Transcript File

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
egg?
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
egg?
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
greater kinetic energy.
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
greater kinetic energy.
•.
• D. All of the above.
How could you increase the number
of snowmen destroyed by the sled
sliding down the hill?
A. Increase the starting
height of the sled.
B. Increase the mass
of the sled.
C. Increase the starting
kinetic energy of the
sled
D. All of the above
•.
• D. All of the above.
How could you increase the number
of snowmen destroyed by the sled
sliding down the hill?
A. Increase the starting
height of the sled.
B. Increase the mass
of the sled.
C. Increase the starting
kinetic energy of the
sled
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
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 can you say about the
potential energy of the two
sleds shown below?
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?
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?
A. Amplitude: 15 cm; wavelength: 150 cm
B. Amplitude: 30 cm; wavelength: 150 cm
C. Amplitude: 30 cm; wavelength: 200 cm
D. Amplitude: 150 cm; wavelength: 30 cm
What is the amplitude and wavelength of the wave
shown below?
A. Amplitude: 15 cm; wavelength: 150 cm
B. Amplitude: 30 cm; wavelength: 150 cm
C. Amplitude: 30 cm; wavelength: 200 cm
D. Amplitude: 150 cm; wavelength: 30 cm
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 coffeemaker 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 coffeemaker 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?
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 parallel 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 parallel 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 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
out.
B. The remaining light bulbs will
dim.
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
out.
B. The remaining light bulbs will
dim.
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?
A. The remaining light bulbs will go
out.
B. The remaining light bulbs will
dim.
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?
A. The remaining light bulbs will go
out.
B. The remaining light bulbs will
dim.
C. The brightness of the remaining
light bulbs will not change.
D. The remaining light bulbs will
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 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.
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