Re: Mass/Energy Conservation

[Bob Sciamanda <trebor@VELOCITY.NET>]

I've often thought that a good Science Fair project might be to grow
something (a plant or a mouse or . . .?) in a sealed container resting on
a scale and measuring all input and output masses.  Perhaps this could be
more accureately done with micro-organisms?
(I think of an oak tree and ponder that all that mass could not have come
from the acorn - is it accountable for by water/mineral input?)

This probably has been done - any references?

Bob

Bob Sciamanda (W3NLV)
Physics, Edinboro Univ of PA (em)
trebor@velocity.net
http://www.velocity.net/~trebor

----- Original Message -----
From: "David Abineri" <dabineri@CHOICE.NET>
To: <PHYS-L@lists.nau.edu>
Sent: Sunday, December 10, 2000 04:49 PM
Subject: Mass/Energy Conservation


> I presume that, if you eat a pound of food, you will gain a pound of
> weight at that time.
>
> Now, over many days, one eats many pounds and produces many pounds of
> waste. How can one describe the mass and energy balance here. If the
> waste is less mass than the food, do you necessarily put on weight?  If
> not what happens?
>
> Thanks for any guidance,       Dave Abineri
>
>
> --
>  David Abineri   dabineri@choice.net