Physics Unit 4 -Sound and Waves A.

Question 1

Transverse VIBRATION

Answer 1

Object vibrates at RIGHT ANGLES to its line of rest
Ex. swing, clock pendulum

Question 2

Periodic Motion

Answer 2

Motion that is repeated at equal time intervals

Question 3

Amplitude

Answer 3

Max distance the vibrating object moves from its rest position (^energy=^A)

Question 4

Cycle

Answer 4

One complete back and forth vibration of the object (N)

Question 5

Longitudinal VIBRATION

Answer 5

Object vibrates PARALLEL to its line of rest (ex. spring/bungee)

Question 6

Torsional Vibration

Answer 6

Object vibrates AROUND its line of rest (ex. washing machine agitator)

Question 7

Period

Answer 7

(T) - Time required to complete one cycle [measured in seconds]

Question 8

Frequency

Answer 8

[f] - Number of cycles per second measured in Hz

Question 9

Porportionalities between f & T

Answer 9

f is inversely proportional to T and vice versa

Question 10

What are waves?

Answer 10

Repeated vibrations that move through space and time

Question 11

What is the material that waves move through called?

Answer 11

medium

Question 12

Wave pulses

Answer 12

TRANSFERS of energy moving from one location to another without permanently moving the medium

Question 13

Transverse Wave

Answer 13

Particles of the medium vibrate perpendicular to the direction of the wave

Question 14

Crest

Answer 14

positive amplitude segment

Question 15

Trough

Answer 15

Negative amplitude segment

Question 16

Wavelength

Answer 16

Distance between any two points on the wave where the motion is repeated

Question 17

Longitudinal Waves

Answer 17

Particles of the medium vibrate parallel to the direction of the wave

Question 18

Rarefraction

Answer 18

Segment where particles of the medium are further apart

Question 19

Compression

Answer 19

Segment where particles of the medium are closer together

Question 20

Universal Wave Equation rule

Answer 20

speed of the wave is constant as long as medium it travels in remains constant

Question 21

Phase

Answer 21

How two vibrating objects with the same amplitude and frequency vibrate relative to each other