1. The problem statement, all variables and given/known data The frequency of a vibrating string is set to 15, 20, 25, 30, or 35 Hz and the length needed to attain a standing wave (mode 1) is recorded. A graph of frequency versus 1/L is recorded. Calculate the mass per unit length of the string. The resulting graph has the equation y=9.15x + 1.03 2. Relevant equations f= m/2L x (sqrt(T/mu)) m=1 T=tension= 1470 g m/s2 L=1m 3. The attempt at a solution I assumed it had something to do with the slope, which would be equal to 1/2L x sqrt(T/mu). That doesn't make solving for mu any easier though, so what's the point? If I set 9.15 equal to this, mu comes out to be 1.09 g/m, is this right? Gah, I'm so confused!