clipka wrote:
> Strictly speaking, there's no such thing as a "pulling" force in air.

Sure there is.  Ever heard the phrase "nature abhors a vacuum"?  That's 
a pulling force.  Any decrease in pressure in an atmosphere will cause 
molecules to be drawn to the source of the pressure difference.

--
Tim Cook
http://empyrean.freesitespace.net

Post a reply to this message