Re: Bernoulli (horizontal)

[Chuck Britton <britton@NCSSM.EDU>]

At  7:53 AM -0700  on  11/19/01,  John Mallinckrodt   wrote
> On Mon, 19 Nov 2001, John Barrer wrote:
>
> >  John - In response to #2 below: some external agent
> >  was responsible for the applied force which resulted
> >  in the pressure on the diamond. The 5000J of pressure
> >  energy show up as "work done" on the external agent as
> >  the pressure is released.
>
> This would only be true if the volume of the diamond increases
> very substantially, like by a factor of three, as the pressure is
> reduced.  In fact the volume of the diamond will increase
> by a tiny fraction, perhaps 1% at most, as the pressure is
> reduced.  Thus the work done on the external agent will be a few
> tens of joules at best.


I am quite surprised that diamond has this much 'hysteresis' as it it
squeezed and released.

Wouldn't we expect the expansion on release to be pretty close to the
initial compression.
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Chuck Britton                                   Education is what is left when
britton@ncssm.edu                               you have forgotten everything
North Carolina School of Science & Math         you learned in school.
(919) 286-3366  x224                            Albert Einstein,        1936