Re: [PSUBS-MAILIST] cubic feet / gallons conversion

["Brett" <brettpinkepank@yahoo.com>]

To answer your question,"Is a cubic measurement of one nitrogen the same as
a cubic measurement of boiling water the same?" the answer is yes.  Look at
it like this, if you have a box that is one foot cubed and fill it two the
brim with whatever awful substance you could imagine and then close the box
and put it under water it will displace the same amount of water or volume
as any other substance when put in that 1 foot cube.  Volume is the amount
of space that something takes up, it doesnt matter what state of matter
something is or how much it ways.  So when you say a cubic feet of something
its like saying how many 1 foot cubed boxes you can fill with that
substance.
    So when you have the number that was mentioned earlier 0.13368 its like
saying that when you pour that gallon of water in a 1 foot cubed box that it
will fill it 13.368% full.
    Now the mass of a cubic foot is something entirely different a cubic
foot of something will vary greatly depending on what you are taking the
measurement of and I think that the thought of water and say noitrogen in
diferent states with totaly diffent masses is were the confusion comes into
play.
    Also quanity of a substance is totally diffent than volume.  When you
start to get technical you cant start to count the number of molecules some
thing has through the use of mass and mole ratios the quanity of something
will never change as long as you never add or remove anything volume can
increase and decrease as something is heated cooled or has pressure applied
or relieved the volume changes as the space in between molecules increases
and decreases.
    Multiplying a volume by a number such as the one said above to change
units does nothing to either quanity or physical volume of the substance so
it can be said that you can use that number to transfer gallons of anything
to cubic feet and vice versa
    I hope that this clears any confusions or misinturpretations up.

Brett Pinkepank
-----Original Message-----
From: BluWtrSailr@aol.com <BluWtrSailr@aol.com>
To: personal_submersibles@psubs.org <personal_submersibles@psubs.org>
Date: Wednesday, April 24, 2002 6:20 PM
Subject: Re: [PSUBS-MAILIST] cubic feet / gallons conversion


>In a message dated 4/21/02 9:27:09 PM EST, coalbunny@onewest.net writes:
>
><< Charles, a gallon is a gallon is a gallon is a gallon.  regardless of
> the liquid you put in it- gasoline, JP-4, nitroglycerine, mercury,
> uranium hexaflouride, or water.  The weight of the gallon is a different
> story.  Water is around 8 or so pounds per gallon.  I don't know about
> mercury or JP-4. >>
>
>I agree...I just don't think that a gallon of all fluids can be converted
to
>cubic feet equally...Is a cubic measurement of liquid nitrogen the same as
a
>cubic measurement for boiling water?  It just seems like their being at
>oppossite sides of the spectrum creates a lot of room for question.  I know
>that all different densities will weigh different,(mercury is about 32lbs
per
>8 ounces) but were not discussing weight, instead, we are looking at
volume.
>It doesn't seem right that's all.
>
>Charles