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An ambulance moving in still air at a constant speed of v, =135.0 km / h, on a straight road, has a horn that emits sound at a frequency fa=1450 Hz. Assume that the speed of sound in the still air is v= 350 m/ s. a.) What is the frequency f, of the sound heard by an observer standing still on the road as the ambulance approaches? b.) What is the wavelength, 2, of the sound in the still air directly in front of the ambulance as it is approaching? c.) What is the frequency f, of the sound heard by a moving observer moving directly toward the approaching ambulance at a speed v, = 95.0km / h?

An ambulance moving in still air at a constant speed of v, =135.0 km / h, on a straight road, has a horn that emits sound at a frequency fa=1450 Hz. Assume that the speed of sound in the still air is v= 350 m/ s. a.) What is the frequency f, of the sound heard by an observer standing still on the road as the ambulance approaches? b.) What is the wavelength, 2, of the sound in the still air directly in front of the ambulance as it is approaching? c.) What is the frequency f, of the sound heard by a moving observer moving directly toward the approaching ambulance at a speed v, = 95.0km / h?

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An ambulance moving in still air at a constant speed of v, =135.0 km / h, on a straight 5. road, has a horn that emits sound at a frequency f =1450 Hz. Assume that the speed of sound in the still air is v=350 m/s. a) What is the frequency fi of the sound heard by an observer standing still on the road as the ambulance approaches? b.) What is the wavelength, 4, of the sound in the still air directly in front of the ambulance as it is approaching? c.) What is the frequency f, of the sound heard by a moving observer moving directly toward the approaching ambulance at a speed v, = 95.0km / h? d.) Suppose that the sound from the ambulance is reflected off of a reflector moving directly toward the approaching ambulance at a speed v, -95.0km / h. Assuming that the sound can be heard, what is the frequency f, of the reflected sound wave heard by the ambulance driver?
Transcribed Image Text:An ambulance moving in still air at a constant speed of v, =135.0 km / h, on a straight 5. road, has a horn that emits sound at a frequency f =1450 Hz. Assume that the speed of sound in the still air is v=350 m/s. a) What is the frequency fi of the sound heard by an observer standing still on the road as the ambulance approaches? b.) What is the wavelength, 4, of the sound in the still air directly in front of the ambulance as it is approaching? c.) What is the frequency f, of the sound heard by a moving observer moving directly toward the approaching ambulance at a speed v, = 95.0km / h? d.) Suppose that the sound from the ambulance is reflected off of a reflector moving directly toward the approaching ambulance at a speed v, -95.0km / h. Assuming that the sound can be heard, what is the frequency f, of the reflected sound wave heard by the ambulance driver?
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