Waves and Sounds

Question 1

a traveling disturbance

Answer 1

wave

Question 2

it carries energy from place to place

Answer 2

wave

Question 3

a wave that is one in which the disturbance occurs parallel to the line of travel of the wave.

Answer 3

Longitudinal Wave

Question 4

Sound wave is a __________

Answer 4

longitudinal wave

Question 5

one in which the disturbance occurs perpendicular to the direction of travel of wave.

Answer 5

Transverse Wave

Question 6

• Radio wave
• Light Waves
• Microwaves

is what type of waves?

Answer 6

Transverse Wave

Question 7

it travels on the strings of instruments such as guitars and banjos.

Answer 7

Transverse waves

Question 8

consists of cycle or patterns that are produced over and over again by the source.

Answer 8

Periodic Wave

Question 9

Every segment of the slinky vibrates in ____________, provided the end of the slinky is moved in ______________.

Answer 9

Simple Harmonic Motion

Question 10

the repetitive movement back and forth through a equilibrium, or central position, so that the maximum displacement on one side of this position is equal to the maximum displacement on the other side.

Answer 10

Simple Harmonic Motion

Question 11

A wave that does not appear to travel. Each point on the standing wave will oscillate about a point on the axis of the wave.

Answer 11

Standing Wave

Question 12

Standing waves are formed by the _________ of two traveling waves of the same frequency (With the same polarizationand the same amplitude) travelling in opposite directions.

This is usually achieved by using a traveling wave and its reflection, which will ensure that the frequency is the same.

Answer 12

Superposition

Question 13

Points on a stationary wave that osciallate with maximum amplitude.

Answer 13

Antinodes

Question 14

points of zero amplitude and appear to be fixed.

Answer 14

Nodes

Question 15

the maximum excursion of a particle of the medium from the particles undisturbed position.

Answer 15

Amplitude

Question 16

the horizontal length of one cycle of the wave.

Answer 16

Wavelength

Question 17

the time required for one complete cycle.

Answer 17

Period

Question 18

related to the period and has units of Hz or s-1

Answer 18

Frequency

Question 19

Frequency Formula

Answer 19

f = 1/T

Question 20

A train is moving at a ________- serves as an analogy for a traveling wave. A simple relation exists between the period, the wavelength, and the speed of any periodic.

Answer 20

Constant speed

Question 21

The speed at which the wave moves to the right depends on how quickly one particle of the string is accelerated upward in response to the __________

Answer 21

Net pulling force

Question 22

A longitudinal wave that is created by a vibrating object, such as a guitar string, the human vocal cords or diaphragm of a loudspeaker.

Answer 22

Sounds

Question 23

Sounds can be created or transmitted __________ such as a solid, liquid or gas.

Answer 23

Only in a medium

Question 24

Sounds cannot exist in _________

Answer 24

Vacuum

Question 25

The distance between adjacent ___________ is equal to the wavelength of the sound wave.

Answer 25

condensations

Question 26

__________ and ________ travels from the speaker to the lister but the individual air molecules do not move with the wave. A given molecule vibrates back and forth about a fixed location.

Answer 26

Condensation Rarefractions

Question 27

the number of cycles per second

Answer 27

Frequency

Question 28

A sound with a single frequency

Answer 28

Pure tone

Question 29

the brain interprets the frequency in terms of the subjective quality

Answer 29

Pitch

Question 30

an attribute of a sound that depends primarily on the pressure amplitude of the wave

Answer 30

Loudness

Question 31

Sound travels through ____ liquids and solids at considerably different speed.

Answer 31

Gases

Question 32

It carry energy that can be used to do work.

Answer 32

Sound Waves

Question 33

the amount of energy transported per second

Answer 33

Power

Question 34

defined as the power that passes perpendicularly through a surface divided by the area of that surface.

Answer 34

Sound Intensity

Question 35

For a 1000 Hz tone, the smallest sound intensity that the human ear can detect is about _______________.

Answer 35

1x10^12 W/m^2

Question 36

For a 1000 Hz tone, the smallest sound intensity that the human ear can detect is about 1x10^12 W/m^2. This intensity is called the __________________

Answer 36

Threshold of Hearing

Question 37

If the sounds emits sound _________________, the intensity depends on the distance from the source in a simple way.

Answer 37

uniformly in all directions

Question 38

a measurement unit used when comparing two sound intensities.

Answer 38

Decimbel (dB)

Question 39

The way in which human hearing mechanism responds to intensity, it is appropriate to use a logarithmic scale

Answer 39

Intensity Level

Question 40

Note that log(1) =

Answer 40

0

Question 41

the intensity of the sound is equal to the threshold of hearing

Answer 41

the intensity level is zero.

Question 42

reference intensity formula

Answer 42

1.00 x 10^12 W/m^2

Question 43

the change in frequency or pitch of the sound detected by an observer because the sound source and the observer have different velocities with respect to the medium of sound propagation.

Answer 43

Doppler Effect