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Wave Equation. 
The wave equation is v = f x lambda. 
This can be rearranged to f = v / lambda. 
And lambda = v / f. 
Can you use one of the rearranged equations to solve this question? 
Question. 
A sound wave has a speed of 340 m/s and a frequency of 2kHz. What is the wavelength of the wave?

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