Final

The marble has lost the same number of electrons acquired by the piece of silk. The marble acquires a positive charge and attracts the piece of sil

A glass marble is rubbed against a piece of silk. As a result the piece of fabric acquires extra electrons. What happens to the glass marble?

D

A ruler is in equilibrium on the tip of your finger only if __________. A. the net force is zero B. the net torque is zero C. nobody touches the ruler D. net torque and net force are zero

A

A stone of volume V submerged in water displaces the _________. A. same volume of water B. same volume and weight of water C. same density times volume D. same weight of water

The cooling ocean warms the air.

According to the law of conservation of energy, if ocean water cools, something else should warm. What is it that warms? The cooling ocean warms the surrounding ocean. The cooling ocean warms the vacuum of space. The cooling ocean warms the air. The cooling ocean warms the clouds.

air speed increases there

Air pressure over the surface of a bird's wings decreases when __________. turning motion is executed the wing is tilted downward air speed increases there air speed decreases there

5 columbs per second

An electric current of 5 amperes in a wire carries _________. 5 volts per coulomb 5 joules per ohm 5 coulombs per joule 5 coulombs per second

Electrons move at 0.01 cm/s. The electric field propagates at nearly the speed of light.

At what speed do electrons in a battery driven automotive circuit travel along a wire? At what speed does the electric field propagate along a wire? Electrons move at the speed of light. The electric field moves at 0.01 cm/s. Electrons travel at a few million km/hr. The electric field propagates at the speed of light. Electrons travel at 0.01 cm/s. The electric field travels instantaneously. Electrons move at 0.01 cm/s. The electric field propagates at nearly the speed of light.

Weight of air

Atmospheric pressure is mainly due to the ___________. weight of air air pressure against Earth's surface motion of air molecules average temperature of air

A Calorie is 1000 calories. A joule is 4.19 calories.

Distinguish between a calorie and a Calorie. Between a calorie and a joule. A calorie is 1000 Calories. A calorie is 4.19 joules. A Calorie is 1000 calories. A joule is 4.19 calories. A calorie is 1000 Calories. A joule is 4.19 calories. A Calorie is a unit of temperature, whereas a calorie is a unit of energy. A calorie is 4.19 joules.A Calorie is 1000 calories. A calorie is 4.19 joules.A Calorie is measured by burning food, whereas a calorie is measured by digesting food. A joule is 4.19 calories.

Constructive interference occurs when the crests of two waves add together. Destructive interference occurs when a crest of one wave is reduced by the trough of another.

Distinguish between constructive interference and destructive interference. Constructive interference occurs when the crests of two waves add together. Destructive interference occurs when a crest of one wave is reduced by the trough of another. Constructive interference occurs when the crests of two waves multiply together. Destructive interference occurs when the crest of one wave is divided by the trough of another. Constructive interference occurs when the crests of two waves add together. Destructive interference occurs when the troughs of two waves add together. Constructive interference occurs when the crest of one wave adds to the trough of another. Destructive interference occurs when a crest of one wave is cancelled by the crest of another.

Mass number is the number of nucleons; atomic mass is the total mass of an atom

Distinguish between mass number and atomic mass.

C

Distinguish between these different aspects of a wave: period, amplitude, wavelength, and frequency. A. Period is the distance from one crest to the next, amplitude is the distance from the midpoint to a crest, wavelength is the time from one crest to the next, and frequency is the number of crests that pass per second. B. Period is the number of crests that pass per second, amplitude is the distance from the midpoint to a crest, wavelength is the distance from one crest to the next, and frequency is the time from one crest to the next. C. Period is the time from one crest to the next, amplitude is the distance from the midpoint to a crest, wavelength is the distance from one crest to the next, and frequency is the number of crests that pass per second. D. Period is the time from one crest to the next, amplitude is the distance from one crest to the next, wavelength is the distance from the midpoint to a crest, and frequency is the number of crests that pass per second.

both

Does Hooke's law apply to spring compressions, or only stretches?

The battery is dc; the generator is ac.

Does a battery produce dc or ac? Does the generator at a commercial power station produce dc or ac? The battery is dc; the generator is ac. The battery is ac; the generator is dc. Both are ac. Both are dc.

A low specific heat capacity

Does a substance that heats up quickly have a high or a low specific heat capacity? A high specific heat capacity Larger objects heat up more quickly, independent of specific heat capacity Specific heat capacity does not matter. A low specific heat capacity

It increases resistance because atoms at higher temperatures jostle into the way of moving electrons.

