Consider a uranium nucleus to be sphere of radius R = 7.4 x 10-15 m with a charge of 92e distributed uniformly throughout its volume. (a) What is the electric force (in N) exerted on an electron when it is 2.8 10-15 m from the center of the nucleus? 2703.7 N (b) What is the acceleration of the electron at this point (in m/s)? m/s