Cu wire

Copper wire has a length l = 820 m and diameter d = 10 mm. Calculate the weight if density of copper is ρ = 8500 kg/m3. Result round to one decimal place.

Correct result:

m =  547.4 kg

Solution:

ρ=8500 kg/m3 l=820 m d=10 mm m=10/1000  m=0.01 m  S=π (d/2)2=3.1416 (0.01/2)20.0001 m2  V=S l=0.0001 8200.0644 m3  m=ρ V=8500 0.0644=547.4 kg



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