A helium nucleus of mass m = 6.64 x 10-27 kg and charge q- 3.20 x 10-19 C is in a constant electric field of magnitude E calculate the nucleus' acceleration and its displacement after 1.50 s if it starts from rest. (Indicate the direction with the sign HINT (a) the nucleus' acceleration (in m/s) 1.90 x 10- 1.90 x 107 N/C pointing in the positive x-direction. Neglecting other forces, of your answer.) m/s (b) its displacement (in m) m