# Mechanical Waves. Chapter 15. PowerPoint Lectures for University Physics, Thirteenth Edition Hugh D. Young and Roger A. Freedman

Save this PDF as:

Size: px
Start display at page:

Download "Mechanical Waves. Chapter 15. PowerPoint Lectures for University Physics, Thirteenth Edition Hugh D. Young and Roger A. Freedman"

## Transcription

1 Chapter 15 Mechanical Waves PowerPoint Lectures for University Physics, Thirteenth Edition Hugh D. Young and Roger A. Freedman Lectures by Wayne Anderson

2 Goals for Chapter 15 To study the properties and varieties of mechanical waves To relate the speed, frequency, and wavelength of periodic waves To interpret periodic waves mathematically To calculate the speed of a wave on a string To calculate the energy of mechanical waves To understand the interference of mechanical waves To analyze standing waves on a string To investigate the sound produced by stringed instruments

3 Introduction Earthquake waves carry enormous power as they travel through the earth. Other types of mechanical waves, such as sound waves or the vibration of the strings of a piano, carry far less energy. Overlapping waves interfere, which helps us understand musical instruments.

4 Types of mechanical waves A mechanical wave is a disturbance traveling through a medium. Figure 15.1 below illustrates transverse waves and longitudinal waves.

5 Periodic waves For a periodic wave, each particle of the medium undergoes periodic motion. The wavelength of a periodic wave is the length of one complete wave pattern. The speed of any periodic wave of frequency f is v = f.

6 Q15.1 If you double the wavelength of a wave on a string, what happens to the wave speed v and the wave frequency f? A. v is doubled and f is doubled. B. v is doubled and f is unchanged. C. v is unchanged and f is halved. D. v is unchanged and f is doubled. E. v is halved and f is unchanged.

7 A15.1 If you double the wavelength of a wave on a string, what happens to the wave speed v and the wave frequency f? A. v is doubled and f is doubled. B. v is doubled and f is unchanged. C. v is unchanged and f is halved. D. v is unchanged and f is doubled. E. v is halved and f is unchanged.

8 Periodic transverse waves For the transverse waves shown here in Figures 15.3 and 15.4, the particles move up and down, but the wave moves to the right.

9 Periodic longitudinal waves For the longitudinal waves shown here in Figures 15.6 and 15.7, the particles oscillate back and forth along the same direction that the wave moves. Follow Example 15.1.

10 Mathematical description of a wave The wave function, y(x,t), gives a mathematical description of a wave. In this function, y is the displacement of a particle at time t and position x. The wave function for a sinusoidal wave moving in the +x-direction is y(x,t) = Acos(kx t), where k = 2π/ is called the wave number. Figure 15.8 at the right illustrates a sinusoidal wave.

11 Q15.2 Which of the following wave functions describe a wave that moves in the x-direction? A. y(x,t) = A sin ( kx t) B. y(x,t) = A sin (kx + t) C. y(x,t) = A cos (kx + t) D. both B. and C. E. all of A., B., and C.

12 A15.2 Which of the following wave functions describe a wave that moves in the x-direction? A. y(x,t) = A sin ( kx t) B. y(x,t) = A sin (kx + t) C. y(x,t) = A cos (kx + t) D. both B. and C. E. all of A., B., and C.

13 Graphing the wave function The graphs in Figure 15.9 to the right look similar, but they are not identical. Graph (a) shows the shape of the string at t = 0, but graph (b) shows the displacement y as a function of time at t = 0. Refer to Problem-Solving Strategy Follow Example 15.2.

14 Particle velocity and acceleration in a sinusoidal wave The graphs in Figure below show the velocity and acceleration of particles of a string carrying a transverse wave.

15 Q15.3 A wave on a string is moving to the right. This graph of y(x, t) versus coordinate x for a specific time t shows the shape of part of the string at that time. 0 y a x At this time, what is the velocity of a particle of the string at x = a? A. The velocity is upward. B. The velocity is downward. C. The velocity is zero. D. not enough information given to decide

16 A15.3 A wave on a string is moving to the right. This graph of y(x, t) versus coordinate x for a specific time t shows the shape of part of the string at that time. 0 y a x At this time, what is the velocity of a particle of the string at x = a? A. The velocity is upward. B. The velocity is downward. C. The velocity is zero. D. not enough information given to decide

17 Q15.4 A wave on a string is moving to the right. This graph of y(x, t) versus coordinate x for a specific time t shows the shape of part of the string at that time. 0 y a x At this time, what is the acceleration of a particle of the string at x = a? A. The acceleration is upward. B. The acceleration is downward. C. The acceleration is zero. D. not enough information given to decide

