document.write( "Question 308313: the electrical resistance of a wire directly with its length and inversely with the square of its radius. if a wire with radius 1.3 millimeter and length 14 meters has a resistance of 17 ohms, what will be the resistance of a wire with radius 0.8 millimeter and length 20 meters. \n" ); document.write( "
Algebra.Com's Answer #220435 by ankor@dixie-net.com(22740)\"\" \"About 
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the electrical resistance of a wire directly with its length and inversely with the square of its radius.
\n" ); document.write( "if a wire with radius 1.3 millimeter and length 14 meters has a resistance of 17 ohms, what will be the resistance of a wire with radius 0.8 millimeter and length 20 meters.
\n" ); document.write( ":
\n" ); document.write( "let k = the constant of the variation
\n" ); document.write( ":
\n" ); document.write( "R = \"%28L%2AK%29%2Fr%5E2\"
\n" ); document.write( ":
\n" ); document.write( "When R = 17 ohms
\n" ); document.write( "\"%2814%2AK%29%2F1.3%5E2\" = 17
\n" ); document.write( "\"%2814%2AK%29%2F1.69\" = 17
\n" ); document.write( "14K = 17 * 1.69
\n" ); document.write( "14k = 28.73
\n" ); document.write( "k = \"28.73%2F14\"
\n" ); document.write( "k = 2.052
\n" ); document.write( ":
\n" ); document.write( "Find R when L = 20, r = .8
\n" ); document.write( "R = \"%2820%2A2.052%29%2F.8%5E2\"
\n" ); document.write( "R = \"41.043%2F.64\"
\n" ); document.write( "R = 64.13 ohms \n" ); document.write( "
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