Air Pressure
what is it?
to confirm what air pressure is, we have to know what pressure mean is. Pressure is amount of energy, mass or force on a unit area. Air and water basically called fluid. So in this case the nature of air and water can be said to be similar. fluid possesses such as pressing in any direction, that's why it follows the shape of the containers.
Kinetic Theory of Gases
one of the postulate says, during collisions, the interactions among molecules are negligible. (That is, they exert no forces on one another.)
This implies:
1. Relativistic effects are negligible.
2. Quantum-mechanical effects are negligible. This means that the inter-particle distance is much larger than the thermal de Broglie wavelength and the molecules are treated as classical objects.
3. Because of the above two, their dynamics can be treated classically. This means, the equations of motion of the molecules are time-reversible.
what these statement means?
I believe they want to say that the elasticity of the molecule has perfect resilience (elasticity = 100%), where it is contrary to law of elasticity which has been explained that there is not one single item that has perfect elasticity.
So the Biggest question is, if the elasticity of the air molecules are not 100% then somehow the molecules will lost its energy. and if the molecules run out of the energy then it won't be move any longer. yes... we all know, as long as sun is coming up, the molecules won't be run out of the energy. However, if the sun not exist anymore, what happen to the atmosphere?
let's find out....
