Q: What determines the frequency of the emitted note in the standing wave equation F(A, L, n, c; x, t)?  

Answer: B

In the standing wave equation F(A, L, n, c; x, t), the speed of sound (c) determines the frequency of the emitted note. The frequency is inversely proportional to the wavelength, which is calculated as λ = 4L/(2n - 1).

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