18 A15.4 A wave on a string is moving to the right. This graph of y(x, t) versus coordinate x for a specific time t shows the shape of part of the string at that time. 0 y a x At this time, what is the acceleration of a particle of the string at x = a? A. The acceleration is upward. B. The acceleration is downward. C. The acceleration is zero. D. not enough information given to decide

19 Q15.5 A wave on a string is moving to the right. This graph of y(x, t) versus coordinate x for a specific time t shows the shape of part of the string at that time. 0 y b x At this time, what is the velocity of a particle of the string at x = b? A. The velocity is upward. B. The velocity is downward. C. The velocity is zero. D. not enough information given to decide

20 A15.5 A wave on a string is moving to the right. This graph of y(x, t) versus coordinate x for a specific time t shows the shape of part of the string at that time. 0 y b x At this time, what is the velocity of a particle of the string at x = b? A. The velocity is upward. B. The velocity is downward. C. The velocity is zero. D. not enough information given to decide

21 Q15.6 A wave on a string is moving to the right. This graph of y(x, t) versus coordinate x for a specific time t shows the shape of part of the string at that time. At this time, the velocity of a particle on the string is upward at A. only one of points 1, 2, 3, 4, 5, and 6. B. point 1 and point 4 only. C. point 2 and point 6 only. D. point 3 and point 5 only. E. three or more of points 1, 2, 3, 4, 5, and 6.

22 A15.6 A wave on a string is moving to the right. This graph of y(x, t) versus coordinate x for a specific time t shows the shape of part of the string at that time. At this time, the velocity of a particle on the string is upward at A. only one of points 1, 2, 3, 4, 5, and 6. B. point 1 and point 4 only. C. point 2 and point 6 only. D. point 3 and point 5 only. E. three or more of points 1, 2, 3, 4, 5, and 6.

23 The speed of a wave on a string Follow the first method using Figure above. Follow the second method using Figure at the right. F The result is v.

24 Q15.7 Two identical strings are each under the same tension. Each string has a sinusoidal wave with the same average power P av. If the wave on string #2 has twice the amplitude of the wave on string #1, the wavelength of the wave on string #2 must be A. 4 times the wavelength of the wave on string #1. B. twice the wavelength of the wave on string #1. C. the same as the wavelength of the wave on string #1. D. 1/2 of the wavelength of the wave on string #1. E. 1/4 of the wavelength of the wave on string #1.

25 A15.7 Two identical strings are each under the same tension. Each string has a sinusoidal wave with the same average power P av. If the wave on string #2 has twice the amplitude of the wave on string #1, the wavelength of the wave on string #2 must be A. 4 times the wavelength of the wave on string #1. B. twice the wavelength of the wave on string #1. C. the same as the wavelength of the wave on string #1. D. 1/2 of the wavelength of the wave on string #1. E. 1/4 of the wavelength of the wave on string #1.

26 Calculating wave speed Follow Example 15.3 and refer to Figure below.

27 Q15.8 The four strings of a musical instrument are all made of the same material and are under the same tension, but have different thicknesses. Waves travel A. fastest on the thickest string. B. fastest on the thinnest string. C. at the same speed on all strings. D. not enough information given to decide

28 A15.8 The four strings of a musical instrument are all made of the same material and are under the same tension, but have different thicknesses. Waves travel A. fastest on the thickest string. B. fastest on the thinnest string. C. at the same speed on all strings. D. not enough information given to decide

29 Power in a wave A wave transfers power along a string because it transfers energy. The average power is proportional to the square of the amplitude and to the square of the frequency. This result is true for all waves. Follow Example 15.4.

30 Wave intensity The intensity of a wave is the average power it carries per unit area. If the waves spread out uniformly in all directions and no energy is absorbed, the intensity I at any distance r from a wave source is inversely proportional to r 2 : I 1/r 2. (See Figure at the right.) Follow Example 15.5.

31 Boundary conditions When a wave reflects from a fixed end, the pulse inverts as it reflects. See Figure 15.19(a) at the right. When a wave reflects from a free end, the pulse reflects without inverting. See Figure 15.19(b) at the right.

32 Wave interference and superposition Interference is the result of overlapping waves. Principle of superposition: When two or more waves overlap, the total displacement is the sum of the displacements of the individual waves. Study Figures and at the right.

33 Standing waves on a string Waves traveling in opposite directions on a taut string interfere with each other. The result is a standing wave pattern that does not move on the string. Destructive interference occurs where the wave displacements cancel, and constructive interference occurs where the displacements add. At the nodes no motion occurs, and at the antinodes the amplitude of the motion is greatest. Figure on the next slide shows photographs of several standing wave patterns.

34 Photos of standing waves on a string Some time exposures of standing waves on a stretched string.

35 The formation of a standing wave In Figure 15.24, a wave to the left combines with a wave to the right to form a standing wave. Refer to Problem- Solving Strategy 15.2 and follow Example 15.6.

