# Essential Physics Practice Exam

72 Questions

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Take this quiz to help you prepare for your final. You will want a calculator and your equation list from your review handy. I will not see the results of your quiz unless you print out or email me the completion certificate. Do this if you want some bonus points! (email: rachael. [email protected] Org)

Related Topics
• 1.
All Energy adheres to the Law of Conervation of Energy. Why is a light bulb not 100% efficient?
• A.

New light bulbs are 100% efficient

• B.

All energy transfers lose energy in the form of heat

• C.

Tungsten wire in light bulbs are weak

• D.

Of all energy transfers, light bulbs are least efficient

• 2.
What is the potential energy of a 80 kg tourist at the top of a building that is 400 m high?
• A.

9.8 J

• B.

320000 J

• C.

32000 J

• D.

313600 J

• 3.
Energy produced by the sun is
• A.

Nuclear

• B.

Chemical

• C.

Electrical

• D.

Mechanical

• 4.
If the velocity of an object is 1m/s, then increases to 2 m/s, what will happen to the kinetic energy of the object?
• A.

It is reduced by 2

• B.

It stays the same

• C.

It will double

• D.

It will be multiplied by 4

• 5.
Energy is measured in
• A.

Newtons

• B.

Amps

• C.

Joules

• D.

Kilograms

• 6.
Ultraviolet light is an example of
• A.

Heat energy

• B.

Electromagnetic energy

• C.

Potential energy

• D.

Electrical energy

• 7.
A magic turtle has a mass of 47kg and can run 31 m/s. What is his kinetic energy?
• A.

22583.5 J

• B.

68479 J

• C.

1739 J

• D.

34239.5 J

• 8.
Pedaling a bike is an example of
• A.

Potential energy

• B.

Thermal energy

• C.

Mechanical energy

• D.

Heat energy

• 9.
When you drag your book across a table, friction will convert
• A.

Kinetic energy to potential energy

• B.

Kinetic energy to thermal energy

• C.

Potential energy to wavelengths

• D.

Potential energy to kinetic energy

• 10.
In the energy transfer diagram of a battery and a light bulb,
• A.

Heat energy is transferred to chemical energy

• B.

Chemical energy is transferred to mechanical energy

• C.

Electrical energy is transferred to mechanical energy

• D.

Electrical energy is transferred to light (electromagnetic) energy

• 11.
Point A represents matter at a solid. What phase change is happening at point B?
• A.

Freezing

• B.

Melting

• C.

Sublimation

• D.

Vaporization

• 12.
Point C represents the melting point of a substance. What would Point E represent?
• A.

Freezing

• B.

Melting

• C.

Sublimation

• D.

Vaporization

• 13.
Which one of the following is a conductor?
• A.

Straw

• B.

Metal

• C.

Wool

• D.

Wool

• 14.
A charged balloon can pick up small bits of paper, proving that its ____ force is stronger than Earth's gravitational force.
• A.

Voltage

• B.

Magnetic field

• C.

Electrical force

• D.

Current

• 15.
The phase of matter with a definite chape and volume is
• A.

Plasma

• B.

Liquid

• C.

Gas

• D.

Solid

• 16.
The phase with the most energetic molecules is
• A.

Solid

• B.

Liquid

• C.

Gas

• D.

Absolute zero

• 17.
When submimation occurs,
• A.

Solid is converted to gas

• B.

Solid is converted to liquid

• C.

Gas is converted to liquid

• D.

Water melts

• 18.
Ohms () is the unit of measurement for
• A.

Current

• B.

Resistance

• C.

Voltage

• D.

Temperature

• 19.
Like charges
• A.

Attract

• B.

Repel

• C.

Balance one another

• 20.
Which temperature scale does water have a boiling point of 100 and a freezing point of 0
• A.

Fahrenheit

• B.

Celsius

• C.

Kelvin

• D.

Rankine

• 21.
Tension breaker: Pizza is
• A.

Delicious

• B.

Just ok

• C.

Gross

• D.

For sissies

• 22.
The way in which energy travels the length of a metal is
• A.

• B.

Convection

• C.

