(2) 8. A proton gains 1.76 x 10-15 J of kinetic energy as it passes through an electric field. Calculate the potential difference causing its acceleration. (3) 9. a) Determine the maximum speed an alpha particle could obtain if it moves from rest through a potential difference of 8.40 kV. Hint: see workbook p. 107 b) State the physics principle you used to solve this