36 Normal modes of a string For a taut string fixed at both ends, the possible wavelengths are n = 2L/n and the possible frequencies are f n = n v/2l = nf 1, where n = 1, 2, 3, f 1 is the fundamental frequency, f 2 is the second harmonic (first overtone), f 3 is the third harmonic (second overtone), etc. Figure illustrates the first four harmonics.

37 Standing waves and musical instruments A stringed instrument is tuned to the correct frequency (pitch) by varying the tension. Longer strings produce bass notes and shorter strings produce treble notes. (See Figure below.) Follow Examples 15.7 and 15.8.

38 Q15.9 While a guitar string is vibrating, you gently touch the midpoint of the string to ensure that the string does not vibrate at that point. The lowest-frequency standing wave that could be present on the string A. vibrates at the fundamental frequency. B. vibrates at twice the fundamental frequency. C. vibrates at 3 times the fundamental frequency. D. vibrates at 4 times the fundamental frequency. E. not enough information given to decide

39 A15.9 While a guitar string is vibrating, you gently touch the midpoint of the string to ensure that the string does not vibrate at that point. The lowest-frequency standing wave that could be present on the string A. vibrates at the fundamental frequency. B. vibrates at twice the fundamental frequency. C. vibrates at 3 times the fundamental frequency. D. vibrates at 4 times the fundamental frequency. E. not enough information given to decide

### Sinusoidal Waves. Sinusoidal Waves. Sinusoidal Waves

Sinusoidal Waves A wave source at x = 0 that oscillates with simple harmonic motion (SHM) generates a sinusoidal wave. 2017 Pearson Education, Inc. Slide 16-1 Sinusoidal Waves Above is a history graph

### Slide 2 / 28 Wave Motion. A wave travels along its medium, but the individual particles just move up and down.

Slide 1 / 28 Waves Slide 2 / 28 Wave Motion A wave travels along its medium, but the individual particles just move up and down. Slide 3 / 28 Wave Motion All types of traveling waves transport energy.

### Physics Mechanics

1 Physics 170 - Mechanics Lecture 33 Waves Wave notion 2 A wave pulse is a disturbance that propagates through a medium. It transfers energy without transferring matter; the energy is a combination of

### Chapter 15 Wave Motion. Copyright 2009 Pearson Education, Inc.

Chapter 15 Wave Motion 15-1 Characteristics of Wave Motion All types of traveling waves transport energy. Study of a single wave pulse shows that it is begun with a vibration and is transmitted through

### Waves Multiple Choice

Waves Multiple Choice PSI Physics Name: 1. The distance traveled by a wave in one period is called? A. Frequency B. Period C. Speed of wave D. Wavelength E. Amplitude 2. Which of the following is the speed

### Sound waves... light waves... water waves...

Sound waves... light waves... water waves... 1S-13 Slinky on Stand Creating longitudinal compression waves in a slinky What happens when you pull back and release one end of the slinky? 4/11/2011 Physics

### Slide 1 / The distance traveled by a wave in one period is called? Frequency Period Speed of wave Wavelength Amplitude

Slide 1 / 20 1 The distance traveled by a wave in one period is called? Frequency Period Speed of wave Wavelength mplitude Slide 2 / 20 2 Which of the following is the speed of a wave traveling with a

### Chs. 16 and 17 Mechanical Waves

Chs. 16 and 17 Mechanical Waves The nature of waves A wave is a traveling disturbance that carries energy from one place to another, and even though matter may be disturbed as a wave travels through a

### LECTURE OUTLINE CHAPTER 14

1 LECTURE OUTLINE CHAPTER 14 Waves and Sound 14-1 Types of Waves 2 A wave: Is a disturbance that propagates from one place to another. 1- Transverse Wave: The displacement of the medium is perpendicular

### Question. A. Incorrect! Check the definition for period. B. Incorrect! Check the definition for speed.

AP Physics - Problem Drill 11: Vibrations and Waves. Instruction: (1) Read the problem statement and answer choices carefully (2) Work the problems on paper as 1. The following definitions are used to

### Lecture Outline Chapter 14. Physics, 4 th Edition James S. Walker. Copyright 2010 Pearson Education, Inc.

Lecture Outline Chapter 14 Physics, 4 th Edition James S. Walker Chapter 14 Waves and Sound Units of Chapter 14 Types of Waves Waves on a String Harmonic Wave Functions Sound Waves Sound Intensity The

### i-clicker Discussion Question

PHY132 Introduction to Physics II Class Class 3 Outline: Outline: Ch. 21, sections 21.1-21.4 The Principle of Superposition Standing Waves Nodes and Antinodes Musical Instruments QuickCheck 1.1 i-clicker

### Units of Chapter 14. Types of Waves Waves on a String Harmonic Wave Functions Sound Waves Standing Waves Sound Intensity The Doppler Effect

Units of Chapter 14 Types of Waves Waves on a String Harmonic Wave Functions Sound Waves Standing Waves Sound Intensity The Doppler Effect Units of Chapter 14 Optional Superposition and Interference Beats

### Vibrations are the sources of waves. A vibration creates a disturbance in a given medium, that disturbance travels away from the source, carrying

Vibrations are the sources of waves. A vibration creates a disturbance in a given medium, that disturbance travels away from the source, carrying energy with it, we call this traveling disturbance a wave.

