Can whole volume of gas act as Wave??????

I want to explain an event... before that you have to agree on 2 points.. if u dont comment please :

1) internal momentum or force or anything cannot inside a closed system produce motion relative to the external system

2)Air is large bunch of randomly moving molecule

One man is inside a closed container in somewhere far in space with no force is acting on this system and the container contains air. the man is holding in a knob like thing in one side... and similar knob is on the other side of the box.

He pusses himself against the knob with a force F and let go the knob. he moves with a velocity V in one direction and the container moves in opposite direction with same velocity. After some time the man and the other side of the container meet. They collide and the man quickly holds the other knob. During his motion inside the box, he collided with millions of molecules moving in the random direction.for now, looking only in the direction of the motion, it may not be possible for equal no. of molecule to hit the man from both(towards and opposite)direction of motion( as the molecule are moving ranodmly) while moving through the air. So his final velocity(the velocity when he reaches the other end) may have increased or decreased as molecules randomly added their Vs to the man. But for the container the velocity has remained the same all the time. SO, there is difference in V during the final collision. AND as the man hold the knob again, he has again connected back to the system preventing to develop two different momentums. BUT motion of the both container and man donot cancel as they have different Vs than they had when they separated with equal Vs. THIS makes the system move in the one of the direction.

A object inside a Closed system affected the outer system( the whole container and the universe). This cannot not happen, as we know. SO my question arises-- DID the air molecules acted in such a way that it was not random?? or equally distributed like a wave????????? to provide same Vs from both direction?

Edited May 26, 201015 yr by darkanzel