1. The problem statement, all variables and given/known data While attempting to tune the note C at 523 Hz, a piano tuner hears 2.00 beats/s between a reference oscillator and the string. (a) What are the possible frequencies of the string? (b) When she tightens the string slightly, she hears 3 beats/s What is the frequency of the string now? (c) By what percentage should the piano tuner now change the tension in the string to bring it into tune? 2. Relevant equations I'm not sure what equation to use for part b. freq= n/2L 3. The attempt at a solution For part (a) I found that the two possible frequencies are5 23 +/- 2 so 535 Hz or 521 Hz for part (b) I'm not sure how to get an actual value From what I understand...when the string is tightened its frequency increase since the beat frequency goes up, its becoming more out of tune.. (is this correct?) (I think I need part (b) to do (c)) Please help!! Thanks!!