home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!olivea!sgigate!rutgers!netnews.upenn.edu!sagi.wistar.upenn.edu
- From: weemba@sagi.wistar.upenn.edu (Matthew P Wiener)
- Newsgroups: sci.physics
- Subject: Re: energy, mass, and all that
- Message-ID: <98735@netnews.upenn.edu>
- Date: 22 Nov 92 22:17:09 GMT
- References: <19NOV199211063691@csa1.lbl.gov> <98407@netnews.upenn.edu> <20NOV199207183499@csa3.lbl.gov> <98706@netnews.upenn.edu> <MATT.92Nov22131728@physics.berkeley.edu>
- Sender: news@netnews.upenn.edu
- Reply-To: weemba@sagi.wistar.upenn.edu (Matthew P Wiener)
- Organization: The Wistar Institute of Anatomy and Biology
- Lines: 16
- Nntp-Posting-Host: sagi.wistar.upenn.edu
- In-reply-to: matt@physics.berkeley.edu (Matt Austern)
-
- In article <MATT.92Nov22131728@physics.berkeley.edu>, matt@physics (Matt Austern) writes:
- >> and for mass it is just the inertial resistance to an acceleration.
-
- >This isn't a terribly good definition of mass, since force and
- >acceleration aren't proportional---i.e., the acceleration an object
- >undergoes is not parallel to a force that is applied to it. [...]
-
- I agree that I left out all the details.
-
- >In a relativistic context, however, I think a more useful definition
- >of mass is that an object's mass is the energy of that object in its
- >rest frame. [...]
-
- I also agree that other uses are around for good reason.
- --
- -Matthew P Wiener (weemba@sagi.wistar.upenn.edu)
-