Physics Quizzes

A piano tuner knows that a key on the piano is tuned to the frequency of his tuning fork when he strikes them at the same time and the number of beats he hears each second is A. 3 B. 2 C. 0 D. 4 E. 1

0

A weight or mass on the end of a spring as shown below bobs up and down one complete cycle every two seconds. A weight suspended from a spring bobs up and down over a distance of 1 meter in 2 seconds. Its frequency is A. 0.5 hertz B. 1 hertz C. 2 hertz D. none

0.5 hertz

Which contains more atom: 1 kg of lead or 1 kg of aluminum? A. 1 kg lead B. 1 kg aluminum

1 kg aluminum

A boxer punches a sheet of paper in midair and brings it from rest up to a speed of 21 m/s in 0.044s. If the mass of the paper is 0.003 kg, what force does the boxer exert on it? And.... How much force does the paper exert on the boxer? A. 1.4 N and 1.4 N B. 1.4 N and 0 N C. 17 N and 2 N D. 17 N and 12 N E. 4 N and 4 N

1.4 N and 1.4 N

The force of friction on a sliding object is 10N. The applied force needed to maintain a constant velocity is A. 10 N B. less than 10 N C. More than 10 N

10 N

A stone is being accelerated vertically upward by a string attached to it. Now suppose the string breaks and the stone slows in its upward motion. What is the acceleration of the stone at the top of its path? A. 10 m/s squared B. 0 m/s squared C. it is impossible to determine from the information given

10 m/s squared

A wave having a frequency of 1000 hertz vibrates at A. less than 1000 cycles per second B. more than 1000 cycles per second C. 1000 cycles per second

1000 cycles per second

How many vibrations per second are associated with a 101-MHz radio wave? A. more than 101,000,000 B.101,000,000 C. less than 101,000,000

101,000,000

The force of friction on a sliding object is 10 N. The applied force needed to maintain a constant velocity is A. more than 10 N B. 10N C. less than 10N

10N

Calculate the resultant of the velocities 100 km/hr north and 100 km/hr west. A. 200 km/hr B. 140 km/hr C. 0 km/hr D. 100 km/hr E. 150 km/hr

140 km/hr

What is the molecular mass of a water molecule? A. 15 amu B. 12 amu C. 10 amu D. 18 amu E. None of these. It depends on the temperature

18 amu

Forces of 2.8 N and 5.0 N act at right angles on a block of mass 2.9 kg. Find the acceleration of the block. A. 5.7 m/s2 B. 2.7 m/s2 C. 0.76 m/s2 D. 0.96 m/s2 E. 2.0 m/s2

2.0 m/s2

A skipper on a boat notices wave crests passing his anchor chain every 4.0 seconds. He estimates the distance between wave crests to be 11 meters He also correctly estimates the speed of the waves. Find this speed. A. 2.2 m/s B. 11 m/s C.44 m/s D. 2.7 m/s E. 2.8 m/s

2.8 m/s

The approximate range of human hearing is A. 40 hertz to 40,000 hertz B. 10 hertz to 10,000 hertz C. 20 hertz to 20,000 hertz D. Actually all of these- depends on the hearing ability of the person

20 hertz to 20,000 hertz

The second floor of a house is 8 m above the street level. How much work is required to lift a 310 kg refrigerator to the second-story level? (use 10m/s2 for the acceleration due to gravity) A. 0 J B. 2500 J C. 25000 J D. 39 J E. 390 J

25000 J

A 250-kg bear grasping a vertical tree slides down at constant velocity. The friction force between the tree and the bear is what? (Use 10 m/s squared for the acceleration due to gravity) A. 25N B. 2500N C. 250N D. more than 2500N

2500N

A bat flying in a cave emits a sound and receives its echo 0.17 second later. Find its distance from the cave wall. A. 58 meters B. 29 meters C. 120 meters D.2000 meters E. 1000 meters

29 meters

A 2 kg mass has 40 J of potential energy with respect to the ground. Approximately how high is it above the ground? A. 2m B. 1m C. 4m D. 3m E. none of these

