Electronic balances was A weighty subject

[Cliff Parker <cparker@EMPOWERING.COM>]

> I routinely switch one of them to ounces when I need to "weigh" a
> letter or package that I intend to mail.  (Why convert from grams to
> ounces in my head, if the scale will do it for me.)  Now suppose it
> says that my envelope weighs 1.20 ounces.  In my lab at Bluffton
> College, that is probably pretty darn close.  But if I take that same
> envelope and same balance to the moon, it will still say that my
> envelope weighs 1.20 ounces... and Jim, that is wrong.

Is this correct?  If so then I am in need of some insight as to how electronic balances
work.  Will someone please fill me in.

Cliff Parker