> And if you really enjoy this stuff (I do), dig up a copy of McConnell,
> "Applications of Tensor Analysis". Dot and cross products become
> trivial straight forward items. You even learn that the so-called cross
> product can only be represented by a vector in a three dimensional
That's how I think of it, a vector pointing out in 3-space from the point
where the two other two vectors are made to touch (tail to head). I can't
think of where I got that visualization, though (it was from a book). For
something like torque it is very intuitive. The dot product I think of as
something like the length of the shadow (cos theta) of one vector on the
other (it's just a scalar, of course).
P.S. To be pedantic, the dot product is only a vector in 3-d space if the
other two vectors were in 2-d space to begin with, but the visualization
is still very useful.
Spehro Pefhany --"it's the network..." "The Journey is the reward"
Embedded software/hardware/analog Info for designers: http://www.speff.com
Contributions invited->The AVR-gcc FAQ is at: http://www.BlueCollarLinux.com