unit 4 exam physics materials from elearning-gizmo...

Unit 4 Exam Physics

Materials from elearning-gizmo assessments

Based on the setup below, which of the following

statements is true? (Assume the car starts at rest and

there is no friction.)

a. The car will easily smash the egg.

b. The car will just barely crack the egg.

c. The car will touch the egg but won't break it.

d. The car will never reach the egg.

Based on the setup below, which of the following

statements is true? (Assume the car starts at rest and

there is no friction.)

a. The car will easily smash the egg.

b. The car will just barely crack the egg.

c. The car will touch the egg but won't break it.

d. The car will never reach the egg.

A 0.05-kg car starts from rest at a height of 0.95

m. Assuming no friction, what is the kinetic

energy of the car when it reaches the bottom of

the hill? (Assume g = 9.81 m/s2.)

A. 0.466 J

B. 0.308 J

C. 4.317 J

D. 0.0475 J

A 0.05-kg car starts from rest at a height of 0.95

m. Assuming no friction, what is the kinetic

energy of the car when it reaches the bottom of

the hill? (Assume g = 9.81 m/s2.)

A. 0.466 J

B. 0.308 J

C. 4.317 J

D. 0.0475 J

Suppose a 0.04-kg car traveling at 2.00 m/s can

barely break an egg. What is the minimum speed a

0.08-kg car would need to have in order to break the

A. 1.42 m/s

B. 1.00 m/s

C. 0.80 m/s

D. 2.00 m/s

Suppose a 0.04-kg car traveling at 2.00 m/s can

barely break an egg. What is the minimum speed a

0.08-kg car would need to have in order to break the

A. 1.42 m/s

B. 1.00 m/s

C. 0.80 m/s

D. 2.00 m/s

A 1-kg car and a 2-kg car are both released from the top of the same

hill and roll down a frictionless track. At the bottom of the hill, which car

will have the greater speed? Which car will have the greater kinetic

energy?

A. The 1-kg car will have greater speed, and the 2-kg car will have

greater kinetic energy.

B. The 2-kg car car will have greater speed, and the 1-kg car will

have greater kinetic energy.

C. The cars will have equal speeds and equal kinetic energies.

D. The cars will have equal speeds and the 2-kg car will have

A 1-kg car and a 2-kg car are both released from the top of the same

hill and roll down a frictionless track. At the bottom of the hill, which car

will have the greater speed? Which car will have the greater kinetic

energy?

A. The 1-kg car will have greater speed, and the 2-kg car will have

B. The 2-kg car car will have greater speed, and the 1-kg car will

have greater kinetic energy.

C. The cars will have equal speeds and equal kinetic energies.

D. The cars will have equal speeds and the 2-kg car will have

How could you increase the number

of snowmen destroyed by the sled

sliding down the hill?

• D. All of the above.

A. Increase the starting

height of the sled.

B. Increase the mass

of the sled.

C. Increase the starting

kinetic energy of the

D. All of the above

How could you increase the number

of snowmen destroyed by the sled

sliding down the hill?

• D. All of the above.

A. Increase the starting

height of the sled.

B. Increase the mass

of the sled.

C. Increase the starting

kinetic energy of the

D. All of the above

A sled starts at rest with 51,450 J of potential

energy. After traveling part of the way down the

slope, the sled has 32,781 J of potential energy.

If there is no friction, what is the kinetic energy

of the sled?

A. 18,669 J

B. 32,781 J

C. 51,450 J

D. 84,231 J

A sled starts at rest with 51,450 J of potential

energy. After traveling part of the way down the

slope, the sled has 32,781 J of potential energy.

If there is no friction, what is the kinetic energy

of the sled?

A. 18,669 J

B. 32,781 J

C. 51,450 J

D. 84,231 J

What can you say about the

potential energy of the two

sleds shown below?

A. Sled A has more

potential energy.

B. Sled B has more

potential energy.

C. The two sleds have

the same potential

energy.

D. There is not enough

information to know

which sled has more

potential energy.

What can you say about the

potential energy of the two

sleds shown below?

A. Sled A has more

potential energy.

B. Sled B has more

potential energy.

C. The two sleds have

the same potential

energy.

D. There is not enough

information to know

which sled has more

potential energy.

What type of wave is shown below?

A. Transverse wave

B. Longitudinal wave

C. Combined wave

D. Sound wave

What type of wave is shown below?

A. Transverse wave

B. Longitudinal wave

C. Combined wave

D. Sound wave

What is the amplitude and wavelength of

the wave shown below?

