1. The problem statement, all variables and given/known data A 4.0g string of 0.67m length is vibrating at 300Hz in the third harmonic. The speed of sound in the air is 344 m/s. What is the tension in the string in SI units. A) 110 B) 88 C) 69 D) 130 E) 150 2. Relevant equations //frequency is equal to velocity over wavelength f = v/lambda 3. The attempt at a solution So, f sub n = nf sub 1, the fundamental frequency. That means that I can rewrite this using the frequency equation as... 100*2*L*sqrt(m/L) = sqrt(T) => 100*2*0.67*.0773 = sqrt(T) => 10.35 = sqrt(T) => (10.35)^2 = T => T = 107.2 107.2 is closest to 110, which is choice A, but it isn't exact and I didn't use the speed of sound in the air quantity for anything. I'm not sure if I did this problem correctly or not? Can anybody help? Thanks in advance.