36. Go Suppose you are part of a team that is trying to break the soundbarrier with a jet-powered car, which means that it must travel faster thanthe speed of sound in air. In the morning, the air temperature is 0 °C, andthe speed of sound is 331 m/s. What speed must your car exceed if it isto break the sound barrier when the temperature has risen to 43 °C in theafternoon? Assume that air behaves like an ideal gas.

Given : T1 : 0 C or 273 K T2 : 430 C or 316 K c1 : 331 m/s

Answered: 36. Go Suppose you are part of a team…

College Physics

1st Edition

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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Similar questions

A dolphin (Fig. P17.7) in seawater at a temperature of 25C emits a sound wave directed toward the ocean floor 150 m below. How much time passes before it hears an echo?
(a) What is the speed of sound in a medium where a 100-kHz frequency produces a 5.96-cm wavelength? (b) Which substance in Table 17.1 is this likely to be?
. The frequency of middle C on the piano is 261.6 Hz. (a) What is the wavelength of sound with this frequency as it travels in air at room temperature? (b) What is the wavelength of sound with this frequency in water?
Dolphins make sounds in air and water. What is the ratio of the wavelength at a sound in air to its wavelength in seawater? Assume air temperature is 20.0°C.
Standing at the base of one of the cliffs of Mt. Arapiles in Victoria, Australia, a hiker hears a rock break loose from a height of 105.0 in. He can’t see the rock right away, but then does, 1.50 s later. (a) How far above the hiker is the rock when he can hear it? (b) How much time does he have to move before the rock hits his head?
(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 decibel level of a sound that is twice as intense as a 90.0dB sound? (b) What is the decibel level of a sound that is one—?fth as intense as a 90.0—dB sound?
(a) Ear trumpets were never very common, but they did aid people with hearing losses by gathering sound over a large area and concentrating it on the smaller area of the eardrum. What decibel increase does an ear trumpet produce it its sound gathering area is 900 cm2 and the area of the eardrum is 0.500 cm2, but the trumpet only has an eficiency of 5.00% in transmitting the sound to the eardrum? (b) Comment on the usefulness of the decibel increase found in part (a).
A tuning fork vibrates producing sound at a frequency of 512 Hz. The speed of sound of sound in air is v=343.00 m/s if the air is at a temperature of 20.00°C . What is the wavelength of the sound?
What is the minimum speed at which a source must travel toward you for you to be able to hear that its frequency is Doppler shifted? Thai is, what speed produces a shift of 0.300% on a day when the speed of sound is 331 m/s?
What is the intensity in watts per meter squared of 85.0dB sound?
(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?

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