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-----Original Message-----
From: Forum for Physics Educators [mailto:PHYS-L@list1.ucc.nau.edu]On
Behalf Of Bob LaMontagne
Sent: Friday, June 25, 2004 9:00 PM
To: PHYS-L@LISTS.NAU.EDU
Subject: Re: vibration vs. oscillation
An electron has angular momentum - what's spinning -
external - internal ?
:-)
Bob at PC
*********** REPLY SEPARATOR ***********
On 6/25/2004 at 11:44 AM Todd Pedlar wrote:
At 10:59 AM 6/25/2004, Carl E. Mungan wrote:translate.
2. A particle cannot rotate or vibrate; it can only
add that
Yes, this follows from your previous sentence. I would
of internalrotational and vibrational energies are therefore forms
bulkenergy--they are relative to the COM--in contrast to the
definitely nottranslational energy.
A quibble on this statement, Carl. Rotational energy is
internal.because it is a BULK
Just as translational kinetic energy is not internal,
motion,have the same
so is rotational kinetic energy. All parts of the object
angularconstituents
velocity \omega. Internal energies must involve motion of
relativeof the bulk
to other constituents, and can never involve common motion
body,Physics
as both translational and rotational motions do.
Todd
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Todd K. Pedlar Assistant Professor of
pedlto01@luther.edu Luther College, Decorah, IAstatistical
http://academic.luther.edu/~pedlto01/
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Ludwig Boltzmann, who spent much of his life studying
mechanics, died in 1906, by his own hand. Paul Ehrenfest,carrying on the
work, died similarly in 1933. Now it is our turn to studystatistical
mechanics. Perhaps it will be wise to approach the subjectcautiously.
Goodstein, States of
-- David L.
Matter
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