A charged oil drop with a mass of 2 x 10-4 kg is released from a location 30 cm from the center of a large charged sphere demonstrated below. If Qsphare = 8 m0 , find a) the change in the electric potential between initial and final location of the oil drop that carries 14.4 x 10-13 C of charge and travels 20 cm. b) the final velocity of the oil drop after traveling for 20 cm Ignore gravitational pull by Earth Use following constants: k = 8.99 x 109 N mzlc2 , so = 8.854 x 10-19 (39le2 m (milli) = 10-3