Finals Review

Question 1

unit for force

Answer 1

newtons

Question 2

unit for power

Answer 2

watts

Question 3

unit for work

Answer 3

joules

Question 4

unit for mass

Answer 4

kilograms/grams

Question 5

units for temperature

Answer 5

Celsius, Fahrenheit, Kalvins

Question 6

unit for charge

Answer 6

coulombs

Question 7

unit for electrical resistance

Answer 7

ohms

Question 8

force/area =

Answer 8

pressure

Question 9

a ____ is equivalent to 1 vibration per second

Answer 9

hertz

Question 10

a(n) _____ is equivalent to 1 coulomb of charge

Answer 10

ampere

Question 11

the distance from the top of one crest to the top of the next crest

Answer 11

wavelength

Question 12

the distance from the midpoint to the crest of the wave

Answer 12

amplitude

Question 13

force x distance =

Answer 13

work

Question 14

work done/time interval =

Answer 14

power

Question 15

lever arm x force =

Answer 15

torque

Question 16

the electrical force decreases inversely as the square of the distance between charged bodies.
Increase in distance will decrease the force.
Increase in charge will increase the force.

Answer 16

Coulomb’s Law

Question 17

Electrical forces can be ___ or ____.

Answer 17

attractive or repulsive

Question 18

the combination of 2 or more forces acting on a object.

ie. force + force + force = _____

Answer 18

net force

Question 19

transferring electrons from on place to another

Answer 19

charging

Question 20

when one material rubs against another to create a charge

Answer 20

friction

Question 21

electrons transferred from one material (negative charge) to another (neutral) by touching to create a charge.

Answer 21

contact

Question 22

redistribution of electric charges in and on objects caused by the electrical influence of a charged object close by, but not in contact to create a charge

Answer 22

induction

Question 23

materials that acquire zero resistance to flow of charge

Answer 23

superconductors

Question 24

material where electrons are not anchored to neclei of particular atoms, but is free to wander the material

Answer 24

conductors

Question 25

material that can be made to behave sometimes as an insulator and sometimes as a conductor

Answer 25

semiconductors

Question 26

material where the electrons are tightly bound and belong to particular atoms

Answer 26

insulator

Question 27

electrons in circuit are moved in one direction and then in the opposite direction, alternating to and fro about relatively fixed positions

Answer 27

alternating current AC

Question 28

flowing of charges in one direction

Answer 28

direct current DC

Question 29

current in a circuit is directly proportional to the voltage established across the circuit and is inversely proportional to the resistance of the circuit. Current = voltage/distance

Answer 29

Ohm's Law

Question 30

The greater the voltage, the greater the _____.

Answer 30

current

Question 31

The greater the resistance, the small the ____.

Answer 31

current

Question 32

The space around every electrically charged body. Direction of the field is defined to be the direction in which a small positive test charge at rest would be pushed. Is also the storehouse of energy and can be shielded by various materials.

Answer 32

Electrical field

Question 33

____ has a defined volume, but not a defined shape.

Answer 33

liquid

Question 34

quantity that requires both magnitude and direction

Answer 34

vector quantity

Question 35

quantity that can be described by magnitude only

Answer 35

scalar quantity

Question 36

pressure exerted by a fluid at equilibrium at a given point within the fluid due to the force of gravity. Pressure increases when depth increase

Answer 36

hydrostatic pressure

Question 37

force divided by area over which the force is exerted

Answer 37

pressure

Question 38

loss of weight experienced by objects submerged in a liquid

Answer 38

buoyancy

Question 39

the property of fluid to resist motion

Answer 39

viscosity

Question 40

the rise of liquid in a fine, hollow tube or in a narrow space

Answer 40

capillarity

Question 41

poking a hole in a full 2 liter of water is an example of:

Answer 41

hydrostatic pressure

Question 42

pumping up a bike tire is an example of:

Answer 42

pressure

Question 43

a floating rubber ducky is an example of:

Answer 43

buoyancy

Question 44

milkshakes melting and becoming easier to drink is an example of:

Answer 44

decreasing viscosity

Question 45

accidentally dipping your sleeve in water, resulting in the water rising up the sleeve to an extent is an example of:

Answer 45

capillarity

Question 46

when an object is submerged, the water exerts an upward force on the object that is exactly opposite to the direction of gravity's pull

Answer 46

buoyant force

Question 47

Law where heat always flows hot to cold

Answer 47

2nd law of thermodynamics

Question 48

mass x velocity =

Answer 48

Momentum

Question 49

every body attracts every other body with a force that, for any 2 bodies, is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers. Force = mass1 x mass2 / distance squared

Answer 49

Law of universal gravitation

Question 50

the property of an object to resist changes in its rotational state of motion. An object rotating about an axis tends to remain rotating about the same axis unless interfered with by some external force

Answer 50

rotational inertia

Question 51

when an electron is raised to a higher energy level

Answer 51

excitation

Question 52

when an excited electron returns to its lower energy state while emitting radiant energy

Answer 52

de-excitation

Question 53

when 2 waves overlap and their individual effects add together to produce a wave of increased amplitude

Answer 53

constructive interference

Question 54

when the crest of one wave overlaps with the trough of another, their individual effects are reduced

Answer 54

destructive interference

Question 55

change in velocity / time interval =

Answer 55

acceleration

Question 56

net force/mass =

Answer 56

acceleration (Newton's 2nd Law)

Question 57

To every action there is always an opposed equal reaction. Neither force exists without the other

Answer 57

Newton's 3rd Law

Question 58

Every object continues in its state of rest, or of uniform motion in a straight line unless it is compelled to change the state by force impressed on it.

Answer 58

Newton's 1st law | Law of inertia

Question 59

____ waves require a medium to travel through

Answer 59

sound

Question 60

energy stored and held in readiness

Answer 60

potential energy

Question 61

heat transfer through objects touching. Objects with loose outer electrons conduct heat well.

Answer 61

conduction

Question 62

heat transfer due to actual motion of the fluid/gas. As fluid is heated from below, the molecules at the bottom begin moving faster, spreading apart more, becoming less dense, and are buoyed upward

Answer 62

convection

Question 63

heat transfer emitted through electromagnetic waves. Often in the form of infrared waves

Answer 63

radiation