Physical Science Vocab 1

Front 1

Amplitude

Back 1

The extent of displacement from the equilibrium position

Front 2

Beat

Back 2

Rhythmic increase and decrease of volume from constructive and destructive interference

Front 3

Cycle

Back 3

A complete vibration

Front 4

Decibel scale

Back 4

Scale of the intensity of sound from the thershold of human hearing

Front 5

Doppler effect

Back 5

Apparent shift in the frequency of sound due to the relative motion between the source and observer.

Front 6

Frequency

Back 6

The number of cycle of a wave or vibration occuring in one second

Front 7

Fundamental frequency

Back 7

The lowest frequency that can set up standing waves in an air column on a string

Front 8

Hertz

Back 8

Unit of frequency

Front 9

Infrasonic

Back 9

Frequencies less than 20 Hz

Front 10

Longitudinal wave

Back 10

Mechanical disturbance that travels in the same direction as a wave

Front 11

Period

Back 11

The time required for one complete wave

Front 12

Pitch

Back 12

The frequency of a sound wave

Front 13

Reflection

Back 13

The change when life was sound wave bounce back off a boundary

Front 14

Refraction

Back 14

Maybe to a change in the direction of travel of a sound or light wave crossing a boundary

Front 15

Resonance

Back 15

When the frequency of an external Force matches the natural frequency and standing waves are set

Front 16

Reverberation

Back 16

Apparently crease in volume caused by reflection

Front 17

Shock wave

Back 17

A large intense wave disturbance of high pressure

Front 18

Sonic boom

Back 18

Sound wave that piles up into a shock wave when the source meets or exceeds the speed of sound

Front 19

Standing wave

Back 19

When waves of the same frequency established regions of Maximum and zero displacement

Front 20

Tranverse wave

Back 20

A mechanical disturbance that causes particles to move perpendicular to the direction of the wave

Front 21

Ultrasonic

Back 21

Frequencies above 20000 Hz

Front 22

Vibration

Back 22

A back-and-forth motion that repeats itself

Front 23

Wavelength

Back 23

Horizontal distance between wave crests

Front 24

Waves

Back 24

A disturbance or oscillation that moves through a medium