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*From*: "Bob Sciamanda" <treborsci@verizon.net>*Date*: Sun, 09 Nov 2014 19:13:19 -0500

JD wrote ==>

"2) The first edition of

Taylor & Wheeler

_Spacetime Physics_

was very influential. Very impressive little book. For

some students, this was the first physics book they ever

saw that had any semblance of class, of panache. It took

something that seemed ugly and complicated and showed it

to be simple and elegant.

Then, as sometimes happens with people, the book gained

weight and got uglier as it got older. I'm referring

to the second edition, which spends far too much time

talking about length contraction, time dilation, various

notions of velocity-dependent mass, and other stuff that

really should be left out entirely. I assume there was

market pressure from people who "expected" the book to

cover the archaic (pre-1908) approach, not just the

modern (post-1908) approach."

__________________

I'm confused. Here is a direct quote from page 251 of the 2nd edition ==>

". . . should we call invariant mass of a particle its "rest mass"?

That is what we called it in the first edition of this book. but a thoughtful student pointed out that the phrase "rest mass" is also subject to misunderstanding. . . . "

Bob Sciamanda

Physics, Edinboro Univ of PA (Em)

treborsci@verizon.net

www.sciamanda.com

**References**:**Re: [Phys-L] relativistic acceleration of an extended object***From:*Moses Fayngold <moshfarlan@yahoo.com>

**Re: [Phys-L] relativistic acceleration of an extended object***From:*John Denker <jsd@av8n.com>

**Re: [Phys-L] relativistic acceleration of an extended object***From:*Moses Fayngold <moshfarlan@yahoo.com>

**Re: [Phys-L] relativistic acceleration of an extended object***From:*Ken Caviness <caviness@southern.edu>

**[Phys-L] proper acceleration, proper time, proper length, spacetime geometry and trigonometry***From:*John Denker <jsd@av8n.com>

**Re: [Phys-L] proper acceleration, proper time, proper length, spacetime geometry and trigonometry***From:*Larry Smith <larry.smith@snow.edu>

**Re: [Phys-L] proper acceleration, proper time, proper length, spacetime geometry and trigonometry***From:*John Denker <jsd@av8n.com>

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