### SPH3U Sec.9.2.notebook. November 30, Free End Reflections. Section 9.2 Waves at Media Boundaries

Section 9.2 Waves at Media Boundaries Wave speed depends on some of the properties of the medium through which the wave is travelling. For example, the speed of sound in air depends on air temperature,

### Chapter 11 Waves. Waves transport energy without transporting matter. The intensity is the average power per unit area. It is measured in W/m 2.

Energy can be transported by particles or waves: Chapter 11 Waves A wave is characterized as some sort of disturbance that travels away from a source. The key difference between particles and waves is

### i-clicker Discussion Question

PHY132 Introduction to Physics II Class Class 3 Outline: Outline: Ch. 21, sections 21.1-21.4 The Principle of Superposition Standing Waves Nodes and Antinodes Musical Instruments QuickCheck 1.1 i-clicker

### Harmonics and Sound Exam Review

Name: Class: _ Date: _ Harmonics and Sound Exam Review Multiple Choice Identify the letter of the choice that best completes the statement or answers the question. 1. Which of the following is not an example

### PHYS 102 Quiz Problems Chapter 16 : Waves I Dr. M. F. Al-Kuhaili

PHYS 102 Quiz Problems Chapter 16 : Waves I Dr. M. F. Al-Kuhaili 1. (TERM 001) A sinusoidal wave traveling in the negative x direction has amplitude of 20.0 cm, a wavelength of 35.0 cm, and a frequency

### Waves & Interference

Waves & Interference I. Definitions and Types II. Parameters and Equations III. Sound IV. Graphs of Waves V. Interference - superposition - standing waves The student will be able to: HW: 1 Define, apply,

### Preview. Vibrations and Waves Section 1. Section 1 Simple Harmonic Motion. Section 2 Measuring Simple Harmonic Motion. Section 3 Properties of Waves

Vibrations and Waves Section 1 Preview Section 1 Simple Harmonic Motion Section 2 Measuring Simple Harmonic Motion Section 3 Properties of Waves Section 4 Wave Interactions Vibrations and Waves Section

### Mechanical waves Electromagnetic waves

Waves Energy can be transported by transfer of matter. For example by a thrown object. Energy can also be transported by wave motion without the transfer of matter. For example by sound waves and electromagnetic

### g L Agenda Chapter 13 Problem 28 Equations of Motion for SHM: What if we have friction or drag? Driven Oscillations; Resonance 4/30/14 k m f = 1 2π

Agenda Today: HW quiz, More simple harmonic motion and waves Thursday: More waves Midterm scores will be posted by Thursday. Chapter 13 Problem 28 Calculate the buoyant force due to the surrounding air

### 6. An oscillator makes four vibrations in one second. What is its period and frequency?

Period and Frequency 19.1 The period of a pendulum is the time it takes to move through one cycle. As the ball on the string is pulled to one side and then let go, the ball moves to the side opposite the

### Doppler Effect. PHY132H1F Introduction to Physics II Class 3 Outline:

PHY132H1F Introduction to Physics II Class 3 Outline: Doppler Effect Principle of Superposition Standing Waves on a String Standing Sound Waves Wave Interference Beats Survey: How did the reading go that

### Wave Motion. interference destructive interferecne constructive interference in phase. out of phase standing wave antinodes resonant frequencies

Wave Motion Vocabulary mechanical waves pulse continuous periodic wave amplitude period wavelength period wave velocity phase transverse wave longitudinal wave intensity displacement amplitude phase velocity

### Pre AP Physics: Unit 7 Vibrations, Waves, and Sound. Clear Creek High School

Pre AP Physics: Unit 7 Vibrations, Waves, and Sound Clear Creek High School Simple Harmonic Motion Simple Harmonic Motion Constant periodic motion of an object. An object oscillates back and forth along

### Chapter 12: Mechanical Waves and Sound

Chapter 12 Lecture Chapter 12: Mechanical Waves and Sound Goals for Chapter 12 To describe mechanical waves. To study superposition, standing waves and sound. To present sound as a standing longitudinal

### Chapter 16. Waves-I Types of Waves

Chapter 16 Waves-I 16.2 Types of Waves 1. Mechanical waves. These waves have two central features: They are governed by Newton s laws, and they can exist only within a material medium, such as water, air,

