Wayne,
saying a parcel of air rises because it is warm OR rises because the cooler
air around it forces it up is describing the same thing, except from
different view points.
Your "rule"
"A parcel of air cannot rise away from the earth by itself as it has a
mass, this mass is acted apon by gravity"
is trivially true, but not a useful statement.
A parcel of air cannot _exist_ _by itself_
Regards
SWK
----- Original Message -----
From: "Wayne Carter" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Thursday, May 01, 2008 9:05 PM
Subject: [Aus-soaring] Waynes Rule
> At the risk of embarrassing myself on a world-wide scale, I ask you all
> to join a yahoo group discussion on thermals at
>
> http://groups.yahoo.com/group/thermal_truth/
>
>
> Wayne Carter
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