2m

Radio waves travel at the speed of light, 300,00 km/s. The wavelength of a radio wave received at 100 megahertz is A. 3.0 B. 0.003 C. 300 D. 30 E. none

3.0

Two tuning forks produce sounds of wavelengths 3.4 meters and 3.3 meters. Approximately what beat frequency is produced? A. 2.0 hertz B. 1.0 hertz C. 0.1 hertz D. 4.0 hertz E. 3.0 hertz

3.0 hertz

A 300-kg bear grasping a vertical tree slides down at constant velocity. The friction force between the tree and the bear is A. 30 N B. 300N C. 3000N D. more than 3000N

3000N

A karate chop delivers a blow of 3000 N to a board the breaks. The force that acts on the hand during this event is A. 1500N B. zero C. 3000N D.6000N

3000N

The sketch shows a painter's scaffold in mechanical equilibrium. The person in the middle weighs 500, and the tensions in each rope are 400. A. 800N B. 1300N C. 500N D. 300N

300N

A wave oscillates up and down two complete cycles each second. If the wave travels an average distance of 6 meters in one second, its wavelength is A. 0.5 m B. 2m C. 3m D. 6m E. 1m

3m

A piece of rope is pulled by two people in a tug-of-war. Each pulls with 400 N of force. What is the tension in the rope? A. 800N B. Zero C. 600 N D. 400 N E. None of these

400 N

A man weighing 800 N stands at rest on two bathroom scales so that his weight is distributed evenly over both scales. The reading on each scale is A. 400N B. 200N C. 800N D. none of these

400N

Two people, one twice as massive as the other, attempt a tug-of -war with 12 meters of massless rope on frictionless ice. After a brief time, they meet. The heavier person slides a distance of A. 3m B. 6m C. 4m D. 0m

4m

A different scaffold the weighs 400N supports two painters, one 500N and the other 400 N. The reading in the left scale is 800N. What is the reading in the right-hand scale? A. 800N B. 500N C. 400N D. 1300N E. 900N

500N

A 60 vibration per second wave travels 30 meters in 1 second. Its frequency is A. 1800 hertz and it travels at 2 m/s B. 60 hertz and it travels at 30 m/s C. 30 hertz and it travels at 60 m/s

60 hertz and it travels at 30 m/s

Henry Heavyweight weighs 1800N and stands on a pair of bathroom scales so that one scale reads twice as much as the other. A. 600N,1200N B.900N, 900N C.1800N, 1800N D. 600N, 600N E.1200N, 900N

600N,1200N

If raindrops fall verically at a speed of 2.0 m/s and you are running at 7.4 m/s, how fast do they hit you face? A. 9.4 m/s B. 59 m/s C. 5.4 m/s D. 7.7 m/s E. 7.1 m/s

7.7 m/s

Lucy Lightfoot stands with one foot on one bathroom scale and her other foot on a second bathroom scale. Each scale reads 380. What is Lucy's weight? A. 380N B. 760N C. 190N D. 253N

760N

How many atoms are in a molecule of ethanol, C2H6O? A. 3 B. 6 C. 8 D. 9 E. None of the above

9

A stone is being accelerated vertically upward by a string attached to it. Now suppose the string breaks and the stone ... in its upward motion. What is the acceleration of the stone at the top of its path? A. 9.8 m/s2 B. 0 m/s2 C. It is impossible to determine given the information in the problem

9.8 m/s2

A feather and a coin dropped in a vacuum fall with equal A. Acceleration B. Momentum C.Forces D. Kinetic eneergies E.None of these

Acceleration

Your friend says that the heavyweight champion of the world cannot exert a force of 50 N on a piece of tissue paper with his best punch. The tissue paper is held in midair- no wall, no tricks. You A. Disagree, for a good punch easily deliver this much force. B. Agree that it can't be done. C. Have reservations about this assertion.

Agree that it can't be done.

