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WorksheetsSemester B Practice
Total questions: 66
Worksheet time: 48mins
Why does the moon lack an atmosphere
Are both circuits in the figure series circuits? Explain your answer.
Describe how the intensity of light changes with distance from a light source.
Explain the difference between reflection and refraction.
What is the difference between mass and weight?
If the plotted points on a speed-time graph do not form a straight line, what do you know about the object’s acceleration?
Look at the figure. Describe the motion of the object in Graph A.
The apparent change in position of an object with respect to a distant background is called (a) .
The force of gravity that the sun exerts on a planet is directed (a) .
Two or more simple machines working together make up a(n) (a) machine.
For work to be done on the object, the object has to (a) .
The centripetal force acting on the moon continuously changes the (a) of the moon’s motion
The gas giants are made mostly of
helium only
methane ice crystals
carbon dioxide
hydrogen and helium
In the geocentric model,
Earth travels around the sun.
the planets travel around the Earth.
the planets travel around the sun.
the planets travel around the stars.
Where is the field of a magnet strongest?
near the North Pole
near the South Pole
near both poles
near the middle
A(n) __________ is analogous to a one-way valve.
digital signal
diode
transistor
analog signal
What is the electrical power when the current is 25 amps and the voltage is 10 volts?
25 watts
250 watts
2.5 watts
2,500 watts
A strong electric field is
directed toward a charge
directed away from a charge
caused by a large quantity of charge
caused by a small quantity of charge
the electromagnetic waves with the highest frequency are
infrared rays
gamma rays
ultraviolet waves
radio waves
The highest frequency sound human ears can usually hear is about
20 Hz.
10,000 Hz
20,000 Hz
30,000 Hz
In a transverse wave, the medium vibrates
at right angels to the wave direction
in the same direction as the wave
at a 45-degree angle to the wave direction
which of the following materials conducts heat well?
glass
plastic
metal
wood
which of the following statements is a consequence of the equation E=mc2?
Energy is released when matter is destroyed
Mass and energy are equivelent
The law of conservation of energy must be modified to state that mass and energy are conserved in any process.
all of the above
Most renewable energy originates from
fossil fuels
the ground
the sun
uranium
Work is a transfer of
energy
force
mass
motion
A machine with a 5-N input force and a 25-N output force has a mechanical advantage of
2
20
5
125
The buoyant force acting on a submerged object is equal to
the object's mass
the objects volume
the mass of the fluid displaced by the object
the weight of the fluid displaced by the object
An astronaut travels far away from Earth, her weight
decrease because gravity decreases
decreases because her mass decreases
increases because gravity increases
remains the same because her mass remains the same
Momentum depends on
force only
velocity and friction
weight and mass
mass and velocity
The figure shows the motion of three balls. The curved paths followed by balls B & C are examples of
centripetal motion
constant motion
linear motion
projectile motion
When a pair of balanced forces acts on an object, the net force that results is
greater in size than both forces combined
greater in size than one of the forces
equal in size to one of the forces
equal to zero
The rate at which velocity is changing at a given instant is described by
instantaneous accleration
average speed
constant speed
vector addition
Displacement vectors of 3m and 5m in the same direction combine to make displacement vector that is
2m
0m
8m
15m
Average speed is the total distance divided by the
average distance
average acceleration
total time
slope
A train approaching a crossing changes speed from 25m/s to 10 m/s in 240s. How can the train's acceleration be described?
The train's acceleration is positive.
The train is not accelerating/
The train will come to rest in 6 minutes.
The train's acceleration is negative
A change is which of the following affects the weight of an object?
momentum
velocity
acceleration due to gravity
friction
Newton's first law of motion is sometimes called the law of
inertia
conservation
momentum
resistance
What force is responsible for the repulsion between two positively charged particles?
cnetripetal
electric
gravitational
nuclear
Where is fluid pressure greatest?
30 cm below the surface of a swimming pool
1m below the surface of a swimming pool
2m below the surface of a swimming pool
The pressure is the same in all parts of the swimming pool
How much work in Nm is done when a 10.0N force moves an object 2.5m?
0.25Nm
2.5Nm
25Nm
4.0Nm
Which is not a simple machine?
wedge
screw
lever
fulcrum
An object's gravitational potential energy is NOT directly related to which of the following?
its height relative to a reference level
its mass
its speed
the acceleration due to gravity
Which of the following statements is true according to the law of conservation of energy?
Energy cannot be created
Energy cannot be destroyed
Energy can be converted from one form to another
all of the above
As the temperature of an object rises, do does the
kinetic energy of the object
mass of the object
thermal energy of the object
potential energy of the object
Which of the following is a FALSE statement about a heat pump?
It requires no work.
It moves heat from a cold area to a hot area.
It uses a refrigerant.
Air conditions are heat pumps.
For waves moving at a constant speed, if the wavelength is doubled, the frequency is
doubled
halved
unchanged
quadrupled
The particle model describes light as
a stream of photons
an interference pattern
a wave
an electric field
Which type of light bulb uses phosphors?
neon
incandescent
tungston-halogen
fluorescent
The current in a toaster is 20 amps, and its voltage is 200 volts. What is the resistance in the toaster?
1 ohm
10 ohms
4,000 ohms
4 ohm
Which of these cannot increase the strength of an electromagnet?
making loops larger in the coil
placing an iron bar in the coil
winding more loops in the coil
increasing the current in the coil
Electronic signals that pulse current in a series of 1s and 0s are known as
analog signals
digital signals
electromagnetic signals
semiconducting signals
A transformer increases or decreases
energy
resistance
voltage
direct current
Asteroids are most likely to be
remnants of the early solar system.
former moons of jupiter
the remains of shattered planets
captured comets
Where does the sun's visible light come from?
the photosphere
the corona
the chromosphere
the radiation zone
The downward force produced when air flows over the winglike spoiler on a race car is an example of (a) principle.
The rate at which work is done is called (a) .
Objects that scatter some of the light that is transmitted through them are (a) .
The difference in the composition of the terrestrial planets and the gas giants can be explained by the different condensation (a) in the regions near and far from the sun during the formation of the solar system.
A contracting cloud of dust and gas with enough mass to form a star is called a(n)
(a)
Compare Graphs A and B in the figure. At a time of 2 seconds, which graph shows a greater velocity? How do you know?
Using Newton’s second law of motion, if the force on an object is 20 N, and its mass is 5 g, what is its acceleration?
What is the equation for calculating a machine’s efficiency?
Explain why a fire engine’s siren sounds lower in pitch after the fire engine passes you.
How are the secondary colors of light related to the primary colors?
Explain how you can determine the direction of a magnetic field produced by a wire if you know the direction of the current through the wire.
How does a black hole form?
