The second overtone of an open pipe A and a closed pipe B have the same frequencies. The ratio of fundamental frequency of A to the fundamental frequency of B is:
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Question

The second overtone of an open pipe A and a closed pipe B have the same frequencies. The ratio of fundamental frequency of A to the fundamental frequency of B is:

G1 Physics · Accepted Answer

Step 1: The second overtone of an open pipe has frequency 3fₐ. The second overtone of a closed pipe has frequency 5fᵦ. Step 2: 3fₐ = 5fᵦ, hence fₐ/fᵦ = 5/3. Final: B.