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Re: [Phys-L] Conceptual Physics Course




On 2012, May 14, , at 13:57, John Clement wrote:

They don't think of graphical interpretation as math,
even though it certainly is math. The idea that algebra is overemphasized
is not nonsense. Students tend to just hunt for equations and rely on
algebra rather than thinking through the problem. So making them not use
algebra, or defer it is a very good pedagogical strategy.

On 2012, May 13, , at 15:26, John Denker wrote:

cut


Not a chance. sin and cos are 90 degrees out of phase.
The black and red power wires are 180 degrees out of phase.

The DC solution is easier and better than anything you could
do by fiddling with the AC phases.
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And bc searched for a trig. identity instead of drawing a graph of summing sinusoids squared; just a bit of thought woulda done it.