Physics

Front 1

transfer of energy from one point to another with no transfer of mass.

Back 1

wave

Front 2

material through which a disturbance travels

Back 2

medium

Front 3

particles vibrate perpendicularly to the direction of the wave motion

Back 3

transverse wave

Front 4

example of a transverse wave

Back 4

a stadium wave

Front 5

particles vibrate parallel to the direction of wave motion

Back 5

longitudinal wave

Front 6

example of longitudinal wave

Back 6

sound waves

Front 7

the highest point above the equilibrium position

Back 7

crest

Front 8

the lowest point below the equilibrium position

Back 8

trough

Front 9

distance between two adjacent similar points of a wave, such as from crest to crest or trough to trough

Back 9

wavelength

Front 10

variable for wavelength

Back 10

lambdu

Front 11

the maximum displacement from equilibrium

Back 11

amplitude

Front 12

the region of a more denser concentration

Back 12

compression

Front 13

are of lesser concentration

Back 13

rarefaction

Front 14

number of cycles that pass a given point in each second

Back 14

frequency, f

Front 15

what is frequency measured in?

Back 15

hertz

Front 16

the time it takes to execute a complete cycle of motion

Back 16

period, T

Front 17

the combination of two overlapping waves

Back 17

superposition

Front 18

what does FM stand for?

Back 18

frequency modulation

Front 19

what does AM stand for?

Back 19

amplitude modulation

Front 20

what is FM measured in?

Back 20

megahertz 10^6 (MHz)

Front 21

What is AM measured in?

Back 21

kilohertz 10^3 (kHz)

Front 22

same parts of two waves meet and are added together to form a larger wave

Back 22

constructive interference

Front 23

different parts of two waves meet and subtract to make a smaller wave

Back 23

destructive interference

Front 24

parts of two waves meet and completely cancel eachother out

Back 24

comple destructive interference

Front 25

standing wave

Back 25

resultant WAVE PATTERN that not move along the string.

Front 26

points where the two waves cancel

Back 26

node

Front 27

halfway between two nodes, largest amplitude occurs

Back 27

antinode

Front 28

what is a sound?

Back 28

longitudinal wave

Front 29

average human can hear this frequency

Back 29

audible

Front 30

the higher the frequency the higher the ______ of the sound.

Back 30

pitch

Front 31

humans can hear _________ Hz

Back 31

20-20,000

Front 32

frequencies less than 20 Hz

Back 32

infrasonic

Front 33

frequencies above 20,000 Hz

Back 33

ultrasonic

Front 34

sound travels this many times faster in water than in air at o degrees celcius

Back 34

4.5

Front 35

as the temperature increases, the speed of sound ________

Back 35

increases

Front 36

approx speed of sound in m/s or mph

Back 36

depends on temp: 330 m/s or 700 mph

Front 37

faster than sound

Back 37

supersonic

Front 38

what you hear when the compressed air hits your ear drum

Back 38

sonic boom

Front 39

sound must be about _____ apart for us to distinguish them as seperate sounds

Back 39

1/10 sec

Front 40

a frequency shift that is the result of relative motion between the source of waves and an observer

Back 40

doppler effect

Front 41

if the source is moving toward the observer the frequency ________, so use _____.

Back 41

increases, subtraction

Front 42

if the source is moving away from the observer the frequency ________, so use _______.

Back 42

decreases, addition

Front 43

measure of loudness

Back 43

decibel level

Front 44

every 10 dB increase is perceived as being ____as loud

Back 44

twice

Front 45

everything will vibrate at a particular frequency

Back 45

natural frequency

Front 46

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

Back 46

resonance ex:pushing someone on a swing