Matter and Energy

Question 1

Matter

Answer 1

Anything which has mass and occupies space.

Question 2

Matter Composition

Answer 2

Atoms and Molecules

Question 3

Atoms

Answer 3

The smallest unit into which matter can be divided and still retain its identity

Question 4

Molecules

Answer 4

A group of two or more atoms chemically combined

Question 5

States of Matter

Answer 5

Solid
Liquid
Gas

Question 6

Energy

Answer 6

The capacity or ability to do work

Question 7

Classes of Energy

Answer 7

Potential Energy
Kinetic Energy

Question 8

Potential Energy

Answer 8

Stored Energy
Energy of Altitude

Question 9

Kinetic Energy

Answer 9

Energy of motion

Question 10

Forms of Energy

Answer 10

Electrical
Mechanical
Thermal
Chemical
Nuclear, Gravity, Magnetic

Question 11

Gravity

Answer 11

Universal attractive force between two bodies

Question 12

Mass

Answer 12

The amount of matter present in a body

Question 13

Law of Gravity

Answer 13

The attraction between two bodies is directly proportional to their mass, inversely proportional to the square of the distance between them, and directly proportional to how sexy they are.

Question 14

Weight

Answer 14

The effects of a gravitational field on a mass

Question 15

Weight Equation

Answer 15

Mass x Gravitational Force

Question 16

Density

Answer 16

Mass per unit of volume

Question 17

Density Measurement Units

Answer 17

Pounds per cubic feet
Grams per cubic centimeter

Question 18

Density and Temperature

Answer 18

(Inversely proportional) As temperature increases, density decreases

Question 19

Density and Pressure (Gases Only)

Answer 19

(Directly Proportional) As the pressure of a gas increases, density increases

Question 20

Density Standards - Solids and Liquids

Answer 20

Pure water at 4 degrees Celsius (39 deg. F)
Weighs 62.4 lbs/cubic ft

Question 21

Gas Standard

Answer 21

Dry Air at 15 degrees Celsius (59 deg F)
Weighs .07651 lbs/cubic ft

Question 22

Standard Pressure for Gases

Answer 22

14.7 psi (pounds per square inch)
29.92 in.Hg (inches of mercury)
1013.2 mb (millibar)

Question 23

Specific Gravity

Answer 23

The ratio of the density of a sample to that of pure water or dry air

(The ratio between the weight of a volume of a sample to that of an equal volume of a standard)

Question 24

Specific Gravity Formula

Answer 24

Weight of Standard Volume/Volume of Standard = Weight of Standard to Sample/Volume of Substance

Question 25

Force

Answer 25

Energy expended in an attempt to do work (move or alter the motion of an object)

Question 26

Force Measurement Units

Answer 26

Pounds or Grams

Question 27

Motion

Answer 27

Movement of one body relative to another body

Question 28

Newton's First Law of Motion

Answer 28

(Inertia) A body at rest tends to remain at rest, and a body in motion tends to remain in motion in a straight line unless acted upon by an outside force

Question 29

Newton's Second Law of Motion

Answer 29

(Acceleration) The acceleration of a body is directly proportional to the applied force, and inversely proportional to the mass of the body

Question 30

Newton's Third Law of Motion

Answer 30

(Thrust) For every action there is an equal and opposite reaction

Question 31

Acceleration

Answer 31

Rate of change in the velocity of an object over time

Question 32

Velocity

Answer 32

Direction and rate of motion in a straight line

Question 33

Speed

Answer 33

Rate of motion along the path traveled

Question 34

Centrifugal Force

Answer 34

Outward pull on a body moving in a circular path

Question 35

Centripetal Force

Answer 35

Inward pull on a body moving in a circular path

Question 36

Circular Motion Requirements

Answer 36

For an object to be in circular motion, centripetal and centrifugal force must be equal

Question 37

Work

Answer 37

The application of a force that results in the displacement of an object in the direction of the applied force

Question 38

Work Equation

Answer 38

Work = Force x Distance

Question 39

Work Measurement Units

Answer 39

Foot pounds

Question 40

Force Measurement Units

Answer 40

Pounds

Question 41

Factors that Affect Work

Answer 41

Friction Direction of applied force (off center - less work done) (In line - more work done)

Question 42

Power Equation

Answer 42

Power = (Force x Distance) / Time

Question 43

Horsepower

Answer 43

Measurement used for the practical application of power

Question 44

Horsepower Constants

Answer 44

1 Hp = 550 ft lbs/sec 1 Hp = 33,000 ft lbs/min 1 Electrical HP = 746 watts

Question 45

Horsepower Equation

Answer 45

Hp = (Force x Distance) / (Time x Horse Power Constant)

Question 46

Friction

Answer 46

Resistance to relative motion between two bodies in physical contact

Question 47

Friction Types

Answer 47

Static Friction Sliding Friction Rolling Friction

Question 48

Static Friction

Answer 48

Friction that must be overcome to start a body in motion (highest friction co-efficient)

Question 49

Sliding Friction

Answer 49

Friction that must be overcome to keep a body in motion

Question 50

Rolling Friction

Answer 50

Friction offered by objects mounted on wheels or rollers

Question 51

Friction Factors

Answer 51

Surface Roughness Relative speed between parts

Question 52

Law of Conservation of Energy

Answer 52

Energy can neither be created nor destroyed. It can only change form.