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) ??