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Physics
Physics
Problem
1. What is the resistance per unit length of copper wire (resistivity
=
1.7
×
10
−
8
Ω
m
= 1.7 \times 10^{-8} \Omega \text{ m}
=
1.7
×
1
0
−
8
Ω
m
) of radius 4.0 mm?
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