How Does the Poluly Equation Explain Speed and Pressure at a Microscopic Level?

[tianbian]

So many years.
I always confused in some principle(i mean sharp pointed)questiones.
first one is the biggest one.

How to explain the Poluly equation(i mean the relationship between the speed and pressure) in the level of microcosmical. (spoted! i mean the level of microcosmical but not consider the atomic reactions,we just consider it's a lot of small ball,as small as possball)

I think this equation is a very simple very beautiful equation.So there must be a very beautiful and very wonderful and very depth and very interesting reasones.

 

[tianbian]

Somebody says it's N-S equation.
I'm not sure.
The question can't be so complex as N-S question.
If it's,must be very simple,but comefrom N-S question.

 

[tianbian]

good