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Old 2008-09-26, 13:07   #9
davieddy
 
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"Lucan"
Dec 2006
England

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I know some members of this forum are allergic to physics,
but Van der Waals equation (which this is) is quite instructive
to derive, as an example of the principle that
rate of change of momentum of a system = total external force.
"a" accounts for molecular attraction, and "b" for their finite size.

David
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