contestada

Which of the following scenarios would produce the Doppler Effect? Check all that
apply.

A moving sound source (such as an airplane passing overhead)

A moving observer of a source (such as a person running past a loud
stereo)

A moving source and moving observer (such as kids chasing an ice
cream truck that is playing music)

A non-moving source and non-moving observer (such as person
watching television on a couch)