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The sound source of a destroyer's sonar system operates at afrequency of 22.0 kHZ. The speed of sound in water is 1482 m/s.

(a) What is the wavelength of the emitted sound ?

(b) What is the difference in frequency between the directly radiated waves and thewaves reflected from a second submarine traveling directly towardthe first ship at 30.0 m/s ?

Note: the destroyer is at rest in the water.

what is (a) and (b) ??

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