1. The problem statement, all variables and given/known data One end of a long pipe is open. The other end is closed by a piston, which can be moved along the pipe, varying its distance from the open end. Although the pipe is filled with air, the speed of sound under the conditions inside is yet to be determined. A speaker near the open end produces a pure 400 Hz frequency. Strong resonance is heard when the distances from the closed to the open end are 22.0, 67.0, and 112.0 cm. Determine the speed of sound in air under these conditions. The distances given reveal a situation that is not uncommon in real cases, in which the displacment antinode is actually a bit beyond the pipe's open end. Determine how far outside it is. 2. Relevant equations lambda=4L/n v=lambda*frequancy 3. The attempt at a solution I dont even know.