The density of a submerged submarine is about the same as the density of

The density of a submerged submarine is about the same as the density of

A) a crab.
B) iron.
C) a floating submarine.
D) water.
E) none of these

Answer: D

Blood pressure is normally greater in your

Blood pressure is normally greater in your

A) ears.
B) feet.
C) same in each





Answer: B

A completely submerged object always displaces its own

A completely submerged object always displaces its own

A) volume of fluid.
B) weight of fluid.
C) density of fluid.
D) all of these








Answer: A

Pumice is a volcanic rock that floats. Its density is

Pumice is a volcanic rock that floats. Its density is 

A) less than the density of water.
B) equal to the density of water.
C) more than the density of water.







Answer: A

One liter of water has a mass of

One liter of water has a mass of

A) 1 kilogram.
B) 14.7 grams.
C) 500 grams.

Answer: A

Water pressure is greatest against the

Water pressure is greatest against the

A) top of a submerged object.
B) bottom of a submerged object.
C) sides of a submerged object.
D) is the same against all surfaces

Answer: B

If you make cupcakes and bake them as directed for a cake, you will find the cupcakes

If you make cupcakes and bake them as directed for a cake, you will find the cupcakes

A) overbaked.
B) underbaked.
C) properly baked.







Answer: A

Tripling the linear size of an object multiplies its area by

Tripling the linear size of an object multiplies its area by

A) 3 and its volume by 9.
B) 9 and its volume by 18.
C) 9 and its volume by 27.
D) 27 and its volume by 81.







Answer: C

Which potatoes when peeled produce the most peelings?

Which potatoes when peeled produce the most peelings?

A) 10 kg of large potatoes
B) 10 kg of small potatoes
C) They both produce the same amount.

Answer: B

A wooden block has a mass of 1000 kg and a volume of 2 cubic meters. What is the block's density?

A wooden block has a mass of 1000 kg and a volume of 2 cubic meters. What is the block's density?

A) 100 kg per cubic meter
B) 200 kg per cubic meter
C) 500 kg per cubic meter
D) 1000 kg per cubic meter







Answer: C

Stone slabs are stronger under

Stone slabs are stronger under

A) tension.
B) compression.
C) both tension and compression.

Answer: B

Compared to the volume of a kilogram of feathers, the volume of a kilogram of lead is

Compared to the volume of a kilogram of feathers, the volume of a kilogram of lead is

A) less.
B) more.
C) the same.






Answer: A

You wish to bolt a sign to a horizontal I-beam supporting a bridge. You will weaken the beam least if you drill the bolt-holes through the

You wish to bolt a sign to a horizontal I-beam supporting a bridge. You will weaken the beam least if you drill the bolt-holes through the

A) upper flange.
B) lower flange.
C) web.
D) All these will have the same effect.

Answer: C

Which has the greater density, a lake full of water or a cup full of lake water?

Which has the greater density, a lake full of water or a cup full of lake water?

A) the cup full of lake water
B) the lake full of lake water
C) Both have the same density.

Answer: C

Compared to the density of a kilogram of feathers, the density of a kilogram of lead is

Compared to the density of a kilogram of feathers, the density of a kilogram of lead is

A) less.
B) more.
C) the same.





Answer: B

When a chocolate bar is cut in half, its density is

When a chocolate bar is cut in half, its density is

A) halved.
B) unchanged.
C) doubled.





Answer: B

A factor that usually determines whether a substance is in the solid, liquid, gaseous, or plasma state is its

A factor that usually determines whether a substance is in the solid, liquid, gaseous, or plasma state is its

A) atomic shell configuration.
B) atomic number.
C) composition.
D) temperature.







Answer: D

The air in this room has

The air in this room has

A) mass.
B) weight.
C) energy.
D) all of these
E) none of these

Answer: D

A force that determines the chemical properties of an atom is a(n)

A force that determines the chemical properties of an atom is a(n)

A) friction force.
B) nuclear force.
C) gravitational force.
D) electrical force.







Answer: D

The lightest particle of those listed below is

The lightest particle of those listed below is

A) a proton.
B) a molecule.
C) an electron.
D) an atom.

