It's Christmas time and you blast your Christmas music with the windows down in your car. Your grincny roommate hears your music 30 meters away. The final note in the song is a B, playing at 493 Hz, but your roommate smiles because to him it sounds like a B-flat, playing at 440 Hz. How fast are you driving relative to your roommate? And in what direction?
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- You are traveling at 38m/s toward oncoming car traveling at 28m/s toward you. Just before it reaches you, the car honks its horn at you. The frequency of the horn is 365Hz. What is the change in frequency of the horn as the car passes you?A spaceship is approaching a space station at a speed of 2.00 x 10° m/s. The space station has a beacon that emits green light with a frequency of 5.97 x 1014 Hz. (a) What is the frequency of the beacon observed on the spaceship? (Use c = 2.9979 × 10° m/s for the speed of light. Enter your answer to at least five significant figures.) Hz (b) What is the change in frequency? Hz Need Help? Read Itone way to tell if a mosquito is about to sting is to listen for the doppler shift as the mosquito is flying. the buzzing sound of a mosquito's wings is emmitted at a frequency of 1050 Hz. If you hear a frequency of 1034Hz, does this mean thatthe mosquito is coming in for a landing or that it has just bitten you and is flying away? At what velocity is the mosquito flying?
- A spectator at a parade receives an 888 Hz tone from an oncoming trumpeter who is playing an 881 Hz note. At what speed v., is the musician approaching if the speed of sound is 337 —? VS' m S 903 m S ! No, that's not the correct answer.You hear the sonic boom of a high-speed jet plane exactly 3.80 s after it passes directly overhead in level flight. At the time you hear the boom, you see the plane at an angle of 24.0 o above the horizon. Assume that the speed of sound at the altitude of the plane is 325 m/s. How fast is the plane traveling?What is the altitude of the plane?I am onstage at the Met. Not singing, of course: I am a supernumerary, a silent extra. Suddenly, the lights go out! I hear Lise Davidson sing her 10000 Hz high note, but, oddly, she is 100 Hz sharp. Is Lise running away from me or toward me? At what speed?
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- Early Doppler shift experiments were conducted using a band playing music on a train. A trumpet player on a moving railroad flatcar plays a 320-Hz note. The sound waves heard by a stationary observer on a train platform hears a frequency of 350 Hz. What is the flatcar’s speed in mph? The temperature of the air is TC = 22°C .At rest, a car’s horn sounds at a frequency of 550Hz. When the horn is sounded, while the car is moving down a street, a bicyclist moving at 8.50m/s in the direction opposite to the car hears a frequency of 575Hz. (a) What is the speed of the car? (b) If the cyclist slows down to 2.50m/s before passing the car, what is the new frequency detected by the cyclist? Assume that the car moves with the same speed, and that the speed of sound in air is 343m/s.You hear the sonic boom of a high-speed jet plane exactly 4.00 s after it passes directly overhead in level flight. At the time you hear the boom, you see the plane at an angle of 25.0 o above the horizon. Assume that the speed of sound at the altitude of the plane is 325 m/s. How fast is the plane traveling? What is the altitude of the plane?