.split() Qeustion

[Gene Heskett]

On Friday 16 August 2013 10:07:12 Roy Smith did opine:

> In article <520da6d1$0$30000$c3e8da3$5496439d at news.astraweb.com>,
> 
>  Steven D'Aprano <steve+comp.lang.python at pearwood.info> wrote:
> > On Thu, 15 Aug 2013 16:43:41 +0100, Chris Angelico wrote:
> > > A mole is as much a number (6e23) as the light year is a number
> > > (9.5e15).
> > 
> > Not quite. A mole (abbreviation: mol) is a name for a specific number,
> > like couple (2) or dozen (12) or gross (144), only much bigger:
> > 6.02e23. And I can't believe I still remember that value :-)
> 
> I remember it as 6.022e23 :-)
> 
> In my high school chemistry class, there was a wooden cube, about 1/2
> meter on a side, sitting on the lecture desk in the front of the room.
> The only writing on it was "6.022 x 10^23".  It sat there all year.
> 
> The volume of the cube was that of 1 mole of an ideal gas at STP.
> 
> > A light-year, on the other hand, is a dimensional quantity. Whereas
> > mole is dimensionless, light-year has dimensions of Length, and
> > therefore the value depends on the units you measure in:
> > 
> > 1 light-year:
> > 
> > = 3.724697e+17 inches
> > = 0.30660139 parsec
> > = 9.4607305e+12 kilometres
> 
> Hold your hands out in front of you, palms facing towards each other,
> one shoulder-width apart.  That distance is about one light-nanosecond.

Or a quite noticeable color shift when you are cutting coax cables for 
color phase matching, which we often had to do in an analog NTSC broadcast 
facility.  Where a 1 degree shift, may or may not have been noticeable, was 
the cable equivalent of 7.7601420788892939683e-10 seconds, which was for 
the small foam cored cables used for such, with a Propagation Velocity of 
0.78*C, only a very short length of cable.  I'd have figured how much but I 
got lost pushing buttons in kcalc just now and came up with something I'd 
have to use a micrometer to measure. Its been close to 30 years since I had 
to do such calcs on a near daily basis.  Your trivia factoid for the day, 
and I now return you to the regularly scheduled discussion going no where 
specifically.  :-)

Cheers, Gene
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