Standing Waves in Open Tube - Third Harmonic · PhysicsBowl 2015 #18
Physics
Problem
A 680 Hz tuning fork is placed over a tube open at both ends that is filled with air. As a result, a standing wave in the 3rd harmonic is produced. The speed of sound in air is 340 sm. What is the length of the tube?
(A) 0.38 m
(B) 0.67 m
(C) 0.75 m
(D) 1.33 m
(E) 1.50 m