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Physics > 1138 Definitions > Flashcards

Flashcards in 1138 Definitions Deck (32)
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1
Q

maximum displacement in either direction

A

amplitude

2
Q

wave crosses axis moving toward crest

A

ascending nodes

3
Q

measurement of sound intensity

A

bel

4
Q

disturbances in a fluid or solid

A

sound

5
Q

region of higher air pressure

A

compression

6
Q

number of waves per second

A

frequency

7
Q

disturbance in same direction as wave motion

A

longitudinal wave

8
Q

wavelength

A

distance between relative points on separate waves

9
Q

region of reduced air pressure

A

rarefaction

10
Q

speed at which a disturbance travels through its medium

A

wave speed

11
Q

wave crosses axis moving toward trough

A

descending node

12
Q

Affects the speed of a wave

A

medium

13
Q

change in the direction as a wave passes into a new medium

A

refraction

14
Q

an abrupt change in the direction of a wave

A

reflection

15
Q

loud compression wave generated by an object traveling at the speed of sound or faster

A

sonic boom

16
Q

the study of sound and its control in enclosed areas

A

acoustics

17
Q

a room in which sound is reflected and concentrated at a second location

A

whispering gallery

18
Q

a wave caused by an earthquake

A

seismic waves

19
Q

an instrument that measures distances to underwater obstacles

A

sonar

20
Q

the speed of sound

A

sound barrier

21
Q

A phenomenon in which waves from an approaching or receding source seem to change in frequency for an observer

A

Doppler effect

22
Q

A periodic, back-and-forth, twisting motion about a central axis is called a _________

A

torsional wave

23
Q

The alternate rising and falling of amplitude due to interference

A

beats

24
Q

waves produced by two wave trains of the same frequency traveling in opposite directions

A

standing waves

25
Q

points at the center of the loops of a standing wave where the amplitude is greatest

A

antinodes

26
Q

the single wave that has the properties of two or more individual waves

A

resultant

27
Q

make music by a vibrating air column in a pipe

A

wind instruments

28
Q

separating a complex wave motion into a series of simple sine waves

A

Fourier analysis

29
Q

sound made of so many different frequencies that no discernible pattern can be recognized

A

noise

30
Q

make music by bowing, plucking, or striking strings

A

stringed instruments

31
Q

sections between consecutive nodes

A

loops

32
Q

sound with a discernible pattern that repeats

A

music