Instasolv

IIT-JEE NEET CBSE NCERT Q&A

4.5/5

# Fundamentals of Physics Chapter 17 Solutions: Waves-II

Halliday Resnick and Walker Fundamentals of Physics Volume 1 Solutions for Chapter 17 ‘Waves – II’ are an ideal study material for IIT JEE and NEET Physics along with Class 12 board exams. ‘Waves-II’ of Fundamentals of Physics Volume 1 by Resnick Halliday & Walker will introduce you to the topics like sound waves, the speed of sound, travelling sound waves, interference, intensity and sound level, the variation of intensity with distance, sources of musical sound, beats, the doppler effect, supersonic speeds, and shock waves. The topics are explained with graphical information and diagrams so that you can understand all the content properly.

Whether it be the difference between longitudinal and transverse waves, the relationship between the speed of sound, the distance travelled by a sound wave, and the time required to travel that distance or other advanced level topics of the chapter, our solutions will help you form a solid foundation of this topic. Solutions of Resnick Halliday and Walker Physics Volume I can become difficult for you to find as the chapter has 9 modules with 111 questions. All of them are advanced-level questions appropriate to prepare for competitive exams like IIT JEE, NEET in a simplified manner.

Our professional team of subject matter experts works day and night for you to solve all your queries related to Resnick Halliday and Walker Physics book within the minimum possible time. Our team has prepared elaborated solutions for Resnick Halliday and Walker Physics Volume 1 ‘Waves-II’ so that you can understand them easily. Also, the team provides you with tips and tricks that help you in solving questions in a stepwise manner.

## Important Topics for Resnick Halliday & Walker Fundamentals of Physics Volume 1 Solutions Chapter 17: Waves- II

Sound Waves

Sound waves are a type of longitudinal mechanical wave that easily travels through the three states of matter- solids, liquids and gases. In the chapter, you will know how to find the speed of a sound wave in a medium that has bulk modulus and density. Also, you will know how to find the displacement of a sound wave.

Interference

This section will tell you about how two sound waves interfere. The interference of two sound waves depends on the phase difference when their identical wavelengths pass through a common point. The chapter will tell you about how the phase is calculated when the sound waves are emitted in-phase and are travelling in the same direction.

Sound Intensity

The intensity of a sound wave at a surface is the average rate per unit area at which energy is transferred by the wave through or onto the surface. To calculate sound intensity,

I= P/A, where P is the time rate of energy transfer of sound waves and A is the area of the surface intercepting the sound.

Also, you will know how the intensity is related to the displacement amplitude of a sound wave.

Sound levels in Decibels

Humans have a displacement amplitude of about 10-5 m for the loudest tolerable sound to about 10-11 m for the faintest detectable sound. Humans can easily hear over an enormous range of intensities. Thus, the intensity of the sound waves is called a sound level. The chapter will tell you how to find the sound level given its decibel.

Sources of Musical Sound

As the sound waves easily travel through the air in the pipe, they then get reflected at each end and travel back through the pipe. Under this section, you will know how the sound travels in a pipe through air and causes standing wave patterns. Also, the experiment in this section will tell you about different harmonics caused.

Beats

If you will listen after a few minutes to two sounds of frequencies like 552 and 564 hz, you will not be able to identify the difference between the two as they are close frequencies. But, as the sound reaches the ear, what you hear is a frequency of 558hz, which is the average of two frequencies. In this section, you will know how beats are the difference between the two combining frequencies.

### Exercise-Wise Discussion of Halliday Resnick and Walker Fundamentals of Physics Solutions Chapter 17: Waves-II

Module 1: Speed of Sound

This module has 8 questions in which you need to find out the speed of sound, the number of reflections, the length of medium in which sound travelled.

Module 2: Travelling Sound Waves

There are around 7 questions in this module where you need to find out the frequency of sound, displacement of sound, wavelength, pressure amplitude, and speed of the wave.

Module 3: Interference

There are a total of 7 questions in module 3 in which you will have to solve questions on phase difference, frequency, amplitude, the radius of the medium, and distance that sound travelled.

Module 4: Intensity and Sound Level

With 13 questions, this module has questions on topics like finding the sound level, the intensity of sound, the amplitude of air oscillations that a wave causes, what happens if pressure amplitude is increased or decreased, and power.

Module 5: Sources of Musical Sound

Module 5 has 12 questions in which you will be solving questions like finding the tension in the string, wavelength of waves, length of a pipe, frequency of the sound wave.

Module 6: Beats

This module contains only 4 questions in which you need to find the period and frequency of an instrument, increase/decrease in the tension of the wire.

Module 7: The Doppler Effect

Module 7 has a total of 12 questions where you will be solving questions like finding the doppler shift, speed of the sound, highest or lowest frequencies, wavelength, and frequency of sound waves.

Module 8: Supersonic Speeds, Shock Waves

This module has only 3 questions where you will give answers to questions like what is the speed of sound, finding the Mach cone angle, the altitude of a plane.