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Establish the relationship between speed of sound, its wavelength and frequency. If velocity of sound in air is 340 m s–1, calculate 

(i) wavelength when frequency is 256 Hz. 

(ii) frequency when wavelength is 0.85 m.

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Derivation of formula v = ν λ. 

(i) 340 = 256 λ 

                      λ = 1.33 m. 

(ii) 340 = ν (0.85) 

               ν = 400 Hz

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