posted by Joan .
John is listening to a horn. He knows the frequency of the horn is 300 Hz when both he and the horn are at rest. If he hears a pitch of 330 Hz, there are clearly several possibilities. For each of the following statements, indicate whether it is correct or incorrect.
Both can be moving in the same direction at the same speed.
Both can be moving and have the same speed.
Both can be moving and have different speeds.
Both can be moving, in opposite directions.
The distance between John and the horn is increasing with time.
John is moving towards the horn at rest.