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
>
>