John is listening to a horn. He knows the frequency of the horn is 300 Hz when b
ID: 2120948 • Letter: J
Question
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 270 Hz, there are clearly several possibilities. For each of the following statements, indicate whether it is correct or incorrect.
+both can be moving, in opposite directions.
+John and the horn are both moving in the same direction but john is ahead and moving faster than the horn.
+Both can be moving and have different speeds.
+The distance between john and the horn is decreasing with time.
+john is moving away from the horn at rest.
+both can be moving and have the same speed.
Explanation / Answer
Correct Incorrect Both can be moving and have different speeds.
Correct Both can be moving, in opposite directions.
Correct Incorrect John is moving away from the horn at rest.
Correct Incorrect Both can be moving in the same direction at the same speed.
Incorrect The distance between John and the horn is decreasing with time.
Correct Both can be moving and have the same speed.
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