Cu wire

Copper wire has a length l = 980 m and diameter d = 8 mm. Calculate the weight if density of copper is ρ = 8500 kg/m3. Result round to one decimal place.

Correct result:

m =  418.7 kg

Solution:

m=Vρ=πr2lρ=π4d2lρ m=π40.0082⋅980⋅8500=418.7 kg

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