Question #74ee1

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A08
Sep 3, 2016

The diameter of Copper wire is #0.040" in"#

Nearest AWG (American wire gauge, also known as the Brown & Sharpe wire gauge) is #18# which has diameter of #0.0403" in"#

Area of cross-section #=(pid^2)/4#
#=(pixx0.0403^2)/4=0.0013" in"^2#, rounded to four decimal places

Resistance of #100" ft length"=0.63697 Omega#
at temperature of #68^@"F" or 20^@"C"#. It is important to mention temperature as resistance changes with temperature.

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