1. The problem statement, all variables and given/known data A speaker is placed near the open end of a 0.5m pipe (closed on the other end). what is the speed of sound if the pipe resonances at 600Hz for n=2? 2. Relevant equations fn=(2n+1)*V/4L Or? fn=(2n-1)*V/4L 3. The attempt at a solution I saw both versions of the formulas above, which one is correct?