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magma_saber
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Homework Statement
A hanging wire made of an alloy of iron with diameter 0.09 cm is initially 2.2 m long. When a 66 kg mass is hung from it, the wire stretches an amount 1.12 cm. A mole of iron has a mass of 56 grams, and its density is 7.87 g/cm3.
Based on these experimental measurements, what is Young's modulus for this alloy of iron?
Homework Equations
Y = [tex]\frac{F/A}{dL/L}[/tex]
The Attempt at a Solution
What is F? Is it the mass of one mole times gravity?
F = 0.056kg x 9.8 m/s2
A = 2.54e-6
dL = 0.0112
L = 2.2