On Fri, 13 Jan 2006 16:11:29 UTC, Denis
wrote:

: Ian Johnston a écrit :
:
: What the unititaited don't realise is that forces can be transmitted
: by pressure or by momentum flux.

: Please explain us how momentum flux can be transmitted in a gas without pressure change. I think you will get at least a Nobel Price for such a revolutionary theory ;-)

Eh? Any fluid crossing the boundary of a control volume takes momentum
with it. That's a momentum flux. Elementary fluid mechanics.

Ian