AL wire

What is the weight of an aluminum wire 250 m long with a diameter of 2 mm, if the density of aluminum is p = 2700 kg/m cubic. Determine to the nearest gram.

Correct result:

m =  21 g


l=250 m D=2 mm cm=2/10  cm=0.2 cm ρ=2700 kg/m3 g/cm3=2700/1000  g/cm3=2.7 g/cm3  r=D/2=0.2/2=110=0.1 cm S=π r2=3.1416 0.120.0314 cm2 V=S l=0.0314 2507.854 cm3  m=ρ V=2.7 7.854=21 g

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