John is listening to a horn. He knows the frequency of the horn is 300 Hz when b

Q: John is listening to a horn. He knows the frequency of the horn is 300 Hz when b

BCDF Basically, above said condition is only possible when the sound waves recived by john is less than what is being produced by horn(i.e, relative speed between horn & john is such that john is moving away from horn). And, this condition can be satisfied in options B,C,D & F.

ID: 1273214 • 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 270Hz, there are clearly several possibilities. Choose all possible options (e.g. ACE, B, AD, etc...) A) Both can be moving and have the same speed. B) John is moving away from the horn at rest. C) Both can be moving and have different speeds. D) Both can be moving, in opposite directions. E) The distance between John and the horn is decreasing with time. F) Both cannot be moving in the same direction.

Explanation / Answer

BCDF

Basically, above said condition is only possible when the sound waves recived by john is less than what is being produced by horn(i.e, relative speed between horn & john is such that john is moving away from horn). And, this condition can be satisfied in options B,C,D & F.

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John is listening to a horn. He knows the frequency of the horn is 300 Hz when b

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John is listening to a horn. He knows the frequency of the horn is 300 Hz when b

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