### a wave is a rhythmic disturbance that carries/transfers energy through matter or space A repeating movement

a wave is a rhythmic disturbance that carries/transfers energy through matter or space A repeating movement Mechanical Waves require a medium medium: the matter through which a wave travels examples: water,

### Core Concept. PowerPoint Lectures Physical Science, 8e. Chapter 5 Wave Motions and Sound. New Symbols for this Chapter 2/20/2011

PowerPoint Lectures Physical Science, 8e Chapter 5 Wave Motions and Sound New Symbols for this Chapter T-Period f-frequency v-wave speed λ-wavelength A-Amplitude Sound is transmitted as increased and decreased

### Main Ideas in Class Today

Main Ideas in Class Today After today s class, you should be able to: Identify different types of waves Calculate wave velocity, period and frequency. Calculate tension or velocity for a wave on a string.

### Physics 122 Class #7 Outline. Announcements Traveling waves Math of Sinewaves Doppler Effect Superposition Standing Waves Math of Standing Waves

Physics 122 Class #7 Outline Announcements Traveling waves Math of Sinewaves Doppler Effect Superposition Standing Waves Math of Standing Waves Announcements Updated syllabus is posted Exam #1 is in two

### Waves. harmonic wave wave equation one dimensional wave equation principle of wave fronts plane waves law of reflection

Waves Vocabulary mechanical wave pulse continuous periodic wave amplitude wavelength period frequency wave velocity phase transverse wave longitudinal wave intensity displacement wave number phase velocity

### Chapter 11 Waves. Waves transport energy without transporting matter. The intensity is the average power per unit area. It is measured in W/m 2.

Chapter 11 Waves Energy can be transported by particles or waves A wave is characterized as some sort of disturbance that travels away from a source. The key difference between particles and waves is a

### PHYSICS - GIANCOLI CALC 4E CH 15: WAVE MOTION.

!! www.clutchprep.com CONCEPT: WHAT IS A WAVE? A WAVE is a moving disturbance (oscillation) that carries energy. - A common example is a wave on a string, where the moving string carries energy We re only

### Similarly to elastic waves, sound and other propagated waves are graphically shown by the graph:

Phys 300/301 Physics: Algebra/Trig Eugene Hecht, 3e. Prepared 01/24/06 11.0 Waves & Sounds There are two fundamental waves of transporting energy and momentum: particles and waves. While they seem opposites,

### Transverse waves cause particles to vibrate perpendicularly to the direction of the wave's motion (e.g. waves on a string, ripples on a pond).

Waves Introduction A vibration must be the source of a wave. Waves in turn also cause vibrations. They are intrinsically connected. Waves transmit energy. There are different ways in which waves can be

### 23.1 Period and Frequency

23.1 Period and Frequency 23.1 The period of a pendulum is the time it takes to move through one cycle. As the ball on the string is pulled to one side and then let go, the ball moves to the side opposite

### PHYSICS. Waves & Simple Harmonic Motion

PHYSICS Waves & Simple Harmonic Motion A repeating back-and-forth motion about an equilibrium position is a vibration. A disturbance that is transmitted progressively from one place to the next with no

### Lab 2: Superposition of waves on a string

Lab 2: Superposition of waves on a string Name: Group Members: Date: TA s Name: Apparatus: PASCO mechanical vibrator, PASCO interface, string, mass hanger (50 g) and set of masses, meter stick, electronic

### Superposition of waves on a string

Superposition of waves on a string Name: Group Members: Date: TA s Name: Apparatus: PASCO mechanical vibrator, string, mass hanger (50 g) and set of masses, meter stick, electronic scale, signal generator,

### Chapter # 08 Waves. [WAVES] Chapter # 08

Chapter # 08 Waves Q2) Write short answers of the following questions. i) What is the difference between progressive and stationary waves? Answer: Progressive Waves 1 Progressive waves are the result of

### Waves Practice Problems AP Physics In a wave, the distance traveled by a wave during one period is called:

Waves Practice Problems AP Physics 1 Name 1. In a wave, the distance traveled by a wave during one period is called: (A) Amplitude (B) Frequency (C) Wavelength (D) Displacement 2. A stretched wire resonates

### PHY 221: Wavefunction, Wave Superposition, Standing Waves on a String

PHY 221: Wavefunction, Wave Superposition, Standing Waves on a String Objective Write a mathematical function to describe the wave. Describe a transverse wave and a longitudinal wave. Describe frequency,

### MECHANICAL WAVES AND SOUND

MECHANICAL WAVES AND SOUND Waves Substances have a stable equilibrium state Uniform pressure everywhere throughout the substance Atomic springs are at their equilibrium length Can make a wave by disturbing

### DEVIL PHYSICS THE BADDEST CLASS ON CAMPUS IB PHYSICS

DEVIL PHYSICS THE BADDEST CLASS ON CAMPUS IB PHYSICS TSOKOS LESSON 4-6 STANDING WAVES Essential Idea: When travelling waves meet they can superpose to form standing waves in which energy may not be transferred.

