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A person jumps out of a helicopter in mid-air to retrieve a small metal ball. He...

A person jumps out of a helicopter in mid-air to retrieve a small metal ball. He screams at 456456 Hz, but people on the ground hear him scream at 567567 Hz.

1) The person is falling at ______ m/s.

Once he grabs the metal ball, he is pulled back up to the helicopter at the same speed as he was falling.

2) People on the ground now hear him scream at ______ Hz.

Take the speed of sound to be 343m/s.

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