7th Edition

ISBN: 9780321625915

Author: Douglas C. Giancoli

Publisher: PEARSON

Concept explainers

A sound wave is a mechanical wave (or mechanical vibration) that transit through media such as gas (air), liquid (water), and solid (wood).

Quality Of Sound

A sound or a sound wave is defined as the energy produced due to the vibrations of particles in a medium. When any medium produces a disturbance or vibrations, it causes a movement in the air particles which produces sound waves. Molecules in the air vib…

Categories of Sound Wave

People perceive sound in different ways, like a medico student takes sound as vibration produced by objects reaching the human eardrum. A physicist perceives sound as vibration produced by an object, which produces disturbances in nearby air molecules th…

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Textbook Question

Chapter 12, Problem 91GP

A sound-insulating door reduces the sound level by 30 dB. What fraction of the sound intensity passes through this door?

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Chapter 12, Problem 90GP

Chapter 12, Problem 92GP

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Race car driver is cruising down the street at a constant speed of 28.9 m/s (~65 mph; he has a “lead” foot) when the traffic light in front of him turns red. a) If the driver’s reaction time is 160 ms, how far does he and his car travel down the road from the instant he sees the light change to the instant he begins to slow down? b) If the driver’s combined reaction and movement time is 750 ms, how far do he and his car travel down the road from the instant he sees the light change to the instant he slams on her brakes and car begins to slow down? Please answer parts a-B. Show all work. For each question draw a diagram to show the vector/s. Show all the step and provide units in the answers. Provide answer to 2 decimal places. DONT FORGET TO DRAW VECTORS! ONLY USE BASIC FORMULAS TAUGHT IN PHYSICS. distance = speed * time.

Race car driver is cruising down the street at a constant speed of 28.9 m/s (~65 mph; he has a “lead” foot) when the traffic light in front of him turns red. a) If the driver’s reaction time is 160 ms, how far does he and his car travel down the road from the instant he sees the light change to the instant he begins to slow down? b) If the driver’s combined reaction and movement time is 750 ms, how far do he and his car travel down the road from the instant he sees the light change to the instant he slams on her brakes and car begins to slow down? c) If the driver’s average rate of acceleration is -9.5 m/s2 as he slows down, how long does it take him to come to a stop (use information about his speed of 28.9 m/s but do NOT use his reaction and movement time in this computation)? Please answer parts a-c. Show all work. For each question draw a diagram to show the vector/s. Show all the step and provide units in the answers. Provide answer to 2 decimal places unless stated otherwise.…

How is it that part a is connected to part b? I can't seem to solve either part and don't see the connection between the two.

Chapter 12 Solutions

Physics

Ch. 12 - Prob. 1OQ Ch. 12 - Prob. 1Q Ch. 12 - Prob. 2Q Ch. 12 - Prob. 3Q Ch. 12 - When a sound wave passes from air into water, do...Ch. 12 - What evidence can you give that the speed of sound...Ch. 12 - Prob. 6Q Ch. 12 - How will the air temperature in a room affect the...Ch. 12 - Prob. 8Q Ch. 12 - Prob. 9Q