Answer: C

In an electrically neutral atom, the number of protons in the nucleus is balanced by an equal number of

In an electrically neutral atom, the number of protons in the nucleus is balanced by an equal number of

A) neutrons.
B) quarks.
C) orbital electrons.







Answer: C

Which of these atoms has the most mass?

Which of these atoms has the most mass?

A) hydrogen
B) iron
C) lead
D) uranium








Answer: D

Atoms heavier than hydrogen were made by

Atoms heavier than hydrogen were made by

A) photosynthesis.
B) radiant energy conversion.
C) nuclear fusion.

Answer: C

What makes an element distinct?

What makes an element distinct?

A) the number of protons
B) the number of neutrons
C) the number of electrons
D) the total mass of all the particles
E) none of these






Answer: A

Which of the following are electrically neutral?

Which of the following are electrically neutral?

A) proton
B) neutron
C) electron
D) ion
E) none of these







Answer: B

How many different elements are in a water molecule?

How many different elements are in a water molecule?

A) one
B) two
C) three
D) four






Answer: B

Our Moon travels fastest as it orbits the Earth when it is

Our Moon travels fastest as it orbits the Earth when it is 

A) revolving
B) rotating
C) performing an eclipse
D) closest
E) All of the above choices are true







Answer: D

If the planet Jupiter underwent gravitational collapse, its rate of rotation about its axis would

If the planet Jupiter underwent gravitational collapse, its rate of rotation about its axis would

A) decrease.
B) increase.
C) stay the same.
D) more information needed

Answer: B

When a twirling ice skater brings her arms inward, her rotational speed

When a twirling ice skater brings her arms inward, her rotational speed

A) increases.
B) decreases.
C) remains the same.





Answer: A

A car travels in a circle with constant speed. The net force on the car is

A car travels in a circle with constant speed. The net force on the car is

A) directed forward, in the direction of travel.
B) directed toward the center of the curve.
C) zero because the car is not accelerating.
D) none of these

Answer: B

Two people are balanced on a seesaw. If one person leans toward the center of the seesaw, that person's end of the seesaw will

Two people are balanced on a seesaw. If one person leans toward the center of the seesaw, that person's end of the seesaw will

A) rise.
B) fall.
C) stay at the same level.
D) rise and then fall.
E) fall and then rise.







Answer: A

The center of mass of a human body is located at a point

The center of mass of a human body is located at a point

A) that is fixed, but different for different people.
B) that is always directly behind the belly button.
C) that changes as a person bends over.
D) none of these

Answer: C

Consider a string with several rocks tied along its length at equally spaced intervals. You whirl the string overhead so that the rocks follow circular paths. Compared to a rock in the middle of the string, a rock at the outer end moves

Consider a string with several rocks tied along its length at equally spaced intervals. You whirl the string overhead so that the rocks follow circular paths. Compared to a rock in the middle of the string, a rock at the outer end moves

A) half as fast.
B) twice as fast.
C) at the same linear speed.

Answer: B

If a record player's rotational speed is doubled, then the linear speed of a pet hamster sitting on the edge of the record will

If a record player's rotational speed is doubled, then the linear speed of a pet hamster sitting on the edge of the record will

A) double.
B) halve.
C) remain the same.







Answer: A

Two 5000-kg passenger cars roll without friction (one at 1 m/s, the other at 2 m/s) toward each other on a level track. They collide, couple, and roll away together with a combined momentum of

Two 5000-kg passenger cars roll without friction (one at 1 m/s, the other at 2 m/s) toward each other on a level track. They collide, couple, and roll away together with a combined momentum of

A) zero.
B) 5000 kg m/s.
C) 10,000 kg m/s.
D) 15,000 kg m/s.