Does heating a metal wire increase or decrease its electrical resistance? Why? It increases resistance because atoms at higher temperatures jostle into the way of moving electrons. It decreases resistance because a metal becomes a superconductor when warmed. It decreases resistance because atoms at higher temperatures jostle into the way of moving electrons. It decreases resistance because higher temperatures free more electrons to carry current.

Volume

Does the buoyant force on a submerged object depend on the volume of the object or the weight of the object? Weight Neither volume nor weight Both volume and weight Volume

B

How do linear momentum and angular momentum differ? A. Angular momentum depends on the distribution of mass times the total mass, whereas linear momentum depends only on the distribution of mass. B. Angular momentum depends on the distribution of mass, whereas linear momentum depends on the total mass. C. Angular momentum depends on tangential velocity, whereas linear momentum depends on the rotational velocity. D. Angular momentum depends on the total mass, whereas linear momentum depends on the distribution of mass.

C

How does a helicopter get its lifting force? A. The helicopter exerts a downward force on Earth; the reaction force of Earth on the helicopter is called lift. B. The helicopter exerts downward forces on the air that are slightly greater than the force of gravity, so it can hover. C. The helicopter exerts downward forces on air; the reaction forces of the air on the helicopter are upward and called lift. D. The helicopter exerts upward forces on the air; the reaction forces of the air on the helicopter are downward and called lift.

The decibel is a unit of measurement of sound intensity. Perceived loudness depends on sound intensity and sound frequency

How does loudness relate to the unit decibel? The decibel is a unit of measurement of sound frequency. Perceived loudness depends on sound intensity and sound frequency. The decibel is a unit of measurement of sound frequency. Perceived loudness is determined by sound frequency and sound wavelength. The decibel is a unit of measurement of sound intensity. Perceived loudness depends on sound intensity and sound frequency. The decibel is a unit of measurement of sound intensity. Perceived loudness is determined completely by sound intensity.

It has a different number of neutrons.

How does one isotope differ from another? It has a different number of protons. It has a different number of electrons. It has a different number of neutrons. It has a different electric charge.

A

How does pressure at the bottom of a body of water relate to the weight of water above each square meter of the bottom surface? The pressure is the weight of the water divided by 1 m2. The pressure is the weight times the depth. The pressure is the weight density divided by 1 m2. The pressure is the weight times the depth divided by 1 m2.

Sound intensity increases with an increasing sound wave amplitude.

How does the intensity of sound relate to amplitude? Sound intensity increases with an increasing sound wave amplitude. Sound intensity decreases with an increasing sound wave amplitude. Sound intensity does not depend directly on the amplitude, but perceived loudness does. Sound intensity does not depend directly on the amplitude, it is determined by the frequency of sound.

It decreases

How does the lever arm change when you decrease the distance to the nut? It stays the same. It decreases. .It increases.

The resistance of the thin piece is greater than that of the thick piece.

How does the resistance of a thick piece of copper wire compare to the resistance of a thin piece of copper wire? The resistance of the thick piece is greater than that of the thin piece. The resistance of the thin piece is greater than that of the thick piece. Both the wire and narrow piece of copper provide the same resistance.

They are equal

How does the weight of mercury in a barometer compare with the weight of an equal cross-section of air from sea level to the top of the atmosphere? They are equal. The answer depends on the cross-sectional area. The weight of the air is much greater. The weight of the mercury is much greater.

The direction of the field is the direction of the force on a positive test charge.

How is the direction of an electric field defined? The direction of the field is the direction of the force on an electron. A field is not a vector, so it does not have a direction. The direction of the field is the direction of the force on a positive test charge. The direction of the field is the direction of the force on a neutron.

6 joules

How much energy is given to each coulomb of charge that flows through a 6-VV battery? 6 watts 0.167 watts 0.167 joules 6 joules

A

Identify the force that propels a rocket. A. The rocket is propelled by the reaction force from the particles accelerated out the rear by an action force from the rocket. B. The rocket is propelled because the action force of the rocket on the exhaust gases is greater than the reaction force of the exhaust gasses on the rocket. C. The rocket is propelled by the reaction force of the exhaust gasses bouncing off the air molecules outside the rocket. D. The rocket is propelled because the action force of the rocket on the exhaust gases is less than than the reaction force of the exhaust gasses on the rocket.

It would increase.

If Earth shrank with no change in its mass, what would happen to your weight at the surface? It would increase. It would decrease at first and then increase .It would stay the same. It would decrease.

1 and 2

If a constant net force is applied to an object, which of the following statements is/are true? Select all that apply. The object has a constant acceleration. The velocity of the object changes linearly .The object has a constant velocity. The object moves in a straight line.

