1. The problem statement, all variables and given/known data A pipe has a length of 1 m. Determine the frequency of the ﬁrst harmonic if the pipe is open at each end. The velocity of sound in air is 343 m/s. Answer in units of Hz 2. Relevant equations f = v/2L 3. The attempt at a solution I just did another problem like this and got it right but for some reason I keep getting this wrong. I plugged in f = (343)/2(1) = 171.5. But this is wrong. Not sure what I'm supposed to do.