An electron, starting from rest, is accelerated by a uniform electric field of 9.00 x 104 N/C that extends over a distance of 4.00 cm. What is the speed of the electron when it leaves the region of the uniform electric field? O 5.27 x 104 km/s O 3.56 x 104 km/s O 2.18 x 104 km/s O 4.38 x 104 km/s 2.51 x 104 km/s