### Chapter 14: Waves. What s disturbing you?

Chapter 14: Waves What s disturbing you? Wave Properties Waves carry energy through matter. The matter can move with the wave, or at right angles to it. Newton s laws and conservation laws govern the behavior

### 9.2 Waves at Media Boundaries

media boundary the location where two or more media meet Figure 1 The walls and shapes of recording studios are carefully designed to ensure that the sound going to the microphone is a true representation

### The physicist's greatest tool is his wastebasket Albert Einstein

Chapter 20: Waves The physicist's greatest tool is his wastebasket Albert Einstein 2 20.1 Waves Describe transverse and longitudinal waves. Learn the properties of waves. Calculate the speed of a wave.

### Section 1: Types of Waves

Waves Section 1 Section 1: Types of Waves Preview Key Ideas Bellringer What Is a Wave? Vibrations and Waves Transverse and Longitudinal Waves Surface Waves Waves Section 1 Key Ideas What does a wave carry?

### 20.1 Waves. A wave is an oscillation that travels from one place to another. Because waves can change motion, they are a travelling form on energy.

Waves Chapter 20 1 20.1 Waves A wave is an oscillation that travels from one place to another. Because waves can change motion, they are a travelling form on energy. 2 Recognizing Waves Waves are present:

### Ch16Lectures Page 1. Ch16Lectures Thursday, April 16, :22 PM

Ch16Lectures Page 1 Ch16Lectures Thursday, April 16, 2009 12:22 PM Ch16Lectures Page 2 Ch16Lectures Page 3 Ch16Lectures Page 4 The following animation illustrates the interference of two wave pulses travelling

### Section 1 Types of Waves. Distinguish between mechanical waves and electromagnetic waves.

Section 1 Types of Waves Objectives Recognize that waves transfer energy. Distinguish between mechanical waves and electromagnetic waves. Explain the relationship between particle vibration and wave motion.

### Defined as a transfer of energy, in the form of a temporary disturbance of a medium, where the medium itself does not move.

Waves: Defined as a transfer of energy, in the form of a temporary disturbance of a medium, where the medium itself does not move. Three Classifications of waves: 1. Mechanical waves: These are waves that

### Ch13. Vibrations and Waves HW# 1, 5, 9, 13, 19, 29, 35, 37, 39, 41, 43, 47, 51, 53, 61

Ch13. Vibrations and Waves HW# 1, 5, 9, 13, 19, 29, 35, 37, 39, 41, 43, 47, 51, 53, 61 If you displace a system that obeys Hooke s Law, It will follow simple harmonic motion. The system will oscillate.

### Today: waves. Exam Results. Wave Motion. What is moving? Motion of a piece of the rope. Energy transport

Exam: Exam scores posted on Learn@UW No homework due next week Exam Results D C BC B AB A Today: waves Have studied Newton s laws, motion of particles, momentum, energy, etc. Laws for describing things

### Exercises Vibration of a Pendulum (page 491) 25.2 Wave Description (pages ) 25.3 Wave Motion (pages )

Exercises 25.1 Vibration of a Pendulum (page 491) 1. The time it takes for one back-and-forth motion of a pendulum is called the. 2. List the two things that determine the period of a pendulum. 3. Circle

### Physics 101 Lecture 20 Waves & Sound

Physics 101 Lecture 20 Waves & Sound Recall we ve talked about transverse & longitudinal waves: - transverse waves: medium motion is to wave motion - longitudinal (pressure) waves: medium motion is to

### 2 nd Term Final. Revision Sheet. Students Name: Grade: 10 A/B. Subject: Physics. Teacher Signature

2 nd Term Final Revision Sheet Students Name: Grade: 10 A/B Subject: Physics Teacher Signature 1 NAME: GRADE: 10 MULTIPLE CHOICES PHYSICS WORKSHEET In the space provided, write the letter of the term or

### Practice Questions: Waves (AP Physics 1) Multiple Choice Questions:

Practice Questions: Waves (AP Physics 1) Multiple Choice Questions: 28. A transverse wave is traveling on a string. The graph above shows position as a function of time for a point on the string. If the

### Define transverse waves and longitudinal waves. Draw a simple diagram of each

AP Physics Study Guide Chapters 11, 12, 24 Waves, Sound, Light & Interference Name Write the equation that defines each quantity, include units for all quantities. wave speed-wavelength equation natural

### Phys1111K: Superposition of waves on a string Name:

Phys1111K: Superposition of waves on a string Name: Group Members: Date: TA s Name: Apparatus: PASCO mechanical vibrator, PASCO interface, string, mass hanger (50 g) and set of masses, meter stick, electronic

### Waves Physics Waves What is a wave and what does it carry? Types of Waves 1. Transverse

Waves Physics 20.1 Waves What is a wave and what does it carry? Types of Waves 1. Transverse A transverse wave has its oscillations/vibrations to the direction the wave moves. 2. Longitudinal A longitudinal

### Waves-Wave Basics. 1. Which type of wave requires a material medium through which to travel? 1. sound 2. television 3. radio 4.

