[meteorite-list] Significant digits

From: Chris Peterson <clp_at_meteoritecentral.com>
Date: Tue, 09 Apr 2013 15:30:12 -0600
Message-ID: <51648864.2000901_at_alumni.caltech.edu>

Weight is a force, properly measured in Newtons (or some other unit of
force). And strictly, your comment should have referred to the
acceleration of gravity, not the force of gravity. Of course, mass and
weight are related by Newton's Second Law, F=ma. And it is quite true
that the acceleration of gravity changes with height, and therefore the
weight changes as well, since the mass is invariant (except for the
little detail of ablation...)

Chris

*******************************
Chris L Peterson
Cloudbait Observatory
http://www.cloudbait.com

On 4/9/2013 3:08 PM, Michael Mulgrew wrote:
> Kilograms are a unit of mass, which is regardless of the force of
> gravity. Although often spoken of as "weight", correctly it should be
> referred to as "mass".
>
> Michael in so. Cal.
Received on Tue 09 Apr 2013 05:30:12 PM PDT