106 Figure 17-50 shows a transmitter and receiver of waves con-tained in a single instrument. It is used to measure the speed u of atarget object (idealized as a flat plate) that is moving directly to-ward the unit, by analyzing the waves reflected from the target.What is u if the emitted frequency is 18.0 kHz and the detected fre-quency (of the returning waves) is 22.2 kHz?TargetFigure 17-50 Problem 106.

Basic Details The Doppler Effect is the change in the frequency due to the motion of either the…

Answered: 106 Figure 17-50 shows a transmitter…

College Physics

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ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter17: Physics Of Hearing

Section: Chapter Questions

Problem 31PE: (a) At an air show a jet flies directly toward the stands at a speed of 1200 km/h, emitting a...

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Engineering Application (a) A photovoltaic array of (solar cells) is 10.0% ef?cient in gathering solar energy and converting it to electricity. If the average intensity of sunlight on one day is 700W/m2, what area should your array have to gather energy at the rate of 100 W? (b) What is the maximum test of the array if it must pay for itself in two years of operation averaging 10.0 hours per day? Assume that it earns money at the rate of 9.00 (¢ per kilowatthour.
What frequency is received by a mouse just before being dispatched by a hawk flying at it at 25.0 m/s and emitting a screech of frequency 3500 Hz? Take the Speed of sound to be 331 m/s.
In Example 18.1, we investigated an oscillator at 1.3kHz driving two identical side-by-side speakers. We found that a listener at point O hears sound with maximum intensity, whereas a listener at point P hears a minimum. What is the intensity at P? (a) less than hut dose to the intensity at O (b) half the intensity at O (c) very low but not zero (d) zero (e) indeterminate
Energy from the Sun arrives at the top of Earth’s atmosphere with an intensity of 1400 W/m2. How long does it take for 1.80109 J to arrive on an area of 1.00 m2?
Calculate the first overtone in an ear canal, which resonates like a 2.40cmlong tube closed at one end, by taking air temperature to be 37.0°C. Is the ear particularly sensitive to such a frequency? (The resonances at the ear canal are complicated by its nonuniform shape, which we shall ignore.)
An astronomer measures the speed of recession of a remote galaxy to be 365 km/s using the Doppler principle According to the Hubble relation, about how far away is the galaxy?
An 8hour exposure to a sound intensity level of 90.0 dB may cause hearing damage. What energy in joules falls on a 0.800cmdiameter eardrum so exposed?
Assume a 150 W loudspeaker broadcasts sound equally in all directions and produces sound with a level of 103 dB at a distance of 1.60 m from its center. (a) Find its sound power output. If a salesperson claims the speaker is rated at 150. W, he is referring to the maximum electrical power input to the speaker. (b) Find the efficiency of the speaker, that is, the fraction of input power that is converted into useful output power.
(a) At an air show a jet flies directly toward the stands at a speed of 1200 km/h, emitting a frequency of 3500 Hz, on a day when the speed of sound is 342 m/s. What frequency is received by the observers? (b) What frequency do they receive as the plane flies directly away from them?
(a) What is the speed of sound in a medium where a 100kHz frequency produces a 5.96cm wavelength? (b) Which substance in Table 17.1 is this likely to be?
When poked by a spear, an operatic soprano lets out a 1200—Hz shriek. What is its wavelength if the speed of sound is 345 m/s?
Radio waves transmitted through empty space at the speed of light (v=c=3.00108m/s) by the Voyager spacecraft have a wavelength of 0.120 m. What is their frequency?

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