[s-cars] Blown Hoses, MPG's & Cloaking Device Failure

[LL - NY]

Minor correction point. 29.92 in - Hg is the atmospheric pressure at
standard temp and pressure (68 degrees F, or 20 degrees C or for the
science folks, 293 K to the nearest whole degree). Atmospheric
pressure can certainly be higher, if the air is significantly cooler
and/or drier, it can reach over 30.7 in - Hg or slightly more, and it
can get significantly lower if hot and or humid, one of the lowest
recorded occured during Hurricane Ivan (think hot and HUMID) where it
dropped to 27.72 in-Hg. This may help explain some perfomance losses
and gains dependent on the weather in both atmospheric and super/turbo
charged cars (more of an effect due to greater diffs in pressure).

LL - NY

On Apr 11, 2005 1:07 AM, Djdawson2 at aol.com <Djdawson2 at aol.com> wrote:
> In a message dated 4/10/2005 2:44:24 PM Pacific Standard Time,
> manuelsanchez at starpower.net writes:
> 
> for mercury in the periodic table  (chemistry).  Atmospheric pressure
> (14.7psi) is equal to about 29.92 inches  of mercury.  Since that is the highest
> "inches of mercury" reading you can  have in earth's atmosphere, the same remains
> true for vacuum.  A total  absence of pressure would equal a reading of 29.92
> in of hg on your  gauge.  Most high performance vacuum pumps (like ones used
> to service A/C)  can only achieve about 26 inches of Hg.
>