PHYSICS FINAL

A standing wave occurs when...

A wave reflects upon itself

It takes 6 seconds for a stone that was dropped from rest to fall to the bottom of a mine shaft. How deep is the shaft?

About 180 m

An umbrella tends to move upwards on a windy day principally because...

Air pressure is reduced over the curved top surface.

The amount of gravitational force that acts on the space shuttle while in orbit is...

Almost as much as the shuttle's weight on the Earth's surface.

An object following a straight-line path at a constant speed...

Has zero acceleration

An object at rest near the surface of a distant planet starts to fall freely. If the acceleration there is twice that of the Earth, its speed one second later would be...

20 m/s

An astronaut on another planet drops a 1 kg rock from the rest. The astronaut notices that the rock falls 2 meters straight down in one second. On this planet, how much does the rock weigh?

4 N

A spring is stretched 10 cm by a suspended 1-kg block. If two springs side-by-side are used to suspend the block, so each spring supports half the weight of the block, then each spring will stretch...

5 cm

A metal block has a mass of 5 grams and a volume of 1 cubic centimeter. A piece of the same kind of metal with a volume of 2 cubic centimeters has a density of...

5 g/cc

A person is attracted toward the center of Earth by a 500 N gravitational force. The Earth is attracted toward the person with a force of...

500 N

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...

5000 kg m/s

An unstretched hanging spring is 50 cm long. Suspending a 100-N weight from it makes its length 60 cm. Adding another 100-N weight will make the spring's length...

70 cm

A vehicle that weights 400 N on the surface of the Earth is traveling in outer space at a speed of 400 m/s. It can be stopped by applying a constant force of 20 N for...

800 seconds

A metal block as a density of 5000 kg per cubic meter and a mass of 15,000 kg. What is its volume?

3 cubic meters

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...

3 m

A 1 kg ball is thrown at 10 m/s straight upward. Neglecting air resistance, the net force that acts on the stone when it is halfway to the top of its path is about...

10 N

The force of friction on a sliding object is 10 N. The applied force needed to maintain a constant velocity is

10 N

Buoyant force is greatest on a submerged...

10-newton block of aluminum

The depth to which an inverted drinking glass must be pushed beneath the surface of water so that the volume of enclosed air is squeezed to half is...

10.3 m

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

16 times the KE.

A rock suspended by a string weighs 5 N out of water and 3 N when submerged. What is the buoyant force on the rock?

2 N

An object that completes 20 vibrations in 10 seconds has a frequency of...

2 hertz

Estimate the mass of air inside an average automobile.

2 kilograms

The amplitude of a particular wave is 1 m. The top-to-bottom distance of the disturbance is...

2 m

A scale from which a rock is suspended reads 5 N when the rock is out of water and 3 N when the rock is submerged. The density of the rock is...

2.5 times the density of water

A floating leaf oscillates up and down two complete cycles in one second as a water wave passes by. The wave's wavelength is 10 meters. What is the wave's speed?

20 m/s

A 1 kg chunk of putty moving at 1 m/s collides with and sticks to a 5-kg bowling ball initially at rest. The bowling ball and putty then move with a momentum of...

1 kg m/s

A car accelerates from rest for 5 seconds until it reaches a speed of 20 m/s. What is the car's acceleration in meters per second per second?

4

A positron orbiting an antiproton would make up an atom of...

Anti-hydrogen

The ratio of output force to input force of a hydraulic press will be equal to the ratio of the output and input piston...

Areas

The vibrations of a transverse wave move in a direction...

At right angles to the direction of wave travel.

For light, a red shift indicates that the light source is moving...

Away from you

A bubble of air released from the bottom of a lake...

Becomes larger as it rises

If a pair of helium nuclei are fused together, the result is...

Beryllium

The buoyant force on a rock is least when the rock is entirely submerged...

Buoyant force does not depend on depth

A supplier wants to make a profit by buying metal by weight at one altitude and selling it at the same price per pound at another altitude. The supplier should...

Buy at a high altitude and sell at a low altitude.

If two protons are removed from an oxygen nucleus, the result is...

Carbon

When weight is applied to the top of a stone arch, all of the stone blocks in the arch undergo mostly:

Compression

At a concert the oboe is playing a long steady note as you walk away from the stage at an accelerating velocity toward the rest room. The pitch of the sound that you hear is...

Continually decreasing

If a strong wind from the west breaks a window in the north wall of a house, most of the glass will fall...

Outside the house

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

Decreased

A Doppler effect occurs when a wave emitter or sources of sound moves...

Either towards you or away from you

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...

Follow a straight-line path

A player hits a ball with a bat. The action force is the impact of the bat against the ball. The reaction to this force is the...

Force that the ball exerts on the bat.

If one neutron is added to a helium nucleus, the result is...

Helium

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

Overbaked

The stride of a horse depends somewhat on the pendulum-like swing of its legs. This stride would be higher in frequency if more of the mass in its legs were concentrated...

In the upper part, nearer the horse's body

Suppose you are standing on a very sensitive weighing scale and all of a sudden the atmosphere vanished. The reading on the scale would...

Increase (select answer for decrease potentially - look at notes)

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

Increases

A ring and a disk with the same mass, initially at rest, roll down a hill together. The one to reach the bottom first...

Is the disk

A skydiver steps from a helicopter and falls for a few seconds until he reaches his terminal velocity. Thereafter, until he opens his parachute, his acceleration...

Is zero.

A liter-sized block of ordinary wood floats in water because it is less dense than water. The amount of water displaced is...

Less than 1 liter

If the polar icecaps melted, the resulting water would spread over the entire Earth. This new mass distribution would tend to make the length of a day...

Longer

Each of us weighs a tiny bit less inside the ground floor of a skyscraper than we do on the ground far away from the skyscraper. The reason for this is the...

Mass of the building attracts us upward slightly.

A node is a position of...

Minimum amplitude

Alcohol is less dense than water. If alcohol is used to make a barometer on a day when atmospheric pressure is normal, the height of the alcohol column would be...

More than 10.3

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...

More than 2.0 J

An explosion occurs 34-km away. Since sound travels at 340 m/s, the time it takes for the sound to reach you is...

More than 20 seconds

A solid glass ball weighs 1 newton. One with twice the diameter weighs...

More than 4 N

In cooking a turkey in a conventional oven at a given temperature, compared to a medium-sized turkey, a large turkey takes...

More time per pound to cook

If a monkey floating in faraway outer space throws his hat away, the hat and the monkey will both...

Move away from each other, but at different speeds.

A car with closed windows makes a left hand turn. A helium-filled balloon in the car will...

Move to the left

An object that has kinetic energy must be...

Moving

As a supersonic craft increases in speed, the angles of its V-shaped shock wave becomes...

Narrower

During a single period, the distance traveled by a wave is...

One wavelength

A torque acting on an object tends to produce...

Rotation

If your mass, the mass of the earth, and the mass of everything in the solar system were twice as much as it is now, yet everything stayed the same size, your weight on Earth would...

Quadruple

The great Italian tenor Enrico Caruso is said to have made a crystal chandelier shatter with his voice. This is a demonstration of...

Resonance

A child swings to and fro on a playground swing. If the child stands rather than sits, the time for a to-and-fro swing is...

Shortened

You dip your fingers repeatedly into water and make waves. If you dip your fingers more frequently, the wavelength of the waves...

Shortens

A black hole is...

Simply the remains of a giant star that has undergone gravitational collapse.

Assuming all the atoms exhaled by Julius Caesar in his last dying breath are still in the atmosphere, then we probably breathe one of those atoms with each...

Single breath

A pair of identical balls are simultaneously released on a pair of equal-length frictionless tracks, A and B, as shown here. Both balls reach the end of their tracks at the same:

Speed

Sound travels faster in...

Steel

If we doubled the magnifying power of the most powerful optical microscope in the world, we would...

Still not be able to see or photograph an atom.

If we doubled the power of the most powerful optical microscope in the world, we would...

Still not be able to see or photograph an atom.

When a load is placed on the middle of a horizontal beam supported at each end, the bottom part of the beam undergoes...

Tension

If an astronaut landed on a planet made of antimatter, there would be an explosion and...

The astronaut and an equal amount of the planet would both annihilate.

It is correct to say that impulse is equal to...

The change in momentum it produces.

The reason a life jacket helps you float is...

The density of both you and the jacket together is less than your density alone.

An egg is placed at the bottom of a bowl filled with water. Salt is slowly added to the water until the egg rises and floats. From this experiment, one concludes...

The density of salt water exceeds the density of egg.

A hydraulic press multiplies a force by 100. This multiplication is done at the expense of...

The distance through which the force acts.

A sheet of paper can be withdrawn from under a container of milk without toppling it if the paper is jerked quickly. This best demonstrates that...

The milk carton has inertia

Which is the most responsible for the ocean tides?

The moon

Two identical spring-loaded dart guns are simultaneously fired straight downward. One fires a regular dart; the other a weighted dart. Which dart hits the ground first (ignore air resistance)?

The regular dart.

Compared to the buoyant force that acts on you when you float in fresh water, the buoyant force that acts on you when you float in the dense water of the Dead Sea is...

The same

Compared to the mass of a certain object on Earth, the mass of the same object on the moon is...

The same

If the sun collapsed to a black hole, the Earth's gravitational attraction to it would be...

The same

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...

The same age

A carnival has a Ferris wheel 1 where the seats are located halfway between the center and the outside rim. Compared to another identical Ferris wheel 2 but with seats on the outside rim, your angular speed while riding this Ferris wheel 1 would be...

The same and your tangential speed less.

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

The same as its potential energy

You are sitting on your bed in your dorm room, and suddenly you hear the voice of your ex coming down the hall. You really want to avoid any contact (you broke things off a week ago), and so you want to shut the door. But you don't have time to get up and shut it and act like it wasn't on purpose. It's a total drama, and you need something fast. Sitting beside you, you happen to have a superball (very bouncy) and a ball of clay (very sticky) that you fidget with when you're studying on your bed. What do you do?

Throw the superball at the door.

To catch a ball, a baseball player extends the hand forward before impact with the ball and then lets it ride backward in the direction of the ball's motion. Doing this reduces the force of impact on the player's hand principally because the...

Time of impact is increased.

A guitar string is fixed between two endpoints. The lowest (standing wave) frequency that can be produced on this guitar string has a wavelength _______ as long as the string.

Twice

Sound refraction depends on the fact that the speed of sound is...

Variable

A completely submerged object always displaces its own...

Volume of fluid

Sound travels faster in air if the air temperature is...

Warm

A dam is made thicker at the bottom than at the top partly because...

Water pressure is greater with increasing depth

A balloon is buoyed up with a force equal to the...

Weight of air it displaces

Passengers in a high-flying jumbo jet feel their normal weight in flight, while passengers in the orbiting space shuttle do not. This is because those in the space shuttle are...

Without support forces