D). located out side the nucleus
1 ft =12 in
4 in = 0.333 ft
volume = (п/4)*(0.333)² = 0.087 ft²
vol. flow = spead *volume
=3 ft/s * 0.087 ft²
vol flow = 0.261 ft³/s
Force on electron due to electric field is given by



now the acceleration is given by



so above is the magnitude of acceleration and its direction is opposite to field as electron is negatively charged so direction is towards SOUTH
D, releases a massive amount of energy as heat Hope this helps