A speed boat approaches you on a lake, passes you, and then moves away.?

Question

A. How does the frequency of the sound of the motor change as the boat passes you?

B. Hoe does the sound of the boat change as it passes you?

Answer 1

The Doppler effect makes the boat noise frequencies higher during the approach, turn to exact real frequencies while the boat is at your side, then goes to lower frequencies while the boat goes away from you.

The sound of the boat changes due the Doppler effect.  The sound waves are compressed when it approaches you.  Compressing is the same as increasing frequency.  When the boat goes away, the sound pressure expands the sound waves, the same as lowering the frequencies.

Answer 2

frequency of it passing you ?

I thought u said it only went passed you once ??

Answer 3

The frequency should chance just the distance on how long it takes to reach u the sound will be louder since it has less tiem to disapate before u hear it

Answer 4

A.  Frequency is raised until it passes you, then it is lowered while it is going away from you.

B.  Volume increases as boat approaches, and decreases as it goes away.