Julien,
your good coincidence here is only by chance (see my answer in 'corkscrew and speed of sound' in this forum). Here I compare the results of two techniques for a different graduated cylinder (100 mL):
The resonance frequency for the direct measurements was obtained by fitting the resonance curve, which is pretty good in this case.
your good coincidence here is only by chance (see my answer in 'corkscrew and speed of sound' in this forum). Here I compare the results of two techniques for a different graduated cylinder (100 mL):
The resonance frequency for the direct measurements was obtained by fitting the resonance curve, which is pretty good in this case.