Physics
posted by Anonymous .
What is the resistance of a 4.00 m length of copper wire having a diameter of 2.00 mm at a temperature of 20 degrees?
R= ?
L= 4.00 m
resistivity= 1.72 * 10^8 ohmmeters
A= ?
A= pi*r^2
change 2 mm to .002m, square it and multiply by 3.14
I got .00001256
Is this right so far?
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