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3. (6pts)(a) A train at rest emits a sound at a frequency of 1000Hz. An observer in a car travels towards the train at a speed of 30m/s. What is the frequency heard by the observer? (Take $v \approx 345 m/s$ sound speed) (6pts) (b) At rest, a car horn sounds the notes A (440Hz). The horn is sounded while the car is moving down the street. A bicyclist moving behind the car with one half the car's speed hears a frequency of 415Hz. What is the speed of the car? (Take $v \approx 345 m/s$ sound speed)

          3. (6pts)(a) A train at rest emits a sound at a frequency of 1000Hz. An observer in a car travels towards the train at a speed of 30m/s. What is the frequency heard by the observer?
(Take $v \approx 345 m/s$ sound speed)
(6pts) (b) At rest, a car horn sounds the notes A (440Hz). The horn is sounded while the car is moving down the street. A bicyclist moving behind the car with one half the car's speed hears a frequency of 415Hz. What is the speed of the car? (Take $v \approx 345 m/s$ sound speed)

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3. (6pts)(a) A train at rest emits a sound at a frequency of 1000Hz. An observer in a car travels towards the train at a speed of 30m/s. What is the frequency heard by the observer?
(Take v ≈ 345 m/s sound speed)
(6pts) (b) At rest, a car horn sounds the notes A (440Hz). The horn is sounded while the car is moving down the street. A bicyclist moving behind the car with one half the car's speed hears a frequency of 415Hz. What is the speed of the car? (Take v ≈ 345 m/s sound speed)

Added by William A.

University Physics with Modern Physics

Hugh D. Young 14th Edition

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3.6ptsaA train at rest emits a sound at a frequency of 1000Hz.An observer in a car travels towards (Takev345m/ssound speed) 6ptsb At rest,a car horn sounds the notes A 440Hz.The horn is sounded while the car is moving down the street. A bicyclist moving behind the car with one half the car's speed hears a frequency of 415Hz.What is the speed of the car?(Takev345m/s sound speed)

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