[physics] hewitt chapter 25 waves vocab

Question 1

period

Answer 1

amount of time for one cycle of a wave

Question 2

frequency

Answer 2

amount of waves in a given amount of time

Question 3

what is frequency measured in?

Answer 3

hertz

Question 4

what is period measured in?

Answer 4

seconds

Question 5

amplitude

Answer 5

change in distance between an equilibrium position and the crest of a transverse wave

Question 6

crest

Answer 6

highest point on a transverse wave

Question 7

trough

Answer 7

lowest point on a transverse wave

Question 8

wavelength

Answer 8

distance on a wave from crest to crest or trough to trough

Question 9

medium

Answer 9

the matter through which a wave travels

Question 10

compression

Answer 10

dense parts of a longitudinal wave

Question 11

rarefaction

Answer 11

the least dense parts of a longitudinal wave

Question 12

formula for wave velocity

Answer 12

v = wavelength*frequency

Question 13

interference

Answer 13

when waves overlap and form a new wave

Question 14

constructive interference

Answer 14

when waves overlap crests; the result is an addition of amplitudes

Question 15

destructive interference

Answer 15

when waves overlap a crest and trough; the result is a subtraction of amplitudes

Question 16

standing wave

Answer 16

a wave that is reflected back upon itself that has nodes and antinodes

Question 17

node

Answer 17

stationary part of a standing wave

Question 18

antinode

Answer 18

the position on a standing wave that has the largest amplitude

Question 19

doppler effect

Answer 19

an apparent change in frequency due to a moving source

Question 20

what happens to frequency when a wave source is moving toward you?

Answer 20

frequency increases

Question 21

what happens to frequency when a wave source is moving away from you?

Answer 21

frequency decreases

Question 22

is it possible for one wave to cancel another wave so that the combined amplitude is zero

Answer 22

possible with destructive interference

Question 23

sonic boom

Answer 23

the sharp, loud crack when a sound source moves faster than the sound waves it is creating

Question 24

what type of wave is a sound wave?

Answer 24

longitudinal

Question 25

what type of wave is an ocean wave?

Answer 25

transverse

Question 26

as frequency of sound increases, what happens to the pitch?

Answer 26

it increases

Question 27

what types of waves are affected by the doppler effect?

Answer 27

all waves

Question 28

what is a mechanical wave?

Answer 28

a wave that requires a medium