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J89
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Homework Statement
Suppose that you wish to fabricate a uniform wire out of 1.00 g of copper. Assume the wire has a resistance R = 0.600 , and all of the copper is used.
What will be the diameter of the wire?
Homework Equations
A = V/l
R = sqrt(A/pi)
The Attempt at a Solution
For the volume I have gotten 1.12e-7 ( (1*10e-3)/8.92e3)=8.92e3 is the density of copper and it's 1 g of copper. and for the length, I have gotten 1.988.
For the diameter..
I divided the volume/length to get the area = 1.12e-7/1.988 = 5.63e-8
Then I used the formula r = sqrt(A/pi) = sqrt(5.63e-8/pi) = 1.34e-4
so diameter = 2 *r = 1.34e-4*2 = 2.68e-4, but I keep getting it wrong! Can someone explain what I'm doing wrong??