Copper Cu wire

Copper wire with a diameter of 1 mm and a weight of 350 g is wound on a spool. Calculate its length if the copper density is p = 8.9 g/cm cubic.

Correct answer:

l =  5007 cm

Step-by-step explanation:

D=1 mm cm=1:10  cm=0.1 cm m=350 g  ρ=8.9 g/cm3  m = ρ V V=m/ρ=350/8.9=89350039.3258 cm3  r=D/2=0.1/2=201=0.05 cm S=π r2=3.1416 0.0520.0079 cm2  V = Sl  l=V/S=39.3258/0.0079=5007 cm

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