For the wave shown in figure, the frequency and wavelength, if its speed is 320 m/s are

Dear Student,
Please find below the solution to the asked query:

from the figure:
2.5 λ = 20 cm
λ = 8 cm.
v = ν​λ
v = velocity of wave
ν = frequency
λ = wavelength
320 = ν​×​8×​10-2
ν​ = 32000/8 = 4000 Hz.

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