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I'm quite confused here...in a reply to my post (see below) you say
that: 

> Density has dimensions of mass over unit volume.  In SI, that's
> g/cm3 (grams per cubic centimeters).  In a SCUBA cylinder
> with the valve closed, an increase in temperature does cause
> an increase in pressure (Amonton's Law), but since the total
> mass of the gas and its total volume don't change, neither
> does its density.

But yet, in another post, regarding the same topic, you state that:

> What heating a gas does is decrease its *density* not its
> viscosity which is a different animal altogether.

So...which is it? Unless I'm missing something here, you appear to have
contradicted yourself.

-Case
diveman@cy*.co*

-- 

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