6. The frequency of a tornado siren is 600 Hz. If a cyclist is movingtoward the siren at 12 m/s in 15 °C air,which has a speed of sound of 340m/s, what is the frequency that the cyclist observes?Your answer

Answered: 6. The frequency of a tornado siren is…

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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1. Like most dolphins, "Sparky the Wonder Dolphin" uses echolocation (or sonar) by emitting high frequency "clicks" to locate objects in the water around her. Typical frequency of a dolphin's sonar click is 100 kHz, while the typical intensity of a sonar click at a distance of 1 m from a dolphin's head is 200 dB. The speed of sound in sea water is about 1520 m/s. If Sparky emits a sonar click that bounces off a school of tuna 20 km distant, a) how long must she wait to hear the reflected pulse, and b) what is the intensity in dB of the reflected pulse that she hears?
4. You pick up an empty 16 oz. plastic coke bottle and blow a steady airstream over the top edge of the bottle's mouth to set the air in the bottle into resonance. What is the frequency of the 1" mode for the bottle? (Hint: you'll need a metric ruler for this question). 5. The Empire State Building in NYC is approximately 440 meters in height. The superstructure of the building is made of steel which means that energy will be transmitted through the buildings core at 1500 m/sec. If the building is being blasted and buffeted by a strong wind storm, at what frequency will the building sway in it's 1st mode of vibration. (Hint: think about what type of a resonator a building could be)
10. If the intensity for 5 bugs is 6 x 10-12 W/m² then what is the intensity for 1 bug? For 3 bugs? 11. If 1 bug makes a sound of 8 dB then what will 25 bugs sound like? 12. If 4 bugs make a sound of 14 dB then what will 25 bugs sound like?
1. A car is blowing its horn (f = 285Hz) while driving away from you at 18.0m/s. The air temperature is -12.0°C. a) What frequency do you hear? b) How fast would the car have to drive, and in what direction, for you to hear a frequency of 356Hz?
A ball travels to Isan at 4.62 m/s. Isan kicks the ball with a force of 32.6 N for a duration of 1.243 s, resulting in the ball moving at 20.57 m/s. Compute the momentum of a car with a mass of 690 kg and a velocity of 135 m/s.
A bird is flying directly toward a stationary bird-watcher and emits a frequency of 1.09 × 10³ Hz. The bird-watcher, however, hears a frequency of 1.17 × 103 Hz. What is the speed of the bird, expressed as a percentage of the speed of sound? Number i eTextbook and Media Save for Later 7 # C $ Units וום Attempts: 0 of 3 used Submit Answer 8 E Apr 30 5
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Tornado Siren. The frequency of a tornado siren is 920 Hz. If a cyclist is moving toward the siren at 10 m/s in 15 °C air, which has a speed of sound of 340 m/s, what is the frequency that the cyclist observes?
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1 A train approaching a hill at a speed of 40 km/hr sound a whistle of frequency 580HZ when it is at a distance of 1 km from the hill. A wind with a speed of 40 km per hour is blowing in the direction of motion of the train. Find: (a) Frequency of whistle as heard by an observer on the hill.
10. Dr. Senkov while driving his old 1996 Chevy Lumina approaches a police car on the side of the road. The Lumina was speeding at 55 m/s (123 mph) so the police car turns on its siren. If the frequency of the sound that the police car emits is 590 Hz, what frequency does Dr. Senkov hear (while approaching the cop car that is at rest)? The speed of sound is 337 m/s (it is pretty cold there). A. 607 Hz B. 635 Hz C. 658 Hz D. 671 Hz E. 686 Hz
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6. The frequency of a tornado siren is 600 Hz. If a cyclist is moving toward the siren at 12 m/s in 15 °C air,which has a speed of sound of 340 m/s, what is the frequency that the cyclist observes? Your answer