Robert Bonomi wrote:
In article ,
Bill wrote:
"Robert Bonomi" wrote in message
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In article ,
Max wrote:
"Chris Friesen" wrote in message
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On 03/24/2010 11:18 AM, wrote:
Let's say you have a board that is 1" thick, 3" wide, 6" long.
The "ends" are where the grain shears off.
The "edges" are the thinner sides.
The "faces" are the wider sides.
But if I were to rip a thin strip off ...say 1/2" wide, so that the
smaller
"board" is 1 x 1/2 x 6...have the "edges" and "faces" changed places?
Is the "edge" still the thinner (1/2") side?
Personally I'd say yes. The edge should be the thinnest side that shows
long grain.
Of course it gets tricky if you have pieces with a square cross-section.
Incidentally, for cabinetmaking plywood the second dimension is the
grain direction. So an 8x4 sheet has the grain going the short way.
Chris
Lowe's has some 4X4 sheets.
What is one to do?
Do what a purported disconnected number recording at MIT once advised:
"The number you have called is imaginary,
Please rotate your phone 90 degrees, and try again."
Cute. You mean multiply it by exp^(i \PI /2).
No, I don't 'mean' that.
If I'd said that, it would *not* have been acurate reportage of the story
_as_I_heard_it_.
I've never seen the word
imaginary and degrees in the same sentence--no, never before.
Admittedly, it is a complex subject.
But, even with 'pure' imaginaries, it's still a matter of degree.
what's sqrt(-i), for example? "imaginary in the 2nd degree"? *GRIN*
sqrt(-i) = exp(-PI/4) or exp(3PI/4). Not "purely imaginary" at all--the
real part is +/- sqrt(2)/2. It's as plain as a point on the unit circle.
You could double-check that if a = sqrt(2)/2 - sqrt(2)/2*i, or b=-a,
then a^2=b^2=-i. Simple trig and De Moivre's Theorem...
Bill