Re: capacitance formula

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Ed Phillips by way of Terry Fritz <twftesla-at-qwest-dot-net>" <evp-at-pacbell-dot-net>

Tesla list wrote:
> 
> Original poster: "davep by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<davep-at-quik-dot-com>
> 
> > Yes, but let's be careful out there:
>         Indeed.
> 
> >> >       1 in x 1 in / 0.5 in =2 in.
> > No, it equals 2 in^3
>         How?
> 
>                 Numerator ==> in**2
>                 Denominator ==> in
>         divide in**2 by in == in
> 
> >  likewise, 2.54 cm x 2.54 cm / 1.27 cm =
> 
>         cf above.
> 
> >> > 5.08 cm
> 
> > Again: cm x cm x cm = cm^3
>         Indeed.
> 
>         Subject equation, however, is:
>                 (cm*cm)/cm == cm
>         '/' is the conventional symbol for division.
>         '*' or 'x' is the conventional symbol for
>         multiplication.
> 
>         best
>         dwp

	In the SI system and probably all of the others, the "permitivity of
free space" is in dimensions of farads/meter.  In other words, to get
the dimensions (and values, of course) correct multiply the dielectric
constant by an expressions whose dimensions are length.

Ed