1. The problem statement, all variables and given/known data A nylon tennis string on a racket is under a tension of 225 N. If its diameter is 0.97 mm, by how much is it lengthened from its untensioned length of 29.6 cm? Li= 29.6cm =.296 m r= 4.85e-4 m A= 7.389811319e-7 F= 225 N E= Young's Modulus for Nylon= 5 x 10^9 Solving for deltaL 2. Relevant equations A=pi(r)^2 F= E (delta L/Li) A 3. The attempt at a solution I've found the area and tried using the equation above but did not get a correct answer. I may well have messed up the calculations because that equation confuses me a little and I seem to be algebraically challenged this fine morning. All my incorrect answers so far are: 14.5e-8 cm 7.470483757e-8 cm 14.506204362e-7 cm 7.470483757e-6 cm (the last three answers came from the equation above) Any help is greatly appreciated! Thank you!