Joe Nicholson writes in a message to Scott Huffman
 JN> Thus, the power companies use high voltage at low current in 
 JN> their  transmission lines to reduce IR losses, then steps it 
 JN> down for the  short distance run to a consumer wherever necessary. 
It's worse than "IR" - it's I SQUARED times R.  But you knew this, right?
  
(This formula was driven indelibly into my brain by a University of Minnesota 
Physics prof that referred to power loss in nearly all resistive cases by 
calling it "I squared R loss."  So, I *did* learn *something* in college!)
 
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