4 volts. The sum of the voltages across each lamp must add up to the total voltage across both lamps.

If a voltage of 6 VV is impressed across the circuit of two lamps in series and the voltage across the first lamp is 2 VV, what is the voltage across the second lamp? 2 volts. The voltages across two lamps in series must be the same. 4 volts. The sum of the voltages across each lamp must add up to the total voltage across both lamps. 8 volts. Voltages in series add together. -8 volts. The voltages must sum to zero around a circuit.

The pressure of the gas would increase by 10 percent.

If the volume of a confined gas is reduced 10 percent, how would the pressure of the gas change? The pressure of the gas would increase by 10 percent. The pressure of the gas would remain the same. The pressure of the gas would double. The pressure of the gas is also reduced by 10 percen

Only frequency changes

In the Doppler effect, does frequency change? Does wave speed change? Neither speed nor frequency change .Only speed changes. Only frequency changes. Both speed and frequency change.

As electromagnetic waves

In what form does radiant energy travel? As sound waves As electromagnetic waves As waves in the luminiferous aether As radioactive particles

The tub of the machine exerts centripetal inward force on clothes.

Is it an inward force or an outward force that is exerted on the clothes during the spin cycle of a washing machine?

B

On what factors does the buoyant force acting on an object depend? A. depth under water B. height of the object C. both height of the object and depth under water

Interference

Standing waves are produced by _________. interference frequency changes diffraction amplitude changes

C

Suppose you increase the depth of the object WITHOUT changing its height. What will happen to the force due to pressure on the bottom of the object? A. The force due to pressure on the bottom of the object will stay the same B. The force due to pressure on the bottom of the object will decrease. C. The force due to pressure on the bottom of the object will increase.

B

Suppose you increase the depth of the object WITHOUT changing its height. What will happen to the net buoyant force? A. The net buoyant force will decrease. B. The net buoyant force will stay the same. C. The net buoyant force will increase.

C

Suppose you increase the height of the object WITHOUT changing its depth under water. What will happen to the net buoyant force? A. The net buoyant force will decrease. B. The net buoyant force stays the same. C. The net buoyant force will increase.

equal to objects weight

The buoyant force on a floating object is __________. equal to the object's volume more than the buoyant force than if submerged less than the object's weight equal to the object's weight

B

The rotational speed of every point of a rotating rigid object _______. A. depends on the distance to the axis of rotation B. Is the same C. Is tangent to the circular motion D. is zero

along and parallel to the wave

The vibrations along a longitudinal wave move in a direction _________. along and parallel to the wave perpendicular to the wave neither along nor perpendicular to the wave both along and perpendicular to the wave

The wavelength is the distance between successive maximum compressions (or rarefractions).

The wavelength of a transverse wave is the distance between successive crests (or troughs). What is the wavelength of a longitudinal wave? The wavelength is the distance between successive maximum compressions (or rarefractions). The wavelength is a quarter of the maximum displacement from equilibrium. The wavelength is the maximum displacement from equilibrium. The wavelength is the distance between a compression and rarefraction.

It is determined by the temperature of the object relative to its surroundings. Hotter objects are net emitters

What determines whether an object is a net absorber or a net emitter of radiant energy at a given time? A. It is determined by the temperature of the object relative to its surroundings. B. Hotter objects are net absorbers.Hot objects are net emitters regardless of the temperature of the surroundings. C. Absorption and emission are the same for an object, so it is neither a net absorber nor a net emitter. D. It is determined by the temperature of the object relative to its surroundings. Hotter objects are net emitters

It depends on temperature and humidity, not on loudness and frequency.

What factors does the speed of sound depend upon? What are some factors that it does not depend upon? It depends on loudness and frequency, not on temperature and humidity. It depends on frequency and temperature, not on loudness and humidity. It depends on temperature and humidity, not on loudness and frequency. It depends on density and pressure, not on temperature and frequency.

C

What happens to the force of attraction between two planets when the distance between them is doubled? A. The force remains the same. B. The force decreases to half. C. The force decreases to one quarter. D. The force doubles.

A

What is Hooke's law? Does it apply to elastic materials or to inelastic materials? Stretch is proportional to force for elastic materials .Stretch is inversely proportional to force for elastic materials. Stretch is proportional to force for elastic and inelastic materials. Stretch is proportional to force for inelastic materials.

A molecule is composed of two or more atoms bonded together: H2O.

What is a molecule

In a standing wave, a node always has zero displacement and an antinode always has maximum displacement.

