Re: Mass/Energy Conservation

["Bernard G. Cleyet & Nancy Ann Seese" <georgeann@REDSHIFT.COM>]

To obtain all our responses, I'll bet!!

Vernier sells the equip. to measure respiration products, and, therefore,
metabolism.  I think.  (I found one for the metabolism of peas -- glucose to
CO2.)

David Bowman wrote:

> Also, don't forget sweating, tears, & other secretions and the
> evaporation of such; skin cell exfoliations, hair loss, etc., etc.
>
> BTW, what's the point of Dave A.'s initial question anyway?
>
> > I assume that you are remembering to include drinking water in the
> > "food" calculation.  There are other mass exchanges as well with
> > sweating and respiration.  We breath out a lot of water vapor (its been
> > -30 here in Winnipeg this week, I've seen that one a lot) plus exchange
> > O2 for CO2.  Hence there is a net loss of weight from breathing.  This
> > might be an interesting back of the envelope calculation.
>
> (Doug, how do you manage to see water *vapor*?  ;-) )
>
> David Bowman
> David_Bowman@georgetowncollege.edu