Re: capacitance of a rectangular box

In article <Pine.WNT.4.64.0605300434390.1484@xxxxxxxxx>, "Timo A. Nieminen" <timo@xxxxxxxxxxxxxxxxx> writes:
On Mon, 29 May 2006, mmeron@xxxxxxxxxxxxxxxxxx wrote:

"Timo A. Nieminen" <timo@xxxxxxxxxxxxxxxxx> writes:
On Mon, 29 May 2006, jmfbahciv@xxxxxxx wrote:

I suppose that the longer the drop, the more elongated the
drip would become? hmmm...Is there a common shape that
any liquid approaches while dropping? I wonder if it
changes w.r.t. different g's.

Spherical. This can be distorted by air resistance; large drops can even
by broken up into smaller ones. Raindrops tend to be a little flattened
due to air resistance; I've seen computer code that uses Chebyshev
polynomials to represent their shape. But spherical will do, for most
drops and for most purposes.

The "classical" teardrop shape, with long tail, is obtianed at the
moment the drop breaks away from the stream, due to surface tension.
That's validfor pouring, of course, not for drops which condense from
vapor. During the fall the tail is being gradually "sucked in"
(again, due to surface tension) so if you had a sufficient time to
fall, the drop indeed becomes spherical.

Molten metal dropped into water doesn't usually have that sufficient time
unless you go to some effort to provide it.

Indeed. Hence the shot towers, mentioned by Jim.

But then, how else could it
have been used as a method of divination (eventually turned party game)?

Yep. Some of the shapes obtained are fascinating.

Interestingly, after all these years I'm back to playing with molten
metals, as these provide very interesting liquid surfaces to study.

Mati Meron | "When you argue with a fool,
meron@xxxxxxxxxxxxxxxxx | chances are he is doing just the same"
.

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