Waves And Energy

Question 1

A periodic back-and-forth motion, or oscillation, that transmits energy

Answer 1

Wave

Question 2

A substance through which a wave transfers its energy

Answer 2

Medium

Question 3

A ripple of disturbance

Answer 3

Wave pulse

Question 4

A series of waves

Answer 4

Wave train

Question 5

High point of a wave train

Answer 5

Crest

Question 6

Low point of a wave train

Answer 6

Trough

Question 7

Waves in which particles of the transmitting medium oscillate at right angles to the direction of wave travel

Answer 7

Transverse Waves

Question 8

Waves in which particles of the transmitting medium oscillate in the direction of wave motion

Answer 8

Longitudinal waves

Question 9

A pulse of a longitudinal wave in which particles of the transmitting medium are squeezed together

Answer 9

Compression pulse

Question 10

The pulse of a longitudinal wave in which particles of the transmitting medium are spread

Answer 10

Rarefaction

Question 11

What constitutes single longitudinal wave

Answer 11

A compression pulse and rarefaction pulse

Question 12

An oscillation caused by a restorative force that is proportional to the displacement from equilibrium

Answer 12

Simple harmonic force

Question 13

The length of a single wave

Answer 13

Wavelength

Question 14

The maximum distance that particles are displaced by a wave

Answer 14

Amplitude

Question 15

The number of waves that pass a given point per unit time

Answer 15

Frequency

Question 16

A time needed for one cycle to pass

Answer 16

Period

Question 17

Formula for frequency

Answer 17

Frequency = Waves\Time

Question 18

Formula for period

Answer 18

Period= Time/Waves

Question 19

Speed does not change as long as what doesn’t change

Answer 19

The medium

Question 20

The relationship between speed, wavelength, and frequency

Answer 20

(Directly proportional) Speed= Wavelength x Frequency

Question 21

Device used to demonstrate the behavior of waves

Answer 21

Ripple tank

Question 22

Boundary of each wave crest

Answer 22

Wave front

Question 23

The change in the course of a wave as a result of a collision with an object or boundary

Answer 23

Reflection

Question 24

Waves that strike the obstacle

Answer 24

Incident waves

Question 25

Waves that bounce off the object

Answer 25

Reflected waves

Question 26

Law that states that the angle of incidence equals the angle of reflection

Answer 26

Law of Reflection

Question 27

The bending path of a wave as a result of a change in wave speed

Answer 27

Refraction

Question 28

What do refracted waves always bend toward

Answer 28

The medium that slows them down

Question 29

The spreading out of a wave after it passes through a narrow opening

Answer 29

Diffraction

Question 30

What causes a wave to spread out evenly when the opening is roughly equal to one wavelength

Answer 30

Diffraction

Question 31

The reinforcement or cancellation that occurs when two or more waves meet

Answer 31

Interference

Question 32

The form of interference which occurs when two crests or two troughs meet

Answer 32

Constructive interference

Question 33

The form of interference that occurs when a crest meets a trough

Answer 33

Destructive interference

Question 34

Vibrations traveling through a medium in the form of longitudinal pressure waves

Answer 34

Sound

Question 35

The strength of a sound wave

Answer 35

Intensity

Question 36

The relationship between the intensity of a sound and the square of its distance

Answer 36

Inversely proportional

Question 37

The effect of the intensity on the way the human ear perceives sound

Answer 37

Loudness

Question 38

A measure of sound intensity that better reflects percieved loudness

Answer 38

Sound intensity level

Question 39

The effect of frequency on the way the human ear perceives sound

Answer 39

Pitch

Question 40

Sound that can be heard

Answer 40

Audible sound

Question 41

Sounds with pitches below the audible range

Answer 41

Infrasonic

Question 42

Sounds with pitches above the audible range

Answer 42

Ultrasonic

Question 43

Change in frequency caused by an object’s motion

Answer 43

Doppler effect

Question 44

What does the Doppler effect depend on

Answer 44

Relative motion

Question 45

Main factor affecting the speed of sound in air

Answer 45

Temperature

Question 46

Formula for speed of sound

Answer 46

(Simplified) v= 331 m/s +0.61 x T

Question 47

Speeds above the speed of sound

Answer 47

Supersonic

Question 48

Speeds below the speed of sound

Answer 48

Subsonic

Question 49

Loud noise left by a shockwave

Answer 49

Sonic boom

Question 50

Violent compression pulse produced by constructive interference between waves produced by an object moving at supersonic speeds

Answer 50

Shock wave

Question 51

Multiple reflections that cause persistence of sound

Answer 51

Reverberation

Question 52

A sound heard distinctly after being reflected from some object

Answer 52

Echo

Question 53

Sound Navigation and Ranging

Answer 53

Sonar

Question 54

The procedure for calculating distance by measuring the time interval that elapses between the sending of a sound wave the return of an echo

Answer 54

Echo ranging

Question 55

The process of dissipating the energy of sound waves in matter

Answer 55

Absorption

Question 56

The study of sound

Answer 56

Acoustics

Question 57

What do sound waves always bend toward

Answer 57

The medium that slows them down

Question 58

A series of organized sound waves with the specific pitches that have been deliberately arranged

Answer 58

Music

Question 59

Random sound with no intended pattern

Answer 59

Noise

Question 60

A sound of definite pitch

Answer 60

Note

Question 61

The difference in pitch between a note and a second note that has twice the frequency of the first note

Answer 61

Octave

Question 62

Result of two musical notes interfering harmoniously

Answer 62

Consonance

Question 63

Result of two musical notes interfering in a disagreeable way

Answer 63

Dissonance

Question 64

Musical distance between two notes

Answer 64

Interval

Question 65

Burst of louder sound occurring when interfering sound waves are perceived as a single pulsating sound

Answer 65

Beat

Question 66

The sound with the lowest frequency

Answer 66

Fundamental

Question 67

Sounds produced at higher frequencies than the fundamental

Answer 67

Overtones

Question 68

Series showing the frequency relationships between a fundamental and its overtones

Answer 68

Harmonic series

Question 69

How do you find the ideal frequency of a harmonic

Answer 69

Multiplying the frequency of the fundamental by the number of the harmonic

Question 70

Sound quality of a musical instrument

Answer 70

Timbre

Question 71

The set of frequencies at which an object vibrates

Answer 71

Natural frequencies

Question 72

Situation in which a driving frequency of an object is the same as one of the object’s natural frequency

Answer 72

Resonance

Question 73

Opening in a hollow-bodied musical instrument that reverberates the sound waves produced by the instrument to make the sound wave louder by resonance

Answer 73

Resonator