home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!sun-barr!cs.utexas.edu!wupost!zaphod.mps.ohio-state.edu!uwm.edu!ogicse!das-news.harvard.edu!husc-news.harvard.edu!husc10.harvard.edu!mcirvin
- From: mcirvin@husc10.harvard.edu (Mcirvin)
- Newsgroups: sci.physics
- Subject: Small clarifications for my big article on four-vectors
- Summary: Just some tweaking...
- Keywords: four-vectors
- Message-ID: <1992Jul21.222902.14036@husc3.harvard.edu>
- Date: 22 Jul 92 02:29:00 GMT
- Article-I.D.: husc3.1992Jul21.222902.14036
- Distribution: world
- Organization: Harvard University Science Center
- Lines: 24
- Nntp-Posting-Host: husc10.harvard.edu
-
- In my big article on relativity and four-vectors, I wrote:
-
- >We then have a very nice-looking
- >relation between four-vectors
-
- > P = mV ,
-
- >where P is the four-momentum, V is the four-velocity, and
- ^^^^^^^^^^^^^
- >m is the invariant, unchanging mass.
-
- Just to be clear: this "four-momentum" P is the same thing as the
- "energy-momentum four-vector" P mentioned earlier.
-
- >Four-acceleration A is the derivative of four-velocity with
- >respect to time.
- ^^^^
- That's *proper* time, not the t coordinate.
-
- I hope you enjoyed the article... boy, am I wasting a lot of time
- these days.
-
- --
- Matt McIrvin mcirvin@husc.harvard.edu Long live short .sigs
-