What is a node? What is an antinode? In a standing wave, a node always has zero displacement and an antinode always has maximum displacement. In a travelling wave, a node has zero displacement and an antinode is a crest or a trough. In a travelling wave, the node is the line of zero displacement and the antinode is the line of maximum displacement .In a standing wave, a node always has maximum displacement and an antinode always has zero displacement.

The net flow of electrons along a wire.

What is meant by drift velocity? The net flow of electrons along a wire. The random motions of electrons moving a few million km/hr. The collision velocity between electrons in the wire The velocity of the electric field in a wire.

It alternates back and forth 60 times a second

What is meant by saying that a certain current is 60 HzHz? It alternates back and forth 120 times a second. It alternates back and forth 60 times a second. It alternates back and forth 60 times a minute. It alternates back and forth 60 times an hour.

External torque

What is required to change the angular momentum of a system? External torque Torque External force Force

B

What is the buoyant force that acts on a submerged object equal to? A. The buoyant force is equal to the weight of the object submerged. B. The buoyant force is equal to the weight of the fluid displaced by the submerged object. C. The buoyant force is equal to both the weight of the fluid displaced and the weight of the object.

A

What is the focal length of a lens? What is the focal point? A. The distance between the center of the lens and either focal point is the focal length. The focal point is the point where a beam of parallel light, parallel to the principal axis, converges or appears to converge. B. The distance between the two focal points is the focal length. The focal point is the point where all images are in focus.The distance between the two focal points is the focal length. C. The focal point is the point where a beam of parallel light, parallel to the principal axis, converges or appears to converge. D. The distance between the center of the lens and either focal point is the focal length. The focal point is the point where all images are in focus.

Neutral

What is the most common net charge of an atom? Neutral Positive Dipole Negative

1.41

What is the ratio of escape speed from Earth to circular orbital speed? Ignore air resistance. 0.7 They are the same 2.0 1.41

Pitch is the human perception of sound frequency

What is the relationship between frequency and pitch? Frequency and pitch are identical. Pitch is the human perception of sound frequency .Frequency is the human perception of sound pitch. Pitch is proportional to the square of the sound frequency.

Ohm

What is the unit of electrical resistance? Amp Ohm Volt Amp per volt

C

What kind of collision, elastic or inelastic, occurs when a large fish swallows a small fish at rest? A. Inelastic, because the momentum is not conserved. B. Elastic, because the momentum is conserved C. Inelastic. The fishes stuck together after the collision. D. Elastic. The fishes stuck together after the collision.

C

What kind of motion does a torque tend to impart to an object? Torque tends to increase the linear speed of the object .Torque tends to decrease the rotational inertia of the object. Torque tends to twist or change the state of rotation of the object. Torque tends to increase the rotational inertia of the object.

distance and time

What two units of measurement describe speed?

Electric

What type of force holds atoms together in a crystal? Magnetic Electric Gravitational Electromagnetic

A

What would the magnitude of the gravitational field be anywhere inside a hollow, spherical planet? A. Zero N/kg B. The same as the surface value C. A quarter of the surface value D. Half the surface value

decreases while rising, but it increases while falling.

When a ball is thrown upward at an angle, what happens to the vertical component of its velocity as it rises? As it falls? Suppose that air resistance can be neglected. It increases while rising and while falling. Rising or falling, it does not change. It decreases while rising, but it increases while falling.It increases while rising, but it decreases while falling.

triples

When a party balloon is compressed to one-third its volume, gas pressure in the balloon ___________. remains the same if temperature does not change is also one-third triples

Convection

When a pot of water is being heated in a cookstove, what process takes the heat from the bottom of the pot to the surface of the water? Radiation Convection Conduction Heat

B

When an object is thrown upward, how much speed does it lose each second (ignoring air resistance)? A. It loses 10 m/s each second. B. It loses 10 m/s of speed each second until it reaches the high point, then it gains 10 m/s each second. C. It loses 1 m/s of speed each second.

Less than

When the bug that is creating waves swims forward, how does the frequency of the wave some distance away behind the bug compare with the frequency produced by a stationary bug? The frequency of the wave some distance away behind the bug is equal to the frequency of the wave produced by a stationary bug. The frequency of the wave some distance away behind the bug is less than the frequency of the wave produced by a stationary bug. The frequency of the wave some distance away behind the bug is greater than the frequency of the wave produced by a stationary bug.

greater than

When the bug that is creating waves swims forward, how does the frequency of the wave some distance away in front of the bug compare with the frequency of the wave produced by a stationary bug? The frequency of the wave some distance away in front of the bug is equal to the frequency produced by a stationary bug. The frequency of the wave some distance away in front of the bug is less than the frequency produced by a stationary bug. The frequency of the wave some distance away in front of the bug is greater than the frequency produced by a stationary bug.

