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An eagle flying at 37 m/s emits a cry whose frequency is 490 Hz. A blackbird...

An eagle flying at 37 m/s emits a cry whose frequency is 490 Hz. A blackbird is moving in the same direction as the eagle at 13 m/s. (Assume the speed of sound is 343 m/s.)

(a)

What frequency does the blackbird hear (in Hz) as the eagle approaches the blackbird?

Hz

(b)

What frequency does the blackbird hear (in Hz) after the eagle passes the blackbird?

Hz

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