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A sound wave has a measured period of 2.5 ms and distance of 43 cm lying...

A sound wave has a measured period of 2.5 ms and distance of 43 cm lying between wave compressions and neighboring rarefactions.

a) Determine the speed of this wave.

b) If this wave passed from air into water, would its wavelength change? If so, how (increase or decrease) and why? If not, why not.

c)An observer measures a 450 Hz frequency for this sound wave. Assuming that the source is at rest, determine the observers speed.

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