A. Amplitude: 30 cm; wavelength: 60 cm

B. Amplitude: 30 cm; wavelength: 110 cm

C. Amplitude: 60 cm; wavelength: 60 cm

D. Amplitude: 60 cm; wavelength: 110 cm

What is the amplitude and wavelength of

the wave shown below?

What is the amplitude and wavelength of the wave

shown below?

What is the amplitude and wavelength of the wave

shown below?

What is the best estimate of the frequency of the wave

shown below?

A. 0.40 Hz

B. 0.85 Hz

C. 1.25 Hz

D. 2.50 Hz

What is the best estimate of the frequency of the wave

shown below?

A. 0.40 Hz

B. 0.85 Hz

C. 1.25 Hz

D. 2.50 Hz

How could you increase the power of a

wave in a spring?

A. Increase the amplitude.

B. Increase the frequency.

C. Increase the tension on the spring.

D. All of the above

How could you increase the power of a

wave in a spring?

A. Increase the amplitude.

B. Increase the frequency.

C. Increase the tension on the spring.

D. All of the above

A power drill runs at a voltage of 120 V

and draws a current of 4 A. What is the

wattage of the drill?

A. 4 W

B. 120 W

C. 124 W

D. 480 W

A power drill runs at a voltage of 120 V

and draws a current of 4 A. What is the

wattage of the drill?

A. 4 W

B. 120 W

C. 124 W

D. 480 W

If it takes 15 minutes to dry your hair

with a 1.200 kW hair drier, how much

energy is used in drying your hair?

A. 0.300 kWh

B. 1.200 kWh

C. 1.800 kWh

D. 18.000 kWh

If it takes 15 minutes to dry your hair

with a 1.200 kW hair drier, how much

energy is used in drying your hair?

A. 0.300 kWh

B. 1.200 kWh

C. 1.800 kWh

D. 18.000 kWh

In an area in which electricity costs 8

cents/kilowatt-hour, a 5 kW clothes dryer

runs for 90 minutes to dry a load of laundry.

How much did it cost to dry these clothes?

A. $0.20

B. $0.30

C. $0.45

D. $0.60

In an area in which electricity costs 8

cents/kilowatt-hour, a 5 kW clothes dryer

runs for 90 minutes to dry a load of laundry.

How much did it cost to dry these clothes?

A. $0.20

B. $0.30

C. $0.45

D. $0.60

A microwave can reheat 1 cup of coffee in 30 seconds.

It takes a coffee-maker 10 minutes to brew 12 cups of

coffee. If the coffee-maker requires 900 watts of power

and the microwave requires 1200 watts of power, does

it require more energy to brew 12 cups with the coffee-

maker or reheat 12 cups of coffee in a microwave?

A. The coffee-maker requires more energy.

B. The microwave requires more energy.

C. They require the same amount of energy.

D. The answer cannot be determined without more

information.

A microwave can reheat 1 cup of coffee in 30 seconds.

It takes a coffee-maker 10 minutes to brew 12 cups of

coffee. If the coffee-maker requires 900 watts of power

and the microwave requires 1200 watts of power, does

it require more energy to brew 12 cups with the coffee-

maker or reheat 12 cups of coffee in a microwave?

A. The coffee-maker requires more energy.

B. The microwave requires more energy.

C. They require the same amount of energy.

D. The answer cannot be determined without more

information.

In the series circuit shown below, what would

happen if one of the light bulbs and its

attached wire segment were removed?

A. The remaining lights would go out.

B. The remaining lights would shine with the

same brightness.

C. The remaining lights would shine less

brightly.

D. The remaining lights would get brighter.

In the series circuit shown below, what would

happen if one of the light bulbs and its

attached wire segment were removed?

B. The remaining lights would shine with the

same brightness.

C. The remaining lights would shine less

brightly.

In the parallel circuit shown below, what would

happen if one of the light bulbs and its attached wire

segment were removed?

B. The remaining lights would shine with the same

brightness.

C. The remaining lights would shine less brightly.

In the parallel circuit shown below, what would

happen if one of the light bulbs and its attached wire

segment were removed?

B. The remaining lights would shine with the same

brightness.

C. The remaining lights would shine less brightly.

In the circuit shown below, the battery

voltage is 20 volts. What will be the

reading of the ammeter shown in the

circuit?

Two-resistor series circuit

A. 1.50 amperes

B. 0.50 amperes

C. 0.40 amperes

D. 0.20 amperes

In the circuit shown below, the battery

voltage is 20 volts. What will be the

reading of the ammeter shown in the

circuit?

Two-resistor series circuit

A. 1.50 amperes

B. 0.50 amperes

C. 0.40 amperes

D. 0.20 amperes

If all four switches below are turned on,

which light bulb will light up? (W is wood,

S is silver, and Y is yarn.)