Ch. 12 - 10.A noisy truck approaches you from behind a...Ch. 12 - Prob. 11Q Ch. 12 - Prob. 12Q Ch. 12 - Traditional methods of protecting the hearing of...Ch. 12 - 14- Consider the two waves shown in Fig....Ch. 12 - Is there a Doppler shift if the source and...Ch. 12 - Prob. 16Q Ch. 12 - Prob. 17Q Ch. 12 - Prob. 1MCQ Ch. 12 - Prob. 2MCQ Ch. 12 - Prob. 3MCQ Ch. 12 - Prob. 4MCQ Ch. 12 - Prob. 5MCQ Ch. 12 - Prob. 6MCQ Ch. 12 - Prob. 7MCQ Ch. 12 - Prob. 8MCQ Ch. 12 - Prob. 9MCQ Ch. 12 - Prob. 10MCQ Ch. 12 - Prob. 11MCQ Ch. 12 - Prob. 12MCQ Ch. 12 - Prob. 13MCQ Ch. 12 - Prob. 1P Ch. 12 - Prob. 2P Ch. 12 - (a) Calculate the wavelengths in air at 20°C for...Ch. 12 - Prob. 4P Ch. 12 - An ocean fishing boat is drifting just above a...Ch. 12 - Prob. 6P Ch. 12 - Prob. 7P Ch. 12 - What is the intensity of a sound at the pain level...Ch. 12 - What is the sound level of a sound whose intensity...Ch. 12 - Prob. 10P Ch. 12 - Prob. 11P Ch. 12 - Prob. 12P Ch. 12 - One CD player is said to have a signal-to-noise...Ch. 12 - Prob. 14P Ch. 12 - At a rock concert, a dB meter registered 130 dB...Ch. 12 - Prob. 16P Ch. 12 - If the amplitude of a sound wave is made 3.5 times...Ch. 12 - Prob. 18P Ch. 12 - Prob. 19P Ch. 12 - Prob. 20P Ch. 12 - Prob. 21P Ch. 12 - Prob. 22P Ch. 12 - Prob. 23P Ch. 12 - Prob. 24P Ch. 12 - Prob. 25P Ch. 12 - Prob. 26P Ch. 12 - The A string on a violin has a fundamental...Ch. 12 - Prob. 28P Ch. 12 - (a) What resonant frequency would you expect from...Ch. 12 - If you were to build a pipe organ with open-tube...Ch. 12 - A tight guitar string has a frequency of 540 Hz as...Ch. 12 - Prob. 32P Ch. 12 - 33. (II) An unfingered guitar string is 0.68 m...Ch. 12 - Prob. 34P Ch. 12 - 35. (II) An organ is in tune at 22.0°C. By what...Ch. 12 - How far from the mouthpiece of the flute in...Ch. 12 - (a) At T= 22°C. how long must an open organ pipe...Ch. 12 - A particular organpipe can resonate at 264 Hz, 440...Ch. 12 - Prob. 39P Ch. 12 - Prob. 40P Ch. 12 - Prob. 41P Ch. 12 - Prob. 42P Ch. 12 - Prob. 43P Ch. 12 - The human ear canal is approximately 2.5 cm long....Ch. 12 - Prob. 45P Ch. 12 - Prob. 46P Ch. 12 - A certain dog whistle operates at 23.5 kHz. while...Ch. 12 - Prob. 48P Ch. 12 - A guitar string produces 3 beats/s when sounded...Ch. 12 - Prob. 50P Ch. 12 - Prob. 51P Ch. 12 - Prob. 52P Ch. 12 - Prob. 53P Ch. 12 - Prob. 54P Ch. 12 - Prob. 55P Ch. 12 - Prob. 56P Ch. 12 - Prob. 57P Ch. 12 - Prob. 58P Ch. 12 - As a bat flies toward a wall at a speed of 6.0...Ch. 12 - Prob. 60P Ch. 12 - Prob. 61P Ch. 12 - Prob. 62P Ch. 12 - Prob. 63P Ch. 12 - Prob. 64P Ch. 12 - Prob. 65P Ch. 12 - Prob. 66P Ch. 12 - Prob. 67P Ch. 12 - Prob. 68P Ch. 12 - Prob. 69P Ch. 12 - Prob. 70P Ch. 12 - Prob. 71GP Ch. 12 - Prob. 72GP Ch. 12 - Prob. 73GP Ch. 12 - Prob. 74GP Ch. 12 - Prob. 75GP Ch. 12 - Prob. 76GP Ch. 12 - Prob. 77GP Ch. 12 - Prob. 78GP Ch. 12 - Prob. 79GP Ch. 12 - Prob. 80GP Ch. 12 - Prob. 81GP Ch. 12 - Prob. 82GP Ch. 12 - Prob. 83GP Ch. 12 - Prob. 84GP Ch. 12 - Prob. 85GP Ch. 12 - Prob. 86GP Ch. 12 - Prob. 87GP Ch. 12 - A bat flies toward a moth at speed 7.8 m/s while...Ch. 12 - Prob. 89GP Ch. 12 - Two loudspeakers face each other at opposite ends...Ch. 12 - A sound-insulating door reduces the sound level by...Ch. 12 - Prob. 92GP Ch. 12 - Prob. 93GP Ch. 12 - Prob. 94GP Ch. 12 - Prob. 95GP Ch. 12 - Prob. 96GP

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