cm apart, how much work is done moving a 2.50 x 106 C charge from one plate to the other? 9. If a proton moves between 2 charged plates that have a voltage of 4.00 x 10*V, what velocity will the proton attain? 10. If a charge of 1.60 x 10-8 C is placed between 2 plates that are 35.0 cm apart and have an electric field strength of 2.00 x 104 N/C, what kinetic energy will the particle gain