Consider a particle in a box, let be the time for particle to travel twice the length L of the box (i.e.,
to hit a given side once), and let
then
so the change in momentum is given by
for a particle of mass m.
References
Jeans, J. H. The Dynamical Theory of Gases, 4th ed. New York: Dover, 1954.
Jeans, J. H. An Introduction to the Kinetic Theory of Gases. New York: Macmillan, 1940.
Pauli, W. Thermodynamics and the Kinetic Theory of Gases. New York: Dover, 2000.
Weisstein, E. W. "Books about Kinetic Theory." http://www.ericweisstein.com/encyclopedias/books/KineticTheory.html.
Woods, L. C. An Introduction to the Kinetic Theory of Gases and Magnetoplasmas. Oxford, England: Oxford University Press, 1993.
