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? Please round to the nearest gram.

Correct answer:

m =  2121 g

Step-by-step explanation:

l=250 m cm=250 100  cm=25000 cm 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=101=0.1 cm S=π r2=3.1416 0.120.0314 cm2 V=S l=0.0314 25000785.3982 cm3  m=ρ V=2.7 785.3982=2121 g



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