Chapter 4: Sound waves

Question 1

Amplitude

Answer 1

Maximum displacement from equilibrium

Question 2

Period

Answer 2

Amount of time for one complete cycle

Question 3

Frequency

Answer 3

Number of cycles in one second

Question 4

Medium

Answer 4

Material in which a wave travels

Question 5

Mechancial wave

Answer 5

A wave that propagates through an eleastic medium

Question 6

Standing wave

Answer 6

A wave in which it appears to be standing still. Two waves with the same same frequency, amplitude, and wavelength interfere

Question 7

Transverse wave

Answer 7

A wave whose particels vibrate perependicular to the direction of wave motion

Question 8

Crest

Answer 8

Highest point above the equilibrium position

Question 9

Trough

Answer 9

Lowest point below the equilibrium position

Question 10

Wavelength

Answer 10

Distance between two like waves

Question 11

Longitudinal wave

Answer 11

A wave whoe particles vibrate parallel to the direction of wave motion(sound)

Question 12

Constructive interference

Answer 12

interference in which individual displacements on the same side of the equilibrium position are added together to form the resultant wave (wave gets bigger).

Question 13

Deconstructive interference

Answer 13

interference in which individual displacements on opposite sides of the equilibrium position are added together to form the resultant wave (wave gets smaller).

Question 14

Node

Answer 14

Spot on a standing wave that does not move due to complete destructive interference

Question 15

Antinode

Answer 15

Spot on a standing wave that moves from crest to trough due to complete constructive interference

Question 16

Compression

Answer 16

the region of a longitudinal wave in which the density and pressure are greater than normal.

Question 17

Rarefraction

Answer 17

the region of a longitudinal wave in which the density and pressure are less than normal.

Question 18

Pitch

Answer 18

the perceived highness or lowness of a sound, depending on the frequency of the sound waves.

Question 19

Doppler effect

Answer 19

perceived shift in frequency that is the result of relative motion between the source of waves
and an observer.

Question 20

Resonance

Answer 20

a condition that exists when the frequency of a force applied to a system matches the natural
frequency of vibration of the system.

Question 21

Fundamental frequency

Answer 21

the lowest frequency of vibration of a standing wave.

Question 22

Harmonic series

Answer 22

a series of frequencies that includes the fundamental frequency and integral multiples of the
fundamental frequency.

Question 23

Beats

Answer 23

Interference of waves of slightly different frequencies traveling in the same direction , pereceived as a variation in loudness

Question 24

Pitch of a sound is relative to the waves:

Answer 24

Frequency

Question 25

The loudness of a sound wave is relative to the waves:

Answer 25

Amplitude

Question 26

In order to change the velocity of a wave, there must be a change in

Answer 26

Medium

Question 27

In order to change the frequency of a wave, the______ must change

Answer 27

Source

Question 28

Rank the following media from lowest speed of sound to highest: solid, liquid, gas.

Answer 28

Gas, liquid, solid

Question 29

What causes beats

Answer 29

Interference of sound sources with slightly different frequencies