Chap 9

Question 1

Periodic motion

Answer 1

Occurs when vibration of an object is repeated in equal time intervals

Question 2

Mechanical wave

Answer 2

Transfer of energy through a material by particle vibration

Question 3

Medium

Answer 3

Material through which the wave travels. Can be solid liquid or gas

Question 4

A wave is a _________ or a _______ that travels through a medium

Answer 4

Disturbance

Oscillation

Question 5

Waves transfer ______ from one point to another in the medium

Answer 5

Energy

Question 6

Is there permanent displacement of the particles once a wave is passed?

Answer 6

No

Question 7

Different types of waves

Answer 7

Transverse

Longitudinal

Question 8

Transverse waves

Answer 8

The disturbance of the particles is perpendicular to the medium in which it travels

Question 9

Longitudinal waves

Answer 9

Disturbance of the particles is parallel to the medium in which it travels

Question 10

Parts of a transverse wave

Answer 10

Crest
Trough
Wavelength
Amplitude

Question 11

Crest

Answer 11

Medium rises above equilibrium position

Question 12

Trough

Answer 12

Medium falls below equilibrium

Question 13

Wavelength (transverse)

Answer 13

Distance between corresponding points of successive cycles.

Distance between two crests or two troughs

Question 14

Amplitude

Answer 14

Greatest displacement from equilibrium position

Question 15

Parts of a longitudinal wave

Answer 15

Compression
Rare fraction
Wavelength

Question 16

Compression

Answer 16

Particles are closer together than normal

Question 17

Rarefaction

Answer 17

Particles are farther apart than normal

Question 18

Wavelength (longitudinal wave)

Answer 18

Distance between successive compressions or refractions

Question 19

Leading edge of a wave

Answer 19

Wave front

Question 20

Incident wave

Answer 20

a wave moving a way from a source toward a barrier

Question 21

Reflected wave

Answer 21

Wave moving away from a barrier

Question 22

Wave points identical in successive waves are said to be in

Answer 22

Phase

Question 23

Wave pulse

Answer 23

A single disturbance of a medium, either a crest or a trough

Question 24

What energy does a wave pulse have?

Answer 24

Both elastic potential and kinetic

Question 25

As the medium moves from equilibrium position to the top of a wave pulse that section has what energy and why?

Answer 25

Kinetic because it is in motion and EPE because it is being stretched sideways

Question 26

At the top of a wave crest, what energy is there?

Answer 26

Potential is at a max

Question 27

Vibration

Answer 27

Cyclical motion of an object about an equilibrium point