Answer: B

Two pool balls, each moving at 2 m/s, roll toward each other and collide. Suppose after bouncing apart, each moves at 4 m/s. This collision violates conservation of

Two pool balls, each moving at 2 m/s, roll toward each other and collide. Suppose after bouncing apart, each moves at 4 m/s. This collision violates conservation of

A) momentum.
B) energy.
C) both momentum and energy.
D) none of the above choices

Answer: B

A feather and a coin dropped in a vacuum fall with equal

A feather and a coin dropped in a vacuum fall with equal

A) forces.
B) momenta.
C) accelerations.
D) kinetic energies.
E) none of these








Answer: C

If the speed of a moving object doubles, which of the following also doubles?

If the speed of a moving object doubles, which of the following also doubles?

A) momentum
B) kinetic energy
C) acceleration
D) all of the above







Answer: A

A torque acting on an object tends to produce

A torque acting on an object tends to produce

A) equilibrium.
B) rotation.
C) linear motion.
D) velocity.
E) a center of gravity.

Answer: B

When a rifle is fired, it recoils as the bullet is set in motion. The rifle and bullet ideally acquire equal

When a rifle is fired, it recoils as the bullet is set in motion. The rifle and bullet ideally acquire equal

A) but opposite amounts of momentum.
B) amounts of kinetic energy.
C) both of these
D) neither of these

Answer: A

A jack system will increase the potential energy of a heavy load by 1000 J with a work input of 2000 J. The efficiency of the jack system is

A jack system will increase the potential energy of a heavy load by 1000 J with a work input of 2000 J. The efficiency of the jack system is

A) 10%.
B) 20%.
C) 50%.
D) 80%.






Answer: C

A car moves 4 times as fast as another identical car. Compared to the slower car, the faster car has

A car moves 4 times as fast as another identical car. Compared to the slower car, the faster car has

A) 4 times the KE.
B) 8 times the KE.
C) 12 times the KE.
D) 16 times the KE.

Answer: D

Using 1000 J of work, a toy elevator is raised from the ground floor to the second floor in 20 seconds. The power needed to do this job was

Using 1000 J of work, a toy elevator is raised from the ground floor to the second floor in 20 seconds. The power needed to do this job was

A) 20 W.
B) 50 W.
C) 100 W.
D) 1000 W.
E) 20,000 W.







Answer: B

A 2-kg mass is held 4 m above the ground. What is the approximate potential energy of the mass with respect to the ground?

A 2-kg mass is held 4 m above the ground. What is the approximate potential energy of the mass with respect to the ground?

A) 6 J
B) 8 J
C) 32 J
D) 80 J








Answer: D

What task requires the most work; lifting a 50-kg sack 2 meters or lifting a 25-kg sack 4 meters?

What task requires the most work; lifting a 50-kg sack 2 meters or lifting a 25-kg sack 4 meters?

A) the 50-kg sack
B) the 25-kg sack
C) Both require the same amount of work.
D) impossible to determine without knowing the contents of the sack

Answer: C

A ball rolling down an incline has its maximum kinetic energy at

A ball rolling down an incline has its maximum kinetic energy at

A) the top.
B) halfway down.
C) three-quarters of the way down.
D) the bottom.

Answer: D

After rolling halfway down an incline, a marble's kinetic energy is

After rolling halfway down an incline, a marble's kinetic energy is

A) less than its potential energy.
B) greater than its potential energy.
C) the same as its potential energy.
D) impossible to determine.

Answer: C

When bullets are fired from an airplane in the forward direction, the momentum of the airplane will be

When bullets are fired from an airplane in the forward direction, the momentum of the airplane will be

A) decreased.
B) unchanged.
C) increased.

Answer: A

A pulley is capable of increasing energy.

A pulley is capable of increasing energy.

A) sometimes true
B) always false
C) always true
D) sometimes false

Answer: B

An object lifted 10 meters gains 200 J of potential energy. If the same object is lifted 20 meters, its potential energy gain is

An object lifted 10 meters gains 200 J of potential energy. If the same object is lifted 20 meters, its potential energy gain is

A) half as much.
B) the same.
C) twice as much.
D) four times as much.
E) more than four times as much.

Answer: C

Do 100 J of work in 50 s and your power output is

Do 100 J of work in 50 s and your power output is

A) 1/2 W
B) 2 W.
C) 4 W.
D) 50 W.
E) 5,000 W.

Answer: B