Conduction

• D.

Conviction

• 23.
The temperature in which particles would not be moving
• A.

32 degrees F

• B.

-273 Kelvin

• C.

0 degrees Celsius

• D.

Absolute Zero

• 24.
When using the equation I=V/R, what happens to the current when resistance is doubled?
• A.

The current decreases

• B.

The current increases

• C.

The current stays the same

• D.

The current alternates

• 25.
Current is measured using
• A.

Coulombs

• B.

Amps

• C.

Ohms

• D.

Volts

• 26.
As bulbs are added to a ___ circuit, they shine less brightly
• A.

Closed

• B.

Open

• C.

Parallel

• D.

Series

• 27.
The circuit shown below is
• A.

An open circuit

• B.

A series circuit

• C.

A parallel circuit

• D.

Both series and parallel circuits

• 28.
What voltage produces a current of 300 amps with a resistance of 20 Ohms?
• A.

6000 volts

• B.

600 volts

• C.

15 volts

• D.

0.15 volts

• 29.
A 9 volt battery produces a current of 45 amperes. What is the resistance?
• A.

405 ohms

• B.

5 ohms

• C.

0.2 ohms

• D.

There is no resistance

• 30.
What is an example of a transverse wave?
• A.

Hand wave

• B.

Sound wave

• C.

Ocean wave

• D.

Electromagnetic wave

• 31.
The distance a wave travels in a certain amount of time is the ___
• A.

Wavelength

• B.

Speed

• C.

Frequency

• D.

Amplitude

• 32.
In this diagram, wavelength is labeled __
• A.

A

• B.

B

• C.

C

• D.

D

• 33.
In this diagram, amplitude is lableled __
• A.

A

• B.

B

• C.

C

• D.

D

• 34.
Sound waves with frequencies above the normal human range of hearing are
• A.

Infrasound

• B.

Untrasound

• C.

Decibels

• D.

Resonance

• 35.
Bats use ____ to locate food and navigate
• A.

Acoustics

• B.

Resonance

• C.

Echolocation

• D.

Infrared

• 36.
Wavelength is measured in
• A.

Meters

• B.

Hertz

• C.

Decibels

• D.

Meters per second

• 37.
Frequency is measured in
• A.

Meters

• B.

Hertz

• C.

Decibels

• D.

Meters per second

• 38.
A wave has a wavelength of  3 m and a frequency of 6Hz. What is the speed of the wave?
• A.

2 m/s

• B.

9 m/s

• C.

18 m/s

• D.

0.5 m/s

• 39.
The speed of a wave is 20m/s and the frequency is 100Hz. What is the wavelength?
• A.

0.2m

• B.

5m

• C.

2000m

• D.

2m

• 40.
Why do you hear thunder after you see lightning?
• A.

Light and sound travel at the same speeds

• B.

Sound is faster than light

• C.

Light is faster than sound

• D.

Sound is faster in certain temperatures

• 41.
____ waves can transfer energy without a medium
• A.

Sound

• B.

Electromagnetic

• C.

Longitudinal

• D.

Surface

• 42.
Its harder to hear at the back of the auditorium because
• A.

The intensity of the wave decreases as distance from the source increases

• B.

The frequency of the wave decreases as distance from the source increases

• C.

The intensity of the wave increases as distance from the source increases

• D.

The frequency of the wave increases as distance from the source increases

• 43.
The loudness of a sound depends upon the wave's
• A.

Frequency

• B.

Amplitude

• C.

Pitch

• D.

Speed

• 44.
Sound is a ___ wave
• A.

Surface

• B.

Transverse

• C.

Longitudinal

• D.

Electromagnetic

• 45.
All electro magnetic waves have the same ___
• A.

Speed

• B.

Wavelength

• C.

Frequency

• D.

Amplitude

• 46.
____ waves would cause a sunburn
• A.

Gamma

• B.

• C.

UV

• D.

X-ray

• 47.
____ waves have the shortest wavelengths
• A.

Gamma

• B.

• C.

UV

• D.

X-ray

• 48.
A police using a radar gun is using ___ waves
• A.