Waves-Wave Basics 1. Which type of wave requires a material medium through which to travel? 1. sound 2. television 3. radio 4. x ray 2. A single vibratory disturbance moving through a medium is called

### Today: waves. Exam Results, HW4 reminder. Chapter 8: Wave Motion. What is moving? Energy transport. Motion of a piece of the rope

Exam Results, HW4 reminder Exam: Class average = 13.6/20 ( at B/BC boundary) Exam scores posted this afternoon on Learn@UW Exam solutions are on course web page March Chap 7: Question A, Exercises 2 Griffith

### Waves and Sound. Honors Physics

Waves and Sound Honors Physics Simple Harmonic Motion Refers to repetitive, cyclical motion (like a pendulum or waves) Can be described with sine curve For a pendulum only T 2 L g Example problem The world

Chapter 14 Waves http://faraday.physics.utoronto.ca/iyearlab/intros/standingwaves/flash/long_wave.html Apr 30 7:11 AM May 5 7:16 AM 1 May 5 7:17 AM May 5 7:17 AM 2 May 5 7:19 AM May 5 7:29 AM 3 May 5 7:30

### Wave. 1. Transverse 2. Longitudinal 3. Standing

Wave Wave: A disturbance traveling through a medium by which energy is transferred from one particle of the medium to another without causing any permanent displacementof the medium itself. (A Wave Transports

### CH 17 - MECHANICAL WAVES & SOUND. Sec Mechanical Waves

CH 17 - MECHANICAL WAVES & SOUND Sec. 17.2 - Mechanical Waves Mechanical Wave - disturbance in matter that carries energy from one place to another. Mechanical waves require matter called a MEDIUM to travel

### Chapter 14. Vibrations and Waves

Chapter 14 Vibrations and Waves Chapter 14 Vibrations and Waves In this chapter you will: Examine vibrational motion and learn how it relates to waves. Determine how waves transfer energy. Describe wave

### Traveling Waves vs. Standing Waves

The Physics Classroom» Physics Tutorial» Waves» Traveling Waves vs. Standing Waves Waves - Lesson 4 - Standing Waves Traveling Waves vs. Standing Waves Traveling Waves vs. Standing Waves Formation of Standing

### CHAPTER 14 VIBRATIONS & WAVES

Physics Approximate Timeline Students are expected to keep up with class work when absent. CHAPTER 14 VIBRATIONS & WAVES Day Plans for the day Assignments for the day 1 Section 14.1 Periodic Motion o Definitions

### Lesson 14: Simple harmonic motion, Waves (Sections )

Circular Motion and Simple Harmonic Motion The projection of uniform circular motion along any ais (the -ais here) is the same as simple harmonic motion. We use our understanding of uniform circular motion

### Exam Results, HW4 reminder. Wave Motion. Today: waves. What is moving? Motion of a piece of the rope. Exam Results. Average

Exam Results, HW4 reminder Exam: Class average = 14.1/20 ( at B/BC boundary) Exam scores posted this afternoon on Learn@UW Exam solutions will be posted on course web page HW3 (short) assigned at WileyPLUS

### Waves Chapter Problems

Waves Chapter Problems Wave speed, frequency and wavelength 1. A fisherman noticed that a float makes 30 oscillations in 15 seconds. The distance between two consecutive crests is 2 m. What is the period

### Chapter 19: Vibrations And Waves

Lecture Outline Chapter 19: Vibrations And Waves This lecture will help you understand: Vibrations of a Pendulum Wave Description Wave Speed Transverse Waves Longitudinal Waves Wave Interference Standing

### 4.4 WAVE CHARACTERISTICS 4.5 WAVE PROPERTIES Student Notes

4.4 WAVE CHARACTERISTICS 4.5 WAVE PROPERTIES Student Notes I. DIFFERENT TYPES OF WAVES A. TRANSVERSE AND LONGITUDINAL WAVES B. WAVE PULSES AND TRAVELLING WAVES C. SOUND AND WATER WAVES II. DEFINING TERMS

### Chapter 14 Waves. Apr 30 7:11 AM

Chapter 14 Waves http://faraday.physics.utoronto.ca/iyearlab/intros/standingwaves/flash/long_wave.html Apr 30 7:11 AM 1 May 5 7:16 AM 2 May 5 7:17 AM 3 May 5 7:17 AM 4 May 5 7:19 AM 5 May 5 7:29 AM 6 May

### Lecture 8. Sound Waves Superposition and Standing Waves

Lecture 8 Sound Waves Superposition and Standing Waves Sound Waves Speed of Sound Waves Intensity of Periodic Sound Waves The Doppler Effect Sound Waves are the most common example of longitudinal waves.

