Subject: Re: <VV> Re: Saturn Sky HUMOR NO CORVAIR

[P.H. Raker]

Hey, guys,

You're both forgetting something ... Are you ready for this? ... It's
the gravity of the situation.

A column of EARTH atmosphere (air) weighs 14.7 lbs per square inch. 
What does a column of SATURN atmosphere weigh?  Quite a bit less.  It
all depends on the gravitational pull of the planet in question and the
gasses in the specific atmosphere.  Saturn's gravitational pull is less
than that on Earth (9.05m/sec^2 vs. 9.8m/sec^2), and it's atmosphere is
made up of primarily hydrogen, and helium (both lighter than air).

If you remove all the air from around a car it won't accelerate upward.
 Gravity still works in a vacuum.  The only way the car would rise is
if you could remove the air only from above and not below (perhaps the
car is sealed into a tube of infinite height but open on the bottom?). 
Then the differential air pressure between top and bottom would lift
the car only to the extent that atmospheric pressure times surface area
is greater than gravitational weight.  I'd rather try to lift the car
with a skyhook.

Enough levity about gravity!

Phil Raker
'65 Corsa 140/4

>
> So I calculated it for a sky.  The Saturn Sky is 161.1 inches
> by 71.4 inches, which gives a total surface area of 79.87875
> square feet.  I may be rusty here but from my high school
> science class I seem to recall that a column of air one foot
> square weights 14.7 lbs., give or take for barometric pressure,
> Ask Doctor Science!
> Norm Witte
> ******
> Hey Norm .. heh heh, the pressure at sea level is 15 lbs per
> SQUARE INCH ....   so the Sky would weigh ( 15 x 80 x 144 )
> lbs too much.
>
> So for a really good dirty trick, if you removed all the air
> from the top of someones little sky , it would take off
> straight up .... 
>



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