Gamma

• B.

• C.

UV

• D.

X-ray

• 49.
Electromagnetic waves with the longest wavelengths have
• A.

The highest energy

• B.

The lowest frequency

• C.

The most damaging effects

• D.

The highest frequency

• 50.
When light hits and bounces off a bumpy, uneven surface diffuse ____ occurs
• A.

Refraction

• B.

Absorption

• C.

Refection

• D.

Disbursement

• 51.
When light passes from air to water,
• A.

It speeds up

• B.

It slows down

• C.

It continues at the same speed

• D.

It stops completely

• 52.
When white light strikes a black object,
• A.

No light is reflected

• B.

All light is reflected

• C.

Some light is reflected

• D.

Light passes through the object

• 53.
Opaque objects reflect some wavelengths of light a ___ the rest
• A.

Refract

• B.

Absorb

• C.

Diffuse

• 54.
• A.

A real image because its inverted

• B.

A real image because its upright

• C.

A virtual image because its inverted

• D.

A virtual image because its upright

• 55.
Clear glass is ____ while frosted glass is ___
• A.

Opaque, transparent

• B.

Translucent, opaque

• C.

Translucent, transparent

• D.

Transparent, translucent

• 56.
The sunset appears red beceause
• A.

All UV light is absorbed except red

• B.

The other colors of light have longer wavelengths and get scattered first

• C.

The other colors of light have shorter wavelengths and get scattered first

• D.

All UV light is red

• 57.
As two objects move apart, what happens to the force of gravity between them?
• A.

It increases

• B.

It decreases

• C.

It stays the same

• 58.
Your weight is different than your mass because
• A.

Mass is the force of gravity acting on your weight

• B.

Weight is the force of gravity acting on your mass

• C.

Weight takes kinetic energy into account

• D.

Weight and mass are always the same

• 59.
A car moving at constant velocity has what forces acting upon it? (Check all that apply)
• A.

Friction

• B.

Air resistance

• C.

Gravity

• 60.
The push or pull on an object causing it to accelerate is
• A.

Speed

• B.

Density

• C.

Force

• D.

Mass

• 61.
The tendency of matter to resist a change in motion is ___
• A.

Gravity

• B.

Inertia

• C.

Friction

• D.

Resistance

• 62.
An 10000 N hippo is free falling and deploys a parachute that provides 6000 N of air resistance. What is the net force acting on the hippo?
• A.

4000 N down

• B.

4000 N up

• C.

16000 N down

• D.

16000 N up

• 63.
Your computer exerts a downward force on the desk and the desk exerts an
• A.

Unequal force in the opposite direction

• B.

Unequal force in the same direction

• C.

Equal force in the same direction

• D.

Equal force in the opposite direction

• 64.
The average speed of a car that travels 150 km in 3 hours is
• A.

10 km/h

• B.

25 km/h

• C.

50 km/h

• D.

100 km/h

• 65.
How much net force is needed to accelerate a 5000kg truck at 4 m/?
• A.

2000N

• B.

4000N

• C.

20000N

• D.

1250N

• 66.
A race horse goes from 5 m/s to 15 m/s in 2 seconds. What was its acceleration?  ( NOTE: All answers are in m/....It takes forever to get this program to do superscripts!!)
• A.

5

• B.

10

• C.

15

• D.

2

• 67.
What is the speed of the car plotted on this graph?
• A.

5 m/s

• B.

10 m/s

• C.

20 m/s

• D.

50 m/s

• 68.
Between A and B the car
• A.

Slowed down

• B.

Sped up

• C.

• D.

Stopped

• 69.
Between which interval was the greatest negative acceleration?
• A.

AB

• B.

BC

• C.

CD

• D.

DE

• 70.
How many meters did the car travel between A and B?
• A.

0m

• B.

10m

• C.

50m

• D.

100m

• 71.
• A.

Constant acceleration and constant speed

• B.

Changing acceleration and constant speed

• C.

Changing acceleration and changing speed

• D.

Constant acceleration and changing speed

• 72.
• A.

Rotation

• B.

Revolution

• C.

Circular motion