### CH 17 - MECHANICAL WAVES & SOUND. Sec Mechanical Waves

CH 17 - MECHANICAL WAVES & SOUND Sec. 17.2 - Mechanical Waves Mechanical Wave - disturbance in matter that carries energy from one place to another. Mechanical waves require matter called a MEDIUM to travel

### INSTRUMENT INSTRUMENTAL ERROR (of full scale) INSTRUMENTAL RESOLUTION. Tutorial simulation. Tutorial simulation

Lab 1 Standing Waves on a String Learning Goals: To distinguish between traveling and standing waves To recognize how the wavelength of a standing wave is measured To recognize the necessary conditions

### CHAPTER 8: MECHANICAL WAVES TRANSMIT ENERGY IN A VARIETY OF WAYS

CHAPTER 8: MECHANICAL WAVES TRANSMIT ENERGY IN A VARIETY OF WAYS DISCLAIMER FOR MOST QUESTIONS IN THIS CHAPTER Waves are always in motion, as they transmit energy and information from one point to another.

### Introduction. Strand E Unit 2: The Nature of Waves. Learning Objectives. Introduction.

Learning Objectives At the end of this unit you should be able to Describe the main features of diffraction, refraction and reflection, and use the law of reflection. Describe how two progressive waves

### UNIT IV: SOUND AND LIGHT Chapter 25-31

IMPORTANT TERMS: Amplitude Antinodes Blue shift Bow wave Constructive interference Crest Destructive interference Doppler effect Frequency Hertz In phase Interference pattern Longitudinal wave Node Out

### is shown in Fig. 5.1.

1 The variation with time t of the displacement x of a point in a transverse wave T 1 is shown in Fig. 5.1. 1 x A T 1 1 2 3 4 5 6 t/s -A Fig. 5.1 (a) By reference to displacement and direction of travel

### Waves Wave Characteristics

Name: Date: Waves 4.4 Wave Characteristics. A transverse travelling wave has amplitude A 0 and wavelength λ. The distance between a crest and its neighbouring trough, measured in the direction of energy

### Section 1 Types of Waves

CHAPTER OUTLINE Section 1 Types of Waves Key Idea questions > What does a wave carry? > How are waves generated? > What is the difference between a transverse wave and a longitudinal wave? > How do the

### Physics 1520, Spring 2014 Quiz 1B, Form: A

Physics 1520, Spring 2014 Quiz 1B, Form: A Name: Date: Section 1. Multiple Choice Questions 1 2: The equations for two traveling waves traveling on the same string are: Wave 1: y(x, t) = (5.0 cm) cos((2.09

### Physics 1520, Spring 2014 Quiz 1A, Form: A

Physics 1520, Spring 2014 Quiz 1A, Form: A Name: Date: Section 1. Multiple Choice 1. The image below shows two different types of sinusoidal waves produced on a slinky. Which wave is the same type of wave

### Chapter 19: Vibrations and Waves

Chapter 19: Vibrations and Waves SIMPLE HARMONIC MOTION ic or Oscillatory motion is called SHM. Start off with the story of Galileo being in the church. PENDULUM Make the following points with a pendulum

### Not all waves require a medium to travel. Light from the sun travels through empty space.

What are waves? Wave Definition: A disturbance that transfers energy from place to place. What carries waves? A medium, a medium is the material through which a wave travels. A medium can be a gas, liquid,

### PHYSICS - CLUTCH CH 16: WAVES & SOUND.

!! www.clutchprep.com CONCEPT: WHAT IS A WAVE? A WAVE is a moving disturbance (oscillation) that carries energy. - A common example is a wave on a string, where the moving string carries energy We re only

### Waves. Chapter 9. [ pictures will be here, and they include "p" which is a location in the water ]

Chapter 9 Waves Chapter 9 is finished, but is not in camera-ready format. Specifically, all of the diagrams are missing. But here are some excerpts from the text, with omissions indicated by... This chapter

### Lab 12 Standing Waves

b Lab 12 Standing Waves What You Need To Know: Types of Waves The study of waves is a major part of physics. There are quite a few types of waves that can be studied. Depending on who you have for lecture

### What are waves? Wave

What are waves? Wave Definition: A disturbance that transfers energy from place to place. What carries waves? A medium, a medium is the material through which a wave travels. A medium can be a gas, liquid,