Chapter 16 Waves And Sound

Question 0

Particle motion occurs perpendicular to the direction of the disturbance of the wave

Answer 0

Transverse

Question 1

What are the two common features to all waves

Answer 1

1. A wave is a traveling disturbance

2. Wave carries energy from place to place

Question 2

Particle motion occurs parallel to the line of travel of the disturbance of the wave

Answer 2

Longitudinal wave

Question 3

Need a material medium through which they can travel as they transfer energy

Answer 3

Mechanical wave

Question 4

Material through which the energy of mechanical wave is transferred from one particle to another

Answer 4

Medium

Question 5

Need no medium through which travel

Answer 5

Electromagnetic waves

Question 6

Single disturbance traveling through medium

Answer 6

Pulse

Question 7

Consists of cycles or patterns that are produced over and over again at the same frequency

Answer 7

Periodic waves

Question 8

What waves are consisted of

Answer 8

Cycles

Question 9

Maximum excursion particle of the medium from the particles undisturbed position the distance between a crest or trough to the undisturbed position

Answer 9

Amplitude

Question 10

The horizontal length between the two same points on consecutive cycles

Answer 10

Wavelength

Question 11

Time it takes to make a cycle

Answer 11

Period

Question 12

Number of cycles per second

Answer 12

Frequency

Question 13

What characterizes the energy content of the mechanical waves

Answer 13

It’s amplitude

Question 14

What occurs with the speed when the wave in the same medium

Answer 14

The speed is constant

Question 15

What does the speed depend on

Answer 15

Properties of a new medium

Question 16

What is the relationship between frequency and wavelength

Answer 16

Inversely related

Question 17

What does not amplitude effect

Answer 17

Speed wavelength and frequency

Question 18

What occurs when a wave reaches the boundary of the medium

Answer 18

Part of it is reflected

Question 19

What happens to the remainder of a reflected wave

Answer 19

It is transmitted into the new medium

Question 20

What remains the same whenever wave enters a new medium

Answer 20

The frequency

Question 21

What is the speed of a wave determined by in a rope or similar material

Answer 21

The tension in the rope and the linear density of the rope

Question 22

When two or more waves are present simultaneously at the same place

Answer 22

Interference

Question 23

What does interference result in

Answer 23

The resultant disturbance is the sum of the disturbances of the individual waves

Question 24

When two waves meet perfectly and the amplitudes are combined

Answer 24

Constructive interference

Question 25

When two waves meet oppositely and he amplitude is negated

Answer 25

Destructive interference

Question 26

Wave changing direction after encountering a barrier and the wave energy remains in original medium

Answer 26

Reflection

Question 27

What is the law of reflection

Answer 27

The angle of reflection is equal to the angle of incidence measured relative to the normal line

Question 28

Change in direction of waves at the boundary between two different media the wave enters new medium

Answer 28

Refraction

Question 29

The bending of a wave around obstacles placed in its path

Answer 29

Diffraction

Question 30

What does the reflected wave look like if the encountered barrier is rigid compared to the original medium

Answer 30

Wave will be inverted

Question 31

What does the wave look like if the encountered barrier is flexible compared to the original medium

Answer 31

Wave will be upright

Question 32

What happens to the reflection of a wave if the encountered barrier material is similar to the original medium

Answer 32

Very little wave energy is reflected most of it will transmit through the new medium in form of upright wave

Question 33

Happens to the wave energy if the encountered barrier material is very different from the original medium

Answer 33

Most of the wave energy will reflect in the form of an inverted wave while very little will be transmitted into the new medium

Question 34

What causes refraction

Answer 34

The change in the speed of a wave when it enters a new medium

Question 35

What happens to the wave frequency refraction occurs

Answer 35

Remains the same

Question 36

Where does the wave bend if it slows down whenever it enters the new medium

Answer 36

It bends towards the normal line

Question 37

Where does the wave bend when it speeds up in a new medium

Answer 37

Bends away from the normal line

Question 38

What does the extent of diffraction depend upon

Answer 38

The wavelength of the waves and the size of the obstacle

Question 39

What is the proportion regarding diffraction

Answer 39

Diffraction amount is proportional to the wavelength over the size of the obstacle

Question 40

What remains constant during diffraction

Answer 40

Wave speed and wave frequency

Question 41

How is a standing wave formed

Answer 41

Formed by interfering waves traveling in the opposite direction these reflected waves have the same wavelength amplitude and speed

Question 42

Stationary points on the rope the displacements of the interfering waves are equal and opposite

Answer 42

Node

Question 43

What occurs in order to form a node

Answer 43

Destructive interference

Question 44

The points of maximum amplitude where constructive interference is greatest

Answer 44

Antinodes

Question 45

What is occurring in order to form an antinode

Answer 45

Constructive interference

Question 46

What is the frequency relationship between the waves that form a standing wave

Answer 46

Interference of equal frequency waves

Question 47

How many nodes and antinodes are in one cycle of a standing wave

Answer 47

Three nodes and two antinodes Three antinodes and two nodes

Question 48

What is the Doppler effect

Answer 48

The discrepancy between actual wave frequency and observed wave frequency that occurs due to the motion of the source with respect to the observer

Question 49

What is true about the frequency when the source is moving towards the observer

Answer 49

The observed frequency is higher than the actual frequency of the source

Question 50

What is true about the frequency if the source is moving away from the observer

Answer 50

The observed frequency is lower than the actual frequency of the source

Question 51

What happens to the waves as the source moves

Answer 51

They bunch up in front of the source and spread out behind the source

Question 52

When does the observed frequency match the source frequency

Answer 52

When the source is not moving toward or away from the observer

Question 53

What is true about frequency if the source is moving at a constant velocity or speed

Answer 53

Frequencies constant

Question 54

Happens to the frequency if the source is accelerating

Answer 54

Frequencies changing

Question 55

Transverse wave

Answer 55

Wave motion is perpendicular to particle motion

Question 56

Longitudinal wave

Answer 56

Wave motion is parallel to particle motion

Question 57

If a pulse is sent along a rope, how does the rope behave at any given point after the pulse has passed

Answer 57

It returns to it's original position, as if it were never disturbed

Question 58

Waves are sent along a spring of fixed length. How can the speed of the waves in the spring be changed

Answer 58

It can't be changed because wave speed is constant in medium

Question 59

Does the frequency of the wave actually change during the Doppler effect

Answer 59

No the observer just perceives it to change due to the relative motion of the source

Question 60

What does the degree to which the observed frequency differs from the source frequency depend upon

Answer 60

Velocity of the wave, observer and source

Question 61

What does the principle of linear superposition state

Answer 61

When waves interfere the resulting disturbance is the sum of the individual wave disturbances