1. The problem statement, all variables and given/known data "A brass wire with Young's modulus of 9.1 1010 Pa is 2.1 m long and has a cross-sectional area of 4.6 mm2. If a weight of 5.0 kN is hung from the wire, by how much does it stretch?" The answer is to be given in cm. 2. Relevant equations I used the equation for Young's Modulus, YM = (F/A) / ([tex]\Delta[/tex]L/L0) 3. The attempt at a solution I looked at my given info first. YM = 9.1e10 Area = 4.6 mm2 = 0.46 cm2 Force = 5 kN = 5000 N L0 = 2.1 m = 2100 cm I converted all my units to cm because that's what the answer should be in. Then I plugged that info into my Young's Modulus equation: 9.1e10 = [(5000)/(0.46)] / [([tex]\Delta[/tex]L)/2100)] [tex]\Delta[/tex]L = (5000)(2100) / (.46)(9.1e10) [tex]\Delta[/tex]L = 2.5e-4 I thought I set this up right, but maybe I'm missing something.