Consider Three Types of Tubes Filled with Air: Closed, Open

question 34

Multiple Choice

Consider three types of tubes filled with air: closed, open, and half-closed. Assume that an external force is used to move (oscillate) a piston harmonically back and forth with an angular frequency, ù_ext, similar to the frequency of the first harmonic of the standing wave forming in the tube, ù_standing. Which tube will experience resonance (increase of amplitude of oscillations) ?

• A)only the closed and the half-closed pipes
• B)only the closed pipe
• C)only the half-closed pipe
• D)all three pipes

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