Tuning forks A, B and C are used. fₐ = 350 Hz. A and B produce 5 beats per second; B and C produce 4 beats per second. After adding wax to A, A and B produce 2 beats per second and A and C produce 6 beats per second. Find fᵦ and f꜀.
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Question

Tuning forks A, B and C are used. fₐ = 350 Hz. A and B produce 5 beats per second; B and C produce 4 beats per second. After adding wax to A, A and B produce 2 beats per second and A and C produce 6 beats per second. Find fᵦ and f꜀.

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G1 Physics · Accepted Answer

Step 1: Beat frequency is fᵦ = |f₁ − f₂|. Step 2: Use how loading, shortening, tension change or motion changes the unknown frequency. Step 3: Select the value consistent with the stated increase/decrease of beat frequency. Final: A: 345 Hz; 341 Hz or 349 Hz.