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Re: [ST] for Brett - fuel economy



On 4/17/06, Emile Nossin <Emile@xxxxxxxxxx> wrote:
>
> ... moisture should make the air density higher).


I had thought that moisture in the air actually decreased the density, hence
why aircraft don't like humid days.  When a water molecule replaces one of
oxygen, wouldn't it weigh less?  Atomic weight of 2 Hydrogens and an oxygen
(H2O) is significantly less than that of 2 oxygens (O2).

Somebody with a better grasp on chemistry and weather phenomena please
correct me if I'm mistaken.

David
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