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Question
What is the microscopic origin of pressure?
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Solution
According to the kinetic theory of gases, the pressure exerted by the molecules depends on
- Number density n = `"N"/"V"`
- Mass of the molecule
- Mean square speed
The pressure is given by P = `1/3 "nm"bar("v"^2)` or P = `1/3 "N"/"V" "m"bar("v"^2)`
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