Chronology Current Month Current Thread Current Date
[Year List] [Month List (current year)] [Date Index] [Thread Index] [Thread Prev] [Thread Next] [Date Prev] [Date Next]

Re: IONS



At 4:35 PM +0100 9/21/98, Ludwik Kowalski wrote:
Chuck Britton wrote:

Chemists do a demo with a glass rod hooked up to 120 VAC.
When the rod is heated to a dull glow with a torch, enough
current flows to maintain the joule heating of the rod.

Like any piece of good information this begs for questions.
The first one has to do with a desire to reproduce the
experiment.

<snip>

Perhaps the "glass" chemists use is not
pure. But how can it be; they are in the best position to
know.
Ludwik Kowalski

remember that 'glass' is seldom pure SiO2. It is called quartz when it IS pure.
Glass(es) include various 'fluxes' that help them melt at a lower
temerature than quartz does. Flux, such as NaBO4, could certainly
contribute to conduction.


Remember also that a temperature of 500 C leads to the Maxwell-Boltzmann
distribution of kinetic energies rather than one SINGLE energy value.

-. .-. .-. .-. .-. .-. .-. .-. .-. .-
\ / \ / \ N / \ C / \ S / \ S / \ M / \ / \ /
`-' `-' `-' `-' `-' `-' `-' `-' `-'
Chuck Britton Education is what is left when
britton@odie.ncssm.edu you have forgotten everything
North Carolina School of Science & Math you learned in school.
(919) 286-3366 x224 Albert Einstein, 1936