A stretched string of length 1.5 m, fixed at both ends, emits a note of 450 Hz which is known to be its sixth harmonic.
Another pipe of unknown boundary conditions produces resonances at 450 Hz and 750 Hz but not at 600 Hz.
(a) Find the string’s fundamental frequency and wave speed.
(b) Identify the pipe type and its fundamental frequency.
(c) State the harmonic number for 750 Hz and sketch the displacement profile.