ch19-p023 - 23. In the reflection process, only the normal...

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23. In the reflection process, only the normal component of the momentum changes, so for one molecule the change in momentum is 2 mv cos θ , where m is the mass of the molecule, v is its speed, and is the angle between its velocity and the normal to the wall. If N molecules collide with the wall, then the change in their total momentum is 2 Nmv cos , and if the total time taken for the collisions is Δ t , 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.

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