document.write( "Question 815401: The electrical resistance of a wire varies directly as its length and inversely as the square of its diameter. If a wire 50 feet long and 0.015 inch in diameter has a resistance of 3.5 ohms,what is the resistance of a wire of the same material 75 feet long and 0.025 inch in diameter? \n" ); document.write( "
Algebra.Com's Answer #490938 by TimothyLamb(4379)![]() ![]() You can put this solution on YOUR website! r = C(L + (1/D)^2) \n" ); document.write( "C = resistivity constant of the material \n" ); document.write( "--- \n" ); document.write( "3.5 = C(L + (1/D)^2) \n" ); document.write( "3.5 = C(50*12 + (1/0.015)^2) \n" ); document.write( "C = 3.5/5044.44444 \n" ); document.write( "C = 0.0006938326 \n" ); document.write( "--- \n" ); document.write( "r = C(75*12 + (1/0.025)^2) \n" ); document.write( "r = C(2500) \n" ); document.write( "r = 1.735 ohms \n" ); document.write( "--- \n" ); document.write( "Solve and graph linear equations: \n" ); document.write( "https://sooeet.com/math/linear-equation-solver.php \n" ); document.write( "--- \n" ); document.write( "Solve quadratic equations, quadratic formula: \n" ); document.write( "https://sooeet.com/math/quadratic-formula-solver.php \n" ); document.write( "--- \n" ); document.write( "Convert fractions, decimals, and percents: \n" ); document.write( "https://sooeet.com/math/fraction-decimal-percent.php \n" ); document.write( "--- \n" ); document.write( "Calculate and graph the linear regression of any data set: \n" ); document.write( "https://sooeet.com/math/linear-regression.php \n" ); document.write( " |