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As you stand near a railroad track, a train passes by at a speed of 30.1...
As you stand near a railroad track, a train passes by at a speed of 34.1...
As you stand near a railroad track, a train passes by at a speed of 34.1 m/s while sounding its horn at a frequency of 216 Hz. What frequency do you hear as the train approaches you and what frequency while it recedes? Take the speed of sound in air to be 344 m/s. approaching_____Hz receding______Hz
As you stand by the side of the road, a car approaches you at a constant...
As you stand by the side of the road, a car approaches you at a constant speed, sounding its horn, and you hear a frequency of 80.0 Hz. After the car goes by, you hear a frequency of 60.0 Hz. What is the speed of the car? Assume that he speed of sound in air is 343 m/s.
Doppler Effect You are waiting at a train station when an approaching express train sounds its...
Doppler Effect You are waiting at a train station when an approaching express train sounds its 400 Hz horn, warning everyone to stand back from the platform as it passes. If you perceive the frequency of the horn to be 425 Hz as the train approaches, how fast must the train be moving towards you? You may assume the speed of sound is 343 m/s.
A car is parked 20.0 m directly south of a railroad crossing. A train is approaching...
A car is parked 20.0 m directly south of a railroad crossing. A train is approaching the crossing from the west, headed directly east at a speed of 55.5 m/s. The train sounds a short blast of its 312-Hz horn when it reaches a point 20.0 m west of the crossing. What frequency does the car's driver hear when the horn blast reaches the car? The speed of sound in air is 343 m/s. (Hint: Assume that only the component...
A commuter train passes a passenger platform at a constant speed of 41.7 m/s. The train...
A commuter train passes a passenger platform at a constant speed of 41.7 m/s. The train horn is sounded at its characteristic frequency of 350 Hz. (a) What overall change in frequency is detected by a person on the platform as the train moves from approaching to receding? (Indicate whether the frequency increases of decreases with the sign of your answer.) Hz (b) What wavelength is detected by a person on the platform as the train approaches?
A commuter train passes a passenger platform at a constant speed of 37.5 m/s. The train...
A commuter train passes a passenger platform at a constant speed of 37.5 m/s. The train horn is sounded at its characteristic frequency of 320 Hz. (a) What overall change in frequency is detected by a person on the platform as the train moves from approaching to receding? (Indicate whether the frequency increases of decreases with the sign of your answer.) Hz (b) What wavelength is detected by a person on the platform as the train approaches?
A commuter train passes a passenger platform at a constant speed of 35.9 m/s. The train...
A commuter train passes a passenger platform at a constant speed of 35.9 m/s. The train horn is sounded at its characteristic frequency of 340 Hz. (a) What overall change in frequency is detected by a person on the platform as the train moves from approaching to receding? (Indicate whether the frequency increases of decreases with the sign of your answer.) Incorrect: Your answer is incorrect. Your response differs from the correct answer by more than 100%. Hz (b) What...
A railroad train is traveling at 28.0 m/s in still air. The frequency of the note...
A railroad train is traveling at 28.0 m/s in still air. The frequency of the note emitted by the train whistle is 256 Hz . The speed of sound is 344 m/s. A) What frequency is heard by a passenger on a train moving in the opposite direction to the first at 18.0 m/sm/s and approaching the first? B) What frequency is heard by a passenger on a train moving in the opposite direction to the first at 18.0 m/sm/s...
You are driving a massive truck and become stuck at a railway crossing. Your truck completely...
You are driving a massive truck and become stuck at a railway crossing. Your truck completely blocks the railway tracks, which extend in a straight line in both directions. You hear a train approaching when it toots its horn. (a) Let /1 be the intensity of the sound you hear from the horn initially, and 12-70 dB the sound when the train is at half the original distance. ) Calculate the intensity of the horn, 11, in dB. i) Calculate...
12.3 (a) In which of these scenarios do you hear a higher pitched sound? Explain speed...
12.3 (a) In which of these scenarios do you hear a higher pitched sound? Explain speed vo you at speed vo (i) A train with its horn sounding is stationary and you move directly towards it with a (ii) You stationary and the same train is sounding its horn as it moves directly towards (b) What is the difference in pitch between the above two scenarios if vo-30 m/s, the frequency of the train horn is 800 Hz and the...
A commuter train passes a passenger platform at a constant speed of 41.7 m/s. The train horn is sounded at its characteristic frequency of 350 Hz. (a) What overall change in frequency is detected by a person on the platform as the train moves from approaching to receding? (Indicate whether the frequency increases of decreases with the sign of your answer.) Hz (b) What wavelength is detected by a person on the platform as the train approaches?
You are driving a massive truck and become stuck at a railway crossing. Your truck completely blocks the railway tracks, which extend in a straight line in both directions. You hear a train approaching when it toots its horn. (a) Let /1 be the intensity of the sound you hear from the horn initially, and 12-70 dB the sound when the train is at half the original distance. ) Calculate the intensity of the horn, 11, in dB. i) Calculate...
12.3 (a) In which of these scenarios do you hear a higher pitched sound? Explain speed vo you at speed vo (i) A train with its horn sounding is stationary and you move directly towards it with a (ii) You stationary and the same train is sounding its horn as it moves directly towards (b) What is the difference in pitch between the above two scenarios if vo-30 m/s, the frequency of the train horn is 800 Hz and the...
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