23. In the reflection process, only the normal component of the momentum changes, so for one molecule the change in momentum is 2mvcosθ, where mis the mass of the molecule, vis its speed, and is the angle between its velocity and the normal to the wall. IfNmolecules collide with the wall, then the change in their total momentum is 2Nmvcos, and if the total time taken for the collisions is Δt, then the average rate of change of the total momentum is 2(
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This note was uploaded on 06/03/2011 for the course PHY 2049 taught by Professor Any during the Spring '08 term at University of Florida.