Chapter 15-20 26 and 27

Question 1

The period depends only on the length of the pendulum and the acceleration due to _____

Answer 1

Gravity

Question 2

Vibration of a pendulum has a back and fourth swing that takes time and is called

Answer 2

Period

Question 3

A _____ is the pictorial representation of a wave

Answer 3

Sine Curve

Question 4

The ____ refers to the distance from the midpoint to the crest of the wave

Answer 4

Amplitude

Question 5

The ____ of a wave is the distance from the top of one crest to the top of the next one

Answer 5

Wavelength

Question 6

_____ of a vibrating pendulum or object on a spring specifies the number of back and forth vibrations it makes within a given time

Answer 6

Frequency

Question 7

What is the formula for frequency and its units

Answer 7

f = 1/T HZ

Question 8

The energy transferred from a vibrating source to a receiver is carried by a disturbance in a

Answer 8

medium

Question 9

Sound waves move at 330 m/s to 350 m/s in air (depends on _____)

Answer 9

Temperature

Question 10

In the formula for speed of a wave v = f λ

Answer 10

v = velocity
f = frequency
λ = wavelength

Question 11

What type of waves are radio waves and light waves

Answer 11

Transverse waves

Question 11

What type of waves are sound waves

Answer 11

Longitudinal waves

Question 12

When the crest of one wave overlaps the crest of another, their individual effects add together and is called ___ _interference

Answer 12

Constructive

Question 13

The _____ is the change in frequency of a wave due to the motion of the source or the receiver

Answer 13

Doppler Effct

Question 14

When the source is approaching the receiver, there is a shorter distance between wave crest, so the waves are at a _____ frequency (picture a graph)

Answer 14

Higher

Question 15

all sounds are produced by the ____ of material objects which then send a disturbance through a surrounding _____, usually air, in the from of ____ waves

Answer 15

Vibrations, medium, Longitudinal

Question 16

Our subjective impression about the frequency of the sound is

Answer 16

pitch

Question 17

Sound waves that are
below 20 Hz are called _____ and frequencies above 20,000 Hz are called ______

Answer 17

Infrasonic
Ultrasonic

Question 18

Sound travels fastest through ____ and not at all in a ___

Answer 18

Solids,
Vacuum

Question 19

The speed of sound in dry air at 20 degrees C is about

Answer 19

340 m/s

Question 20

In elastic materials like ____ the atoms are relatively close so they transmit sound better

Answer 20

Steel

Question 21

The intensity of sound is measured in

Answer 21

Decibel

Question 22

When the frequency of a forced vibration on an object matches the objects natural frequency a dramatic increase amplitude occurs and is called

Answer 22

Resonance

Question 23

Calculate the frequency of a pendulum that has a period of 10 seconds

Answer 23

0.10 Hz

Question 24

Calculate the speed of the waves in the water that are 0.5 meters apart and have passes by twice each second

Answer 24

1 m/s

Question 25

Lights consists of ____ massless bundles of concentrated electromagnetic energy later called ____

Answer 25

Particles Photons

Question 26

Light has a dual nature part ___ and part wave

Answer 26

Particle

Question 27

The speed of light is

Answer 27

3 X 10^8 m/s

Question 28

A ______ is the distance that light travels in one year

Answer 28

Light year

Question 29

What type of energy is emitted by vibrating electrons in atoms

Answer 29

Light

Question 30

The energy emitted by electrons travels in a wave that is partly electric and partly magnetic and is called _____ wave

Answer 30

Electromagnetic

Question 31

What type of materials allow light to pass through it

Answer 31

transparent

Question 32

What type of materials absorb light without reemission

Answer 32

opaque

Question 33

Ultraviolet and infrared rays do not travel through

Answer 33

glass

Question 34

What is the quantity that tells how hot or cold something is

Answer 34

temperature

Question 35

What do you call the type of energy that is transferred from one object to another because of a temperature difference between them

Answer 35

Heat

Question 36

The most common unit of measure of heat is the

Answer 36

Calorie

Question 37

What has a much higher capacity for storing energy that most common materials

Answer 37

Water

Question 38

When there is no movement of the atoms in a substance, the substance is at

Answer 38

absolute zero

Question 39

What is the measure of the amount of disorder

Answer 39

entropy

Question 40

Which law is generally stated as: Whenever heat is added to a system, it transforms to an equal amount of some other form of energy

Answer 40

First law of Thermodynamics

Question 41

The phase of matter depends upon its ___ that is exerted upon ot

Answer 41

Temperature and pressure

Question 42

2nd LAw of thermodynamics states that the flow of heat is always from

Answer 42

Hot to cold

Question 43

When atoms or molecules in matter move faster and increase it's kinetic energy it becomes

Answer 43

Warmer

Question 44

Nearly all mater expands when its temperature ____ and contracts when it _____

Answer 44

Increase decreases

Question 45

Good insulators ____ the transfer of heat

Answer 45

Delay

Question 46

Newton's Law of cooling: The rate of cooling of an object is approximately ____ the temperature difference between the objects and its surroundings

Answer 46

Proportional to

Question 47

this light is a combination of all colors and it reflects all light frequencies

Answer 47

White

Question 48

This is the absence if light because they absorb all light frequencies

Answer 48

Black

Question 49

tHe sky is blue because when light is scattered in the atmosphere by tiny particles the scattered light is at a ____ frequency so we see blue

Answer 49

Higher