Module 2

Question 1

Why does sound require vibrations ?

Answer 1

-The propagation of a pressure wave
- a sound wave was in time and space
- pressure is both (-) and (+) pressure

Question 2

What is measured by
(g) and is the amount of matter present ?

Answer 2

Mass

Question 3

What is measured by (g/cm3) and is consider to be the gravitational force exerted on a mass by the earth ?
Example : Scale

Answer 3

Weight

Question 4

What is the measured by (N) and is consider to be the amount of mass per unit of volume ?
( also can have a higher density of there is more mass( D=m/v)

Answer 4

Density

Question 5

( Blank) is the ability to resist change to its original shape or volume by its tendency to return to its former volume or shape.

Answer 5

Elasticity

Question 6

Air has a high ( blank ) .

Answer 6

Elasticity

Question 7

All bodies that can vibrate to transmit sound must have ?

Answer 7

mass and elasticity

Question 8

( Blank) Law is the change in length of a material is proportional than the force applied to it .
The harder you pull depends on the stretch of the object
Example : Skin

Answer 8

Hooke’s

Question 9

What is newtons first law of motion ?

Answer 9

Inertia

Question 10

( Blank) is the tendency of a body in motion to remain in motion and the tendency of a body at rest to stay at rest . In the absence of an extra force
- directionally proportional

Answer 10

Inertia

Question 11

More ( blank) = More Inertia
Story time : Van vs. ball
because the van has more mass which mean more weight than the ball , it Also has more inertia meaning it will be hard to more than the ball .

Answer 11

Mass

Question 12

Force- resting postion =

Answer 12

Equilibrium

Question 13

Force applied =

Answer 13

Displacement

Question 14

When force disturbs equilibrium it causes ..

Answer 14

Vibration

Question 15

What comes about as a result of the 2 opposing forces of elasticity and inertia working against each other in order to create vibration ?

Answer 15

Vibratory motion

Question 16

When elasticity is in play , 2 things happen :

Answer 16

1. Compression
2. Rarefaction

Question 17

When elasticity is in play , the first thing that happens is ( blank) , which is the region in space with a high density of particles
- postive pressure

Answer 17

Compression

Question 18

When elasticity is in play , the second thing that happens is ( blank), which is the region in space with less density particles
-negative pressure

Answer 18

Rarefaction

Question 19

Compression and rarefaction CANT NOT work without ?

Answer 19

Elasticity and inertia

Question 20

what is the force applied times the distance moved? (W=Fd )

Answer 20

Work

Question 21

What is stored energy ?

Answer 21

potential energy

Question 22

What is the energy of motion ?

Answer 22

Kinetic energy

Question 23

What is the opposition to motion ?

Answer 23

frictional resistance

Question 24

( Blank) is the max. displacement of the particles of a medium , the distance between baseline and maximum displacement .

Answer 24

Amplitude

Question 25

What relates to loudness ?

Answer 25

Intensity

Question 26

( Blank) is the number of cycles completed per second . This relates to pitch

Answer 26

Frequency

Question 27

( Blank) is the time in seconds that it takes for a vibration to complete one entire cycle of vibration - has to have both (-) and (+)

Answer 27

Period

Question 28

If frequency is going up than ( blank ) is going down and visa vera

Answer 28

period

Question 29

( Blank) is the rate of sound waves propagation on the characteristics of air

Answer 29

Speech of sound

Question 30

What happens when mediums are disturbed ?

Answer 30

The frequency of air molecules depends on the frequency of vibration of the source

Question 31

Cycles per second =

Answer 31

rate of vibratory movement

Question 32

Imagine you have a string with a ball ties to the end . Three things are going to occur before and after the string is moved . First thing is Inertia - The tendency of a body in motion to remain in motion and the tendency of a body at rest to stay at rest . In the absence of an extra force Second thing is Elasticity -The ability to resist change to its original shape or volume by its tendency to return to its former volume or shape. Third thing is Displacement - Force applied This is recognized as the ...

Answer 32

Pendular Motion

Question 33

Transverse Waves

Answer 33

Cause the medium to move perpendicular to the direction of the wave.

Question 34

Longitudinal Waves

Answer 34

Cause the medium to move parallel to the direction of the wave. Best represent a Sound Wave

Question 35

The following steps are an example of : A. You have a tuning fork and their is being force applied to it which cause___________ Displacement

Answer 35

Displacement of Tuning Forks