The statement (taking into account the later added context, i.e.
Jeppesen's text) is technically true, although not very useful in the
aviation environment.

As Jim L. pointed out, the presure is proportional to gas density and
temperature. That's all there is to it (the pressure is NOT the weight
of the the column of air). So when Jeppesen says "all else being
equal" while analyzing temperature and pressure, that "else" has to be
density. If density stays constant, higher temperature will result in
higher pressure.

But airplanes don't fly in an enclosed container where one can keep
the density constant. For example: higher temperature (all else being
equal :-) ) will tend to deacrease the density. And then there are
winds, ...

So the statement (although technically correct) is at best pointless,
and at worst (dangerously ?) misleading.

- Tom

On Mon, 6 Aug 2007 12:05:17 -0500, Dallas
wrote:

Brought over from RAS:


Assuming that all other variables remain constant:

An increase in temperature will result in a higher atmospheric pressure - a
higher temperature speeds up the movement of the air molecules, thereby
raising the pressure they exert on the surrounding atmosphere.

A) True
B) False