You are a passenger on a hot-air balloon that is rising with constant velocity, and you are carrying a buzzer that emits a sound of frequency f. If you accidentally drop the buzzer from
the balloon, what will happen to the sound you hear as it falls towards the ground?
The frequency decreases and the intensity increases.
The frequency decreases and the intensity decreases.
The frequency remains the same but the intensity decreases.
The frequency and intensity increase.
Explain.