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RE: Units of electricity

Original poster: "Godfrey Loudner" <ggreen@xxxxxxxx>

I think these matters are sufficiently explained in "Advanced
Engineering Mathematics, Wylie, McGraw-Hill, Fourth Edition. See Chapter
5, Mechanical Circuits and Electrical Circuits. While its nice to know
about the analogy, I never found it useful in my electricity hobby. In
the practical sense, it might be useful and cheaper to build an electric
circuit analog of a mechanical system to predict performance; but I
don't think the analogy has any great theoretical value.

Godfrey Loudner

-----Original Message-----
From: Tesla list [mailto:tesla@xxxxxxxxxx]
Sent: Thursday, August 24, 2006 5:32 PM
To: tesla@xxxxxxxxxx
Subject: Units of electricity

Original poster: Jared E Dwarshuis <jdwarshui@xxxxxxxxx>

Hi Jared,

Didn't Tesla himself use the old mechanical analogies for tuned circuit,
i.e. likening them to a mass on spring with friction,  referring to
things like impedance as inertia, or am i mistaken here?  I have often
noted the similarities between mechanical and electrical systems.  Take
for example the energy stored in a capacitor E=1/2CV^2  (c=capacitance,
v=voltage) and then look at the energy in a moving object E=1/2MV^2
(m=mass, v=velocity).  I agree with you, but it would be nice to see
these things worked out from first principles.


Chris R