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A submarine sends a sound wave of frequency 3000Hz while moving away from a whale at...

A submarine sends a sound wave of frequency 3000Hz while moving away from a whale at 25 m/s. The whale hears the sound while chasing the submarine at 30 m/s. The speed of sound in the water is 1,500 m/s

a) Find the frequency of the sound heard by the whale.

ANS_________________________________________________

b) The whale passed the submarine and is moving away from it at 20 m/s. The submarine chases the whale at 10 m/s and sends a sound wave of frequency 3000Hz. Find the frequency of the sound heard by whale in this case.

ANS____________________________________________________

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