Bob Sciamanda
Physics, Edinboro Univ of PA (Em) http://www.winbeam.com/~trebor/
trebor@winbeam.com
----- Original Message -----
From: "Bernard Cleyet" <anngeorg@PACBELL.NET>
To: <PHYS-L@LISTS.NAU.EDU>
Sent: Thursday, February 17, 2005 8:33 PM
Subject: Re: collision question
| Is this an argument for the quantization of the field?
No, but why would you ask???
|
| bc, who, whatever, wouldn't call it dissipation.
Two electrons flying by (while repelling) each other, generate E/M radiation
fields which carry away momentum/energy. This momentum/energy is lost to
the two particle system and is ultimately absorbed and thermalized by the
lab walls and/or other objects. Why can I not say that momentum/energy has
been dissipated by the two particle system?
|
| Bob Sciamanda wrote:
|
| >Because of the third law, all Newtonian interactions will conserve
momentum
| >among the interacting objects. However, momentum can leave the system of
| >interacting objects via E/M waves (dissipation of momentum?). Of course,
| >overall momentum is still conserved. (Newton's third law is a special
case
| >corollary of the conservation of linear momentum.)
| >
| >Bob Sciamanda
| >Physics, Edinboro Univ of PA (Em)
| >http://www.winbeam.com/~trebor/
| >trebor@winbeam.com
| >----- Original Message -----
| >From: "John Barrer" <forcejb@YAHOO.COM>
| >To: <PHYS-L@LISTS.NAU.EDU>
| >Sent: Thursday, February 17, 2005 2:29 PM
| >Subject: Re: collision question
| >
| >
| >|A related question: Does anyone have a
| >| conceptual-level explanation for why there are no
| >| momentum-dissipative mechanisms in collisions? On the
| >| micro level, if some of the original KE goes to
| >| increasing the internal vibrations (and internal KE)
| >| of the objects, why does momentum not get transferred
| >| in the same fashion? I've never heard (or been able to
| >| give) a satisfactory explanation to this question.
| >| Thanks for any pearls of wisdom.
| >| John Barrere University HS, Fresno, CA