Re: Impedance &c.

[Bernard Cleyet <anngeorg@PACBELL.NET>]

I don't know what in and ex - tensive variables are, but I do know
mechanical Z is force applied / velocity resulting;
Z (transmission line) is (L / C) ^ 0.5 (per unit length), and specific
acoustical is, pressure due to wave / particle velocity, or at least so
wrote Braddick in "Vibrations, waves, and diffraction"

Mmmmm, force times velocity is P.

bc

Chuck Britton wrote:

> good show Leigh!
>
> one of MY random questions on impedance, mulled over for some the years.
>
> Electrical resistance of course is V / i  ( or Z = E / j for the
> sophisticates )
>
> Power is (V) x (i.).
>
> My question (suspicion) is:
> are other impedances also going to be expressed as the ratio of an
> intensive variable to an extensive variable - with the product of
> these two variables being power???
>
> a 'simple' system to analyze would be a spring loaded gun shooting a
> projectile of mass m.
>
> and what IS the impedance of a simple lever system?
cut