An organ pipe is open at both ends and has a length of 0.85m. It is set into oscillation in such a way that the air column inside vibrates in its sixth harmonic.
(a) State the boundary condition that exists at each end of an open organ pipe supporting longitudinal standing waves.
(b) Calculate the wavelength of sound corresponding to the sixth harmonic in the pipe.
(c) Determine the distance between two successive antinodes for this mode.
(d) Find the total number of nodes and antinodes that lie inside the pipe (do not count the ends themselves). Give reasons for your answer.