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Re: Tesla Coil Operation - was "Harmonics"
to: Bryan
Correct --- I had mass listed -- should have been length. I guess it could
also be called "effective length" and considered an inertial moment arm,
but that's too technical for the young, casual museum visitor.
Dr.Resonance-at-next-wave-dot-net
----------
> From: Tesla List <tesla-at-pupman-dot-com>
> To: tesla-at-pupman-dot-com
> Subject: Re: Tesla Coil Operation - was "Harmonics"
> Date: Monday, February 01, 1999 12:26 PM
>
> Original Poster: Bryan Work <bryan-at-apexrad-dot-com>
>
> D.C.
>
> I'm sure you must mean that the pendula with the same length oscillate
first,
> the actual mass should have no bearing on harmonic frequency unless the
mass
> affectes the *effective* length of the pendulum.
>
> Bryan Kaufman
>
> > Original Poster: "D.C. Cox" <DR.RESONANCE-at-next-wave-dot-net>
> >
> > to: Antonio
> >
> > An interesting corollary is to use a long shaft of semi-flexible
material.
> > Attach pendulums (sorry -- no penduli) of different mass. As the first
> > pendulum in activated the pendulum of the same mass located further
down
> > the shaft will begin to oscillate as you described. The interesting
part
> > is that pendulums of different mass do not oscillate (very small
amplitude
> > if at all) which dramatically illustrates the concept of tuned circuits
> > while other nearby circuits of different frequency (mass in our
mechanical
> > example) oscillate only a very small amount.
> >
> > We have made this exhibit for various museums and the children are
always
> > amazed that both nearby pendulums and pendulums of lighter mass don't
start
> > to oscillate first. It's a simple exhibit to fabricate and is very
> > instructive for anyone to use prior to the Tesla coil demonstration of
> > electrical resonance.
> >
> > DR.RESONANCE-at-next-wave-dot-net
>
>
>