Conceptual Physics

A 1056-Hz 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?

1053-Hz

Unlike a transverse wave, a longitudinal wave has no ______.

A longitudinal has all of the above. (Amplitude, speed, frequency, and wavelength)

Two objects move toward each other because of gravitational attraction. As the objects get closer and closer, the force