Explaining Why Air Molecules Have Smaller Masses

[binbagsss]

account for the fact that air molecules have a smaller mass?

I have down in my notes something about if a larger particle was used then the average impulses would tend to 0, could someone please explain this?

thanks a lot !

 

[Earthmosphere]

Actually, the smoke particles have very small movements - so the air molecules hitting them must have a smaller mass - if they were bigger than the smoke , then the particles would be displaced by much larger amounts.
kinetic theory states that heat energy involves the vibration of molecules at all temperatures above absolute zero - the Brownian motion observations confirm that warm air molecules are in constant motion(vibration). Hope that helps your question!

-Earthmosphere