The speed of the wave some distance away is equal to the speed of the wave due to a stationary bug.

When the bug that is creating waves swims in the direction of the waves, how does the speed of the wave some distance away in front of the bug compare with the speed of the wave created by a stationary bug? The speed of the wave some distance away is greater than the speed of the wave due to a stationary bug. The speed of the wave some distance away is equal to the speed of the wave due to a stationary bug. The speed of the wave some distance away is less than the speed of the wave created by a stationary bug.

Contraction

When the temperature of ice-cold water is increased slightly, does it undergo a net expansion or a net contraction? Neither contraction nor expansion Expansion A combination of expansion (due to increased molecular motion) and contraction (due to crystal collapse) leads to a net expansion. Contraction

Energy

When you make your monthly household electric payment, which of the following are you billed for: voltage, current, power, energy? Voltage Current Power Energy

electrons already in your body

When your body undergoes electric shock, the source of moving electrons is _________. moisture between you and a voltage source mainly from the ground the object making electrical contact electrons already in your body

Liquids generally expand more than solids

Which generally expands more for an equal increase in temperature: solids or liquids? Solids and liquids generally expand the same. Liquids generally expand more than solids Solids generally expand more than liquids. Solids and liquids generally do not expand when heated.

Electrons are free to move through the metal, whereas protons are fixed in place.

Why are electrons, rather than protons, the principal charge carriers in metal wires? Electrons are free to move through the metal, whereas protons are fixed in place. Electrons are in the nucleus, whereas protons are in a cloud around the nucleus. Protons are free to move through the metal, whereas electrons are fixed in place. Electrons are lighter, so they move faster than protons with the same kinetic energy.

Electrons are tightly bound to their atoms, making them poor conductors of heat

Why are materials such as glass and rubber good insulators? Electrons are loosely bound to their atoms, making them poor conductors of heat. Electrons are loosely bound to their atoms, making them good conductors of heat. Electrons are tightly bound to their atoms, making them poor conductors of heat. Electrons are tightly bound to their atoms, making them good conductors of heat.

The outer shell electrons in metals are free to move from atom to atom.

Why are metals good conductors of both heat and electricity? The outer shell electrons in metals are tightly bound, making it easy for vibrations to move from one atom to the next. The outer shell electrons in metals move with zero resistance, making all metals superconductors. The outer shell electrons in atoms vibrate in place and emit electromagnetic radiation that travels throughout the metal. The outer shell electrons in metals are free to move from atom to atom.

because of Archimedes' principle

Why does the air exert a buoyant force on all objects in air, not only light objects such as balloons? because of Boyle's law because of its low density because of Bernoulli's principle because of Archimedes' principle

The force is at a right angle

Why doesn't the force of gravity change the speed of a satellite in circular orbit? Satellites orbit at a height where gravity is essentially zero. The inertia of the fast satellite is so great that gravity can be ignored. Air resistance counteracts the effects of gravity .The force is at a right angle to the velocity

A

Why is kinetic energy a constant for a satellite in a circular orbit but not for a satellite in an elliptical orbit? A. The force of gravity is perpendicular to the motion in a circular orbit but not in an elliptical orbit. B. The force of gravity is perpendicular to the motion in an elliptical orbit but not in a circular orbit C. Kinetic energy is constant for both orbits. D. Kinetic energy is not constant for a satellite in a circular orbit but it is for a satellite in an elliptical orbit.

the spoon tends to retain it's shape

Why will a dropped metal spoon vibrate when hitting a floor, whereas a dropped napkin won't? The spoon tends to retain its shape, while the napkin does not. The napkin has a rectangular shape, while the spoon is similar to an elongated rod. Vibration occurs only in elongated objects.As the natural frequency of the napkin is very high, the napkin requires a very strong impact to start vibrating. The napkin is lighter than the spoon, so the impact on the dropped napkin is not enough to cause vibrations.

amplitude

the ______________ of a periodic motion, such as the up and down motion of the weight on the spring, is the maximum distance the object moves from its equilibrium or rest position.

frequency

the number of complete cycles or oscillations of a periodic motion that occur in one second. In this case, the weight suspended from the spring completes four oscillations (or bobs up and down four times) every second.

Period

the time it takes for one complete cycle or oscillation to occur