A. Circuit A

B. Circuit B

C. Circuit C

D. Circuit D

If all four switches below are turned on,

which light bulb will light up? (W is wood,

S is silver, and Y is yarn.)

A. Circuit A

B. Circuit B

C. Circuit C

D. Circuit D

What will happen when a light bulb is

removed from the circuit below, leaving a

gap?A. The remaining light bulbs will go

B. The remaining light bulbs will

C. The brightness of the remaining

light bulbs will not change.

D. The remaining light bulbs will

brighten.

What will happen when a light bulb is

removed from the circuit below, leaving a

gap?A. The remaining light bulbs will go

brighten.

What will happen when a light

bulb is removed from the

circuit below?

A. The remaining light bulbs will go

brighten.

What will happen when a light

bulb is removed from the

circuit below?

A. The remaining light bulbs will go

brighten.

What is the role of a fuse?

A. A fuse is used to turn lights on and off.

B. A fuse is used to break a circuit when

there is too much current.

C. A fuse is used to increase the current in a

circuit.

D. A fuse is used to create a short circuit.

What is the role of a fuse?

A. A fuse is used to turn lights on and off.

B. A fuse is used to break a circuit when

there is too much current.

C. A fuse is used to increase the current in a

circuit.

D. A fuse is used to create a short circuit.

Which of these objects

converts light to chemical

energy?

A. ethanol plant

B. light bulb

C. corn

D. solar cell

Which of these objects

converts light to chemical

energy?

A. ethanol plant

B. light bulb

C. corn

D. solar cell

Which energy path shows one way energy can get to

a light bulb?

A. sun water dam light bulb

B. sun air wind turbine light bulb

C. sun corn ethanol plant light bulb

D. all of the above

Which energy path shows one way energy can get to

a light bulb?

A. sun water dam light bulb

B. sun air wind turbine light bulb

C. sun corn ethanol plant light bulb

D. all of the above

What source of energy causes

winds to blow around the

Earth?

A. wind turbines

B. the Sun

C. the ocean

D. a chicken

What source of energy causes

winds to blow around the

Earth?

A. wind turbines

B. the Sun

C. the ocean

D. a chicken

What is electrical energy converted

to inside a toaster?

A. thermal energy and light

B. nuclear energy

C. chemical energy

D. kinetic energy

What is electrical energy converted

to inside a toaster?

A. thermal energy and light

B. nuclear energy

C. chemical energy

D. kinetic energy

What do wind turbines, hydroelectric dams, and ethanol

plants have in common?

A. All produce electrical current without pollution.

B. All use generators to produce electrical current.

C. All convert gravitational potential energy to electrical

current.

D. All convert thermal energy to electrical current.

What do wind turbines, hydroelectric dams, and ethanol

plants have in common?

A. All produce electrical current without pollution.

B. All use generators to produce electrical current.

C. All convert gravitational potential energy to electrical

current.

D. All convert thermal energy to electrical current.

A 2-kg block rests on a wall that is 3 m tall. What

is the gravitational potential energy of the

block? The force of gravity on Earth (g) is equal

to 9.8 m/s2.

A. 3 joules

B. 6 joules

C. 29.4 joules

D. 58.8 joules

A 2-kg block rests on a wall that is 3 m tall. What

is the gravitational potential energy of the

block? The force of gravity on Earth (g) is equal

to 9.8 m/s2.

A. 3 joules

B. 6 joules

C. 29.4 joules

D. 58.8 joules

When all frequencies of light are

absorbed, what color results?

A. black

B. white

C. cyan

D. red

When all frequencies of light are

absorbed, what color results?

A. black

B. white

C. cyan

D. red

A string of holiday lights is connected to an outlet in a

series circuit. When the lights are plugged in, the circuit

is overloaded, causing a fuse to blow. Which of the

following is most likely to solve the problem and allow

the lights to remain lit?

A. Add more lights to the series circuit.

B. Replace several lights on the string with wires.

C. Increase the voltage of the battery.

D. Connect the lights in a parallel circuit.

A string of holiday lights is connected to an outlet in a

series circuit. When the lights are plugged in, the circuit

is overloaded, causing a fuse to blow. Which of the

following is most likely to solve the problem and allow

the lights to remain lit?

A. Add more lights to the series circuit.

B. Replace several lights on the string with wires.

C. Increase the voltage of the battery.

D. Connect the lights in a parallel circuit.

Which wave phenomenon is

illustrated by this image?

A. Refraction

B. Diffraction

C. Diffusion

D. Interference

Which wave phenomenon is

illustrated by this image?

A. Refraction

B. Diffraction

C. Diffusion

D. Interference

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