Fundamentals Of Physics
Fundamentals Of Physics
11th Edition
ISBN: 9781119573968
Author: David Halliday
Publisher: WILEY
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Chapter 43, Problem 25P

SSM (a) A neutron of mass mn and kinetic energy K makes a head-on elastic collision with a stationary atom of mass m. Show that the fractional kinetic energy loss of the neutron is given by

Δ K K = 4 m n m ( m + m n ) 2

Find Δ K/K for each of the following acting as the stationary atom: (b) hydrogen, (c) deuterium, (d) carbon, and (e) lead. (f) If K = 1.00 MeV initially, how many such head-on collisions would it take to reduce the neutron’s kinetic energy to a thermal value (0.025 eV) if the stationary atoms it collides with are deuterium, a commonly used moderator? (In actual moderators, most collisions are not head-on.)

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*25 SSM (a) A neutron of mass m, and kinetic energy K makes a head-on elastic collision with a stationary atom of mass m. Show that the fractional kinetic energy loss of the neutron is given by ΔΚ 4m,m (m + m,) к K Find AK/K for each of the following acting as the stationary atom: (b) hydrogen, (c) deuterium, (d) carbon, and (e) lead. (f) If K = 1.00 MeV initially, how many such head-on collisions would it take to reduce the neutron's kinetic energy to a thermal value (0.025 eV) if the stationary atoms it collides with are deuterium, a commonly used moderator? (In actual moderators, most collisions are not head-on.)
A proton of mass m undergoes a head on collision with a stationary atom of mass 13m.  If the initial speed of the proton is 455 m/s, find the speed of the proton after the collision.
Given velocities of atom A is moving east with a velocity of 30.0 µm/s and collides with atom B moving at 20.0µm/s. Calculate the velocity after collision of the atoms.
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