A. A string with a mass density μ = 4.10×10-3 kg/m is under a tension of F = 327 N and is fixed at both ends. One of its resonance frequencies is 742.0 Hz. The next higher resonance frequency is 1113.0 Hz. What is the fundamental frequency of this string?
B. Which harmonic does the resonance frequency at 742.0 Hz correspond to? (i.e. what is n at this frequency?)
C. What is the length of the string?
The Attempt at a Solution
So for A. I wanted to use the equation...
FF = 1/2L * sqrt(T/μ)
FF - fundamental frequency
μ = 4.10×10-3 kg/m
T = 327N
but I don't know what L is?