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**1. The problem statement, all variables and given/known data**

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?

**2. Relevant equations**

Y = [tex]\frac{F/A}{dL/L}[/tex]

**3. The attempt at a solution**

What is F? Is it the mass of one mole times gravity?

F = 0.056kg x 9.8 m/s

^{2}

A = 2.54e

^{-6}

dL = 0.0112

L = 2.2