physics

3. A stationary atomic nucleus undergoes radioactive decay and a beta particle (a fast- moving electron) and a neutrino (a subatomic particle) are detected leaving the nucleus at high velocities as shown in the following figure. The momentum of the beta particle is 9.2* 10-21 kg m's [S] and the momentum of the neutrino is 48 x 10-21 kgm/s The mass of the remaining nucleus is 36 10-25 kg. p = 4.9 x 10-21 p = 9.2 x (kg)m/s [Sl a. What is the recoil velocity ofthe remaining nucleus? b. If the recoil velocity measured is significantly different from the value calculated in part a, what conclusion might a nuclear physicist reach about the decay? 4. Object 1, with a mass of 2.0 kg, is sliding along frictionless ice at 12 mis [El when it collides with stationary object 2, which has a mass of 3.0 kg. Object 1 moves off at [E 400 NI and object 2 moves off at [E 300 S]. a. Find the magnitude of the velocity of each object, after the collision. b. Was the collision elastic or inelastic? Explain pur reasoning S. Steel ball A, with a mass of 1.5 kg. is rolling at 4.2 mis [El when it collides with stationary 12 kg steel ball & After the collision, steel ball Ais moving at 3.3 mJs [E 30' N] Find the final velocity of steel ball a after the collision.