The major shortcoming of Rutherford's model was that it was incomplete. It did not explain how the atom's negatively charged electrons are distrubuted in the space surronding its positively charged nucleus. A form of energy that exhibits wavelike behavior as it travels through space
I think it is 500 cm. Hope I helped!
Answer:
momentum=mass×velocity
momentum =400kg×20m/s=8000kg.m/s
