Exploring Physics Final Review

Question 1

a = f/m

Answer 1

second law of motion

Question 2

A feather and lump of lead will fall at the same speed in

Answer 2

vacuum

Question 3

Acceleration is found by dividing the

Answer 3

change in speed by the change in time

Question 4

adjusts light to the best focus.

Answer 4

lens

Question 5

An object with a ___ charge has more protons than electrons.

Answer 5

positive

Question 6

brings light to a focus.

Answer 6

cornea

Question 7

carries information from the eye to the brain.

Answer 7

optic nerve

Question 8

controls the amount of light that enters the eye.

Answer 8

iris

Question 9

Density is equal to mass divided by

Answer 9

volume

Question 10

developed a model of the atom and electron orbits

Answer 10

Niels Bohr

Question 11

developed the uncertainty principle

Answer 11

Werner Heisenberg

Question 12

Doubling mass of a moving object ___ its kinetic energy.

Answer 12

doubles

Question 13

Doubling velocity of a moving object makes its kinetic energy

Answer 13

four times as great

Question 14

explained black body radiation by using energy quanta

Answer 14

Max Planck

Question 15

f = m x a

Answer 15

force equation

Question 16

f_ab = -f_ba

Answer 16

third law of motion

Question 17

Heat is a type of

Answer 17

energy

Question 18

Heat is the motion of ___

Answer 18

atoms and molecules

Question 19

How can scientist measure temperatures higher than 1,700^o?

Answer 19

They can measure higher temperatures with electrical conductivity and color of light emitted by glowing substance.

Question 20

I = f x t

Answer 20

definition of impulse

Question 21

Inertia is a property of matter that resists changing its

Answer 21

velocity

Question 22

is a surface of light sensitive nerves.

Answer 22

retina

Question 23

is sensitive to light and can distinguish color.

Answer 23

cones

Question 24

is sensitive to light but cannot see color.

Answer 24

rods

Question 25

is the opening through which light enters the eye.

Answer 25

pupil

Question 26

James Prescott Joule found how mechanical energy due to motion compares to ___ energy.

Answer 26

heat

Question 27

Label the four forces acting on an airplane in flight.

Answer 27

Question 28

Momentum is the mass of an object times its

Answer 28

velocity

Question 29

If f = 0 then a = 0

Answer 29

first law of motion

Question 30

p = m x v

Answer 30

definition of momentum

Question 31

Physics is the science that explores how energy acts on

Answer 31

matter

Question 32

Pressure times volume of any gas divided by the temperature is a constant.

Answer 32

Ideal gas law

Question 33

proposed matter waves and calculated their wavelengths

Answer 33

Louis de Borglie

Question 34

Rank theses waves in order from lowest frequency (longest wavelength) to highest frequency (shortest wavelength): blue visible light AM radio raves X rays infrared light

Answer 34

AM radio waves infrared light blue visible light X rays

Question 35

State Ohm's law

Answer 35

current = voltage/resistance, or in words: current is directly proportional to voltage and inversely proportional to resistance.

Question 36

State the second law of motion

Answer 36

The acceleration of an object is directly proportional to the force acting on it and inversely proportional to its mass.

Question 37

State the third law of motion

Answer 37

to every action there is an equal and opposite reaction.

Question 38

Thales of Melitus discovered that ___ could be given a charge of static electricity.

Answer 38

amber

Question 39

The first person to state that uranium could undergo fission and produce a self-sustaining chain reaction

Answer 39

Lise Meiter

Question 40

The first scientist to generate electromagnetic waves was

Answer 40

Rudolf Hertz

Question 41

The force that pushes electrons around a circuit is

Answer 41

voltage

Question 42

The frequency of a sound is known as its

Answer 42

pitch

Question 43

The Heisenberg uncertainty principle states that the precise position, mass, and ___ cannot be determined exactly.

Answer 43

velocity

Question 44

The lifting force acting on a solid object immersed in water is equal to the weight of the water shoved aside by the object.

Answer 44

Archimedes' principle of buoyancy

Question 45

The loudness of sound is measured in

Answer 45

decibels

Question 46

The purpose of a moderator is to

Answer 46

slow neutrons

Question 47

The scientist who developed four equations that summarized electromagnetism was

Answer 47

James Clerk Maxwell

Question 48

The scientist who discovered that pure water has a fixed boiling and freezing temperature was

Answer 48

Daniel Fahrenheit

Question 49

The study of sound is known as

Answer 49

acoustics

Question 50

The three factors that determine the heat contained in an object are type of substance, mass, and

Answer 50

temperature

Question 51

The three properties of a sound are frequency, intensity, and \_\_\_.

Answer 51

quality

Question 52

The two most common substances used in thermometers are colored alcohol and

Answer 52

mercury

Question 53

The velocity of a fluid and its pressure are inversely related.

Answer 53

Bernoulli's principle

Question 54

The volume of a gas is inversely proportional to the pressure.

Answer 54

Boyle's law

Question 55

To calculate speed, divide distance by

Answer 55

1time

Question 56

To reduce the heating effect of electricity in wires, the current is reduced but the ___ is increased.

Answer 56

voltage