A uniform electric field exists in the region between two oppositely charged plane parallel plates. A proton is released from rest at the surface of the positively charged plate and strikes the surface of the opposite plate, 1.60 cm distant from the first, in a time interval of 1.50 X 10-6 s.
(a) Find the magnitude of the electric field.
(b) Find the speed of the proton when it strikes the negatively charged plate.