Wave interference occurs for A. sound waves B. light waves C. water waves D. all E. none

All

An object in mechanical equilibrium is an object A. Moving with constant B. Having no acceleration C. At rest D. All of these

All of these

A hydraulic press, like an inclined plane, is capable of increasing energy A. Always true B. Always false C. Sometimes true D. Sometimes false

Always false

Which has greater kinetic energy, a car traveling at 30 km/he or a car of half the mass traveling at 60 km/hr A. The 60 km/hr car B. The 30 km/hr car C. Both have the same kinetic energy D. More information is needed about the distance traveled.

Always false

An archer shoots an arrow. Consider the action force to be the bowstring against the arrow. The reaction to this force is the A. Air resistance against the bow. B. Friction of the ground against the archer's feet. C. Combined weight of the arrow and bow string. D. Grip of the archer's hand on the bow. E. Arrow's push against the bowstring.

Arrow's push against the bowstring.

A bird sitting on the limb of a tree is moving about 30 m/s with respect to the sun. If the bird takes 1 second to drop down to a worm below. The worm would be 30 km downrange from the bird when it reached the ground. this faulty reasoning is best countered with Newton's A. Second law B. Law of gravitation C. Third law D. First law E. None of these

First law

A player hits a ball with bat. The action force is the impact of the bat against the ball. The reaction to this force is the A. Weight of the ball B. Weight of the bat C. Grip of the player's hand against the ball D. Air resistance on the ball E. Force that the ball exerts on the bat

Force that the ball exerts on the bat

The scientist to first introduce the concept of inertia was A. Copernicus B. Galileo C. Aristotle D. Newton

Galileo

For an Action force, there must be a reaction force that A. Always acts in the same direction B. Is exactly equal in magnitude C. Is slightly larger in amplitude than the action force D. Is slightly smaller in magnitude than the action force

Is exactly equal in magnitude

If the speed of a moving object doubles, which of the following also doubles? A. Kinetic energy B. Momentum C. Acceleration D. All of the above

Momentum

Neglecting air resistance, a man on a high ladder releases a ball which strikes the ground with 100 J of kinetic energy. If he were to throw it straight upward instead, it will eventually reach the ground with a kinetic energy of A. 100 J B. Less than 100 J C. More than 100 J

More than 100 J

A 1- kg ball dropped from a height of 2 m rebounds only 1.5 m after hitting the ground. The amount of energy converted to heat is about A. 1.0 J B. More than 2.0 J C. 0.5J D. 1.5 J E. 2.0J

More than 2.0 J

If you push for a half hour or a whole hour against a stationary wall A. Half as much work is done during the half hour B. Twice as much work is done during the half hour C. No work on the wall is done in either case. D. It is impossible to determine how much work is done

No work on the wall is done in either case.

A woman carries a heavy box across a room at a constant speed. How much work does she do on the box while walking? A. More information is needed about the weight of the box B. More information is needed about the distance walked C. More information is needed about the weight, distance, and her speed. D. More information is needed about the speed and the distance E. None

None

A light aluminum ball and a heavy lead ball of the same size are allowed to roll down an incline. When They are halfway down the incline, they will have identical A. Momentum B. Kinetic energy C. Potential energy D. Inertias E. None of the above choices

None of the above choices

To change mercury into gold, a pair of protons must be A. Added to the mercury nucleus B. Added to the gold nucleus C. Removed from the mercury nucleus D. Removed from the gold nucleus E. None of the above is true

None of the above is true

A skydiver falls towards the Earth. The attraction of the Earth on the diver pulls the diver down. What is the reaction to this force? A. Air resistance the diver encounters while falling B. The attraction to the planets, stars, and every particle in the universe C. Water resistance that will soon act upward on the diver D. E. None of these

None of these

A jet traveling at 1500 km/hr passes between observers A and B. In a short time a sonic boom will be heard by A. Observer B only B. Observer A only C.Observer A and B but not the pilot D.Observer A, Observer b and the pilot of the jet

Observer A and B but not the pilot

A job is done slowly, while an identical job is done quickly. Both jobs require the same amount of work, but different amounts of A. Power B. Energy C. Effort D. None of these

Power

After rolling halfway down an incline, a marble's kinetic energy is A. The same as its potential energy B. Greater than its potential energy C. Less than its potential energy D. Impossible to determine

The same as its potential energy

A 1000-kg car and 2000-kg car are hoisted the same distance. Raising the more massive car requires A. More than four time as much work. B. Less work C. As much work. D. Twice as much work E. Four times as much work

Twice as much work

If you find that twice as much work is needed to perform a task but it takes twice as much time, the amount of power required is A. Sixteen times as much B. Unchanged C. Twice as much D. Four times as much

Unchanged

An atomic mass unit (amu) is 1/2 the mass of A. a hydrogen atom B. a carbon atom C. a uranium D. a proton E. an electron

a hydrogen atom

Sound waves cannot travel in A. water B. air C. steel D. a vacuum E. any of the above media

a vacuum

A package falls off a truck that is moving at 30 m/s. Neglecting air resistance, the horizontal speed of the package just before it hits the ground is A. more than 30 m/s B. zero C. about 30 m/s D. less than 30 m/s but larger than zero E. more information is needed for an estimate

about 30 m/s

When you stand at rest on a pair of bathroom scales, the readings on the scales will always A. add up to equal your weight B. each be half your weight C. each equal your weight

add up to equal your weight

An object in mechanical equilibrium is an object A. having no acceleration B. at rest C. moving with constant velocity D. all of these

all of these

The vibrations of a longitudinal wave move in a direction A. that changes with speed B. at right angles to the direction of wave travel C. along the direction of wave travel

along the direction of wave travel

According to Newton's law of inertia, a rail raid train in motion should continue going forever even if its engine is turned off. We never observe this because railroad trains A. must go up and down hills B. move too slowly C. always have forces that oppose their motion D. are much too heavy

always have forces that oppose their motion

The vibrations of a transverse wave move in a direction A. along the direction of wave travel B. at right angles to the direction of wave travel C. that changes with speed

at right angles to the direction of wave travel

In a closed bottle are a certain number of hydrogen molecules. In an identical closed bottle at the same temperature and internal pressure are a certain number of nitrogen molecules. Ther bottle with the greater number of molecules is the one containing A. hydrogen B. nitrogen C. both the same

both the same

If no external forces are acting on a moving object, it will A. continue moving at the same velocity B. move slower and slower until it finally stops C. continue moving at the same speed

continue moving at the same velocity

A force that determines the chemical properties of an atom is a(n) A. electrical force B. nuclear force C. fiction force D. gravitational force E. none of these

electrical force

The chemical properties of matter come mostly from its A. neutrons B. protons C. electrons

electrons

A truck is moving at a constant velocity. Inside the storage compartment, a rock is dropped from the midpoint off the ceiling and strikes the floor below. the rock hits the floor A. ahead of the midpoint of the ceiling B. behind the midpoint of the ceiling C. exactly below the midpoint D.more information is needed to solve this problem E.none of these

exactly below the midpoint

A truck is moving at constant velocity. Inside the storage compartment, a rock is dropped from the midpoint of the ceiling and strikes the floor below. The rock hits the floor A. exactly below the midpoint of the ceiling B. ahead of the midpoint of the ceiling C. behind the midpoint of the ceiling D. more information is needed to solve this problem E. none of these

exactly below the midpoint of the ceiling

Whereas Aristotle relied on logic in explaining nature, Galileo relied on A. mathematics B. patterns C. logic also D. experiment

experiment

Whirl a rock at the end of a string and it follows a circular path. If the string breaks, the tendency of the rock is to A. follow a straight-line path B. continue to follow a circular path C. revolve in a smaller circle D. increase its speed

follow a straight-line path

If one neutron is added to a helium nucleus, the result is A. hydrogen B. beryllium C. boron D. helium E. lithium

helium

If your automobile runs out of fuel while you are driving, the engine stops but you do not come to an abrupt stop. The concept that most explains why is A. inertia B. resistance C. acceleration D.gravity

inertia

A sound wave is a A. shock wave B. longitudinal wave C. transverse wave D. standing wave E. none of the above choices are correct

longitudinal wave

Which of these statements is true? A. molecules are the smallest subdivision of matter that still retains chemical properties of a substance B. a molecule is the smallest particle that exists C. molecules form atoms that in turn determine chemical properties of a substance D. chemical elements are made up of about 100 distinct molecules E. none

molecules are the smallest subdivision of matter that still retains chemical properties of a substance

An explosion occurs 34 km away. Since sound travels at 340 m/s, the time it takes for the sound to reach you is A. more than 20 seconds B. 1 second C. 0.1 second D. 10 seconds E. 20 seconds

more than 20 seconds

The reason a granite block is mostly empty space is that the atoms in the granite are A. invisible B.mostly empty space themselves C. not as close together as they could be D. in perpetual motion E. held together by electrical forces

mostly empty space themselves

An object that completes 100 vibrations in 5 seconds has a period of A. 2 seconds B. 0.5 seconds C. 1 second D. none

none

A 1056-hertz tuning fork is sounded at the same time a piano note is struck. You hear three beats per second. What is the frequency of the piano string? A. not enough information to be certain B. 1056 hertz C. 1053 hertz D. 1059 hertz E. 3168 hertz

not enough information to be certain

The weight of matter comes mostly from its A. protons and neutrons B. empty spaces between atoms C. electrons

protons and neutrons

As a ball falls, the action force is the pull of Earth on the ball. The reaction force is the A. air resistance acting against the ball B. pull of the ball's mass on the Earth C. acceleration of the ball D. none of these

pull of the ball's mass on the Earth

Which doesn't belong to the same family? A. shock waves B. radio waves C. ultrasonic waves D. longitudinal waves E. infrasonic waves

radio waves

Caruso is said to have made a crystal chandelier shatter with his voice. This is a demonstration of A. an echo B. resonance C. interference D. beats E. sound refraction

resonance

The force exerted on the tires of a car to directly accelerate it along a road is exerted by the A. tires B. engine C. road D. air E. none of these

road

Which of the following is not a transverse wave? A. sound B. light C. radio D. all E. none

sound

The explanation for refraction must involve a change in A. frequency B. wavelength C. speed D. all of the above choices are true E. none of the above choices are true

speed

Sound travels faster in A. water B. a vacuum C. steel D. air E. sound travels at about the same speed in all of the above media

steel

If we doubled the magnifying power of the most powerful optical microscope in the world, we would A. be able to photograph individual atoms, even though we couldn't see them B. be able to see individual atoms C. still not be able to see or photograph ann atom

still not be able to see or photograph ann atom

An aircraft that flies faster than the speed of sound is said to be A. supersonic B. subsonic C. impossible

supersonic

A sheet of paper can be withdrawn from under a container of milk without toppling it if the paper is jerked quickly. The best demonstrates that. A. gravity tends to hold the milk carton secure B. the milk carton has no acceleration C. the milk carton has inertia D. there is an action-reaction pair of forces E. none of these

the milk carton has inertia

Compared to the atoms that make up the body of an elderly person, the atoms that make up the body of a newborn baby are A. actually older B. newer C. the same age

the same age

In a longitudinal wave the compressions and rarefactions travel in A. the same direction B. opposite direction C. a vacuum

the same direction

Compressions and rarefactions normally travel in A. the same direction in a wave B. opposite directions in a wave C. directions that are at right angles to the wave direction

the same direction in a wave

A car traveling at 100 km/hr strikes an unfortunate bug and splatters it. The force of impact is A. greater on the car B. greater on the bug C. the same for both

the same for both

Which of these statements is true? A. there are only about 100 different kinds of atoms that combine to form all substances B. an atom is the smallest particle known to exit C. there are thousands of different kinds of atoms that account for a wide variety of substances D. a large atom can be photographer with the aid of ordinary microscope E. none

there are only about 100 different kinds of atoms that combine to form all substances

A doppler effect occurs when a source of sound moves A. at right angles to you B. toward you C. both D. none

toward you

Double the frequency of a sound and you halve its A. amplitude B. speed C. wavelength D. all of these E. none of these

wavelength