Re: There's work, and then there's work

[David Rutherford <drutherford@SOFTCOM.NET>]

Robert Cohen wrote:
> I would like to respond to David Rutherford's argument that energy is=
>  associated with both the heat gained by the surroundings (via what h=
> e calls the transverse component velocity) and the kinetic energy ass=
> ociated with the current (which he relates to the longitudinal compon=
> ent velocity).
>
> This is actually a common source of confusion for my students and so =
> I would like to see it better addressed than it has.  DR is right tha=
> t, at any given time, only part of the energy (associated with the ki=
> netic energy of the electrons) will be converted to heat as measured =
> by the calorimeter experiment.  However, the key point that I think m=
> y students (if not DR) miss is that eventually the current will stop.=
>   At that point, all of the energy will be dissipated to the calorime=
> ter.

What about the energy dissipated as heat to the galvanometer?

-
Dave Rutherford
"New Transformation Equations and the Electric Field Four-vector"
http://www.softcom.net/users/der555/newtransform.pdf

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