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Date:         Sat, 4 Aug 2007 18:19:42 -0700
Reply-To:     Alistair Bell <albell@UVIC.CA>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Alistair Bell <albell@UVIC.CA>
Subject:      Re: Comments wanted on this portable fridge
Comments: To: Loren Busch <starwagen@GMAIL.COM>
In-Reply-To:  <86476e250708041808h7d738173xee8c3cae7f198255@mail.gmail.com>
Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed


start here:


http://en.wikipedia.org/wiki/Humidity




find the mass of the water in the air, then simple to calc the energy
needed to raise temp of water, (joules or calories, take your pic)




alistair








On 4-Aug-07, at 6:08 PM, Loren Busch wrote:


Sorry Mark, all my Physics 101 books just went to Goodwill.  Wouldn't
help
anyway, all in MKS anyway...


On 8/4/07, Mark Drillock <mdrillock@cox.net> wrote:
>
> OK, students on the list, snap quiz time. How much mass in one cubic
> foot of air at sea level and 50% humidity?  How much energy does it
> take
> to raise or lower that mass by 40 degrees F?
>
> Mark
> too old to remember how to figure this out
>
>
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