A copper wire (density = 8.96 g/cm3) has a diameter of 0.46 mm.?

Question

If a sample of this copper wire has a mass of 18 g, how long is the wire in feet?

it's so simple but i can't figure out what i'm doing wrong!

Answer 1

V=18/8.96=2.009cm^3

V=h(pi)r2

0.46mm=.046cm

2.009=.046/2^2(pi)(h)

h=1208.812523cm

Answer 2

volume = mass / density = 18 / 8.96 = 2.009 cm^3

volume = length * cross sectional area

csa = pi * r^2 = pi * (0.046/2)^2 = 0.001662 cm^2

length = 2.009/0.001662 = 1208.8556 cm

2.54 cm = 1"

length = 1208.8556/2.54 = 475.93" = 39.66 ft  [about  39' 8"]

Answer 3

3 centimeters,its a trick question, look at the question again it tells you the lengh in the question.