Cu wire

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

Correct answer:

m =  547.4 kg

Step-by-step explanation:

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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