<s>[INST] A doctor uses a stethoscope to auscultate the heart
sounds of a patient. The stethoscope is placed on the
apex of the patient’s heart. The stethoscope picks up
low-frequency vibrations that vary from 20-60 Hz. The
tube of the stethoscope is a cylinder with a length
(m) of 0.45 and a diameter (cm) of 0.60. What is the
fundamental frequency detected by the stethoscope?[/INST]