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QUESTION 6 10 points The frequency of a train whistle is known to be 470 Hz....
A train whistle is heard at 300 Hz as the train approaches town. The train cuts...
A train whistle is heard at 300 Hz as the train approaches town. The train cuts its speed in half as it nears the station, and the sound of the whistle is then 290 Hz. What is the speed of the train after slowing down?
An alert physics student stands beside the tracks as a train rolls slowly past. He notes that the frequency of the train whistle is 464 Hz when the train is approaching him and 441 Hz when the train i...
An alert physics student stands beside the tracks as a train rolls slowly past. He notes that the frequency of the train whistle is 464 Hz when the train is approaching him and 441 Hz when the train is receding from him. Using these frequencies, he calculates the speed of the train. What value does he find? (Assume the speed of sound in air is 343 m/s.)
Item 4 Part A Constants | Periodic Table A train whistle is heard at 350 Hz...
Item 4 Part A Constants | Periodic Table A train whistle is heard at 350 Hz as the train approaches town. The train cuts its speed in half as it nears the station and the sound of the whistle is then 340 H What is the speed of the train before slowing down? Express your answer to two significant figures and include the appropriate units. Value Units Submit Part B What is the speed of the train after slowing down?...
A whistle of frequency 556 Hz moves in a circle of radius 57.6 cm at an...
A whistle of frequency 556 Hz moves in a circle of radius 57.6 cm at an angular speed of 16.4 rad/s. What are (a) the lowest and (b) the highest frequencies heard by a listener a long distance away, at rest with respect to the center of the circle? (Take the speed of sound in air to be 343 m/s.)
6) The sound from the whistle of a truck moving at 17.0 m/s toward a cliff...
6) The sound from the whistle of a truck moving at 17.0 m/s toward a cliff reflects from the cliff and is heard by the driver of the truck. When it is parked at the side of the road, the whistle from the truck produces sound of frequency 2.267 kHz. As observed by the driver of the truck, what is the change in frequency the sound from the whistle due to the reflection? The speed of sound is 343 m/s....
A train is moving at 23 m/s east when it blasts its horn at a frequency...
A train is moving at 23 m/s east when it blasts its horn at a frequency of 164 Hz. what frequency is heard by the driver of a car moving east at 15 m/s along a road parallel to the tracks? the speed of sound is 343 m/s.
phons 100 9 80 60 A 40 20 20 10k 1000 100 10 Frequency Hz) a) At approximately what frequency is the human ear most sensitive? How can you tell? b) If you heard a 300-Hz tone with a sound level of 60...
phons 100 9 80 60 A 40 20 20 10k 1000 100 10 Frequency Hz) a) At approximately what frequency is the human ear most sensitive? How can you tell? b) If you heard a 300-Hz tone with a sound level of 60 dB, approximately how many phons would you perceive? toward you with a speed v, starting a distance of 1 km away att 0. If the train moves very slowly (that is, v is extremely small compared to...
Two trains on separate tracks move toward each other. Train 1 has a speed of 113...
Two trains on separate tracks move toward each other. Train 1 has a speed of 113 km/h; train 2, a speed of 59.0 km/h. Train 2 blows its horn, emitting a frequency of 500 Hz. What is the frequency heard by the engineer on train 1? Hz A person wears a hearing aid that uniformly increases the intensity level of all audible frequencies of sound by 30.7 dB. The hearing aid picks up sound having a frequency of 250 Hz...
Sound Waves- In class Qui 1. What is the frequency heard by a person driving at...
Sound Waves- In class Qui 1. What is the frequency heard by a person driving at 15 m's toward a blowing factory whistle C the speed of sound is 340.6 m/s? (800. Hz) if 2. F rom the previous problem, what frequency would he hear after passing the factory if he continues at the same speed? 3. Determine the speed of a wave that is travelling with a frequency of 400Hz and has a wavelength of 45m. 4. A cop...
6)Two adjacent natural frequencies of an organ pipe are determined to be 912 Hz and 1008...
6)Two adjacent natural frequencies of an organ pipe are determined to be 912 Hz and 1008 Hz. (Assume the speed of sound is 343 m/s.) (a) Calculate the fundamental frequency of this pipe. Answer must be in Hz (b) Calculate the length of this pipe. Answer must be in m 7)A train sounds its horn as it approaches an intersection. The horn can just be heard at a level of 60 dB by an observer 10 km away. (a) What...
Item 4 Part A Constants | Periodic Table A train whistle is heard at 350 Hz as the train approaches town. The train cuts its speed in half as it nears the station and the sound of the whistle is then 340 H What is the speed of the train before slowing down? Express your answer to two significant figures and include the appropriate units. Value Units Submit Part B What is the speed of the train after slowing down?...
6) The sound from the whistle of a truck moving at 17.0 m/s toward a cliff reflects from the cliff and is heard by the driver of the truck. When it is parked at the side of the road, the whistle from the truck produces sound of frequency 2.267 kHz. As observed by the driver of the truck, what is the change in frequency the sound from the whistle due to the reflection? The speed of sound is 343 m/s....
phons 100 9 80 60 A 40 20 20 10k 1000 100 10 Frequency Hz) a) At approximately what frequency is the human ear most sensitive? How can you tell? b) If you heard a 300-Hz tone with a sound level of 60 dB, approximately how many phons would you perceive? toward you with a speed v, starting a distance of 1 km away att 0. If the train moves very slowly (that is, v is extremely small compared to...
Two trains on separate tracks move toward each other. Train 1 has a speed of 113 km/h; train 2, a speed of 59.0 km/h. Train 2 blows its horn, emitting a frequency of 500 Hz. What is the frequency heard by the engineer on train 1? Hz A person wears a hearing aid that uniformly increases the intensity level of all audible frequencies of sound by 30.7 dB. The hearing aid picks up sound having a frequency of 250 Hz...
Sound Waves- In class Qui 1. What is the frequency heard by a person driving at 15 m's toward a blowing factory whistle C the speed of sound is 340.6 m/s? (800. Hz) if 2. F rom the previous problem, what frequency would he hear after passing the factory if he continues at the same speed? 3. Determine the speed of a wave that is travelling with a frequency of 400Hz and has a wavelength of 45m. 4. A cop...
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