Canadian nuclear reactors use heavy water moderators in which elastic collisions occur between the neutrons and deuterons of mass 2.0 u. Part A What is the speed of a neutran, expressed as a frattin uf its original speed, after a head-on, elastic collision with a deuteron which is initially at rest? Express your answer using three decimal places. Submit Request Answer Part B What is its kinetic energy, expressed as a fraction of its original kinetic energy? Express your answer using three decimal places. ? K2 K1 %3D Submit Request Answer Part C How many such successive collisions will reduce the speed of a neutron to 1/243 of its original value? Express your answer as a number of collisions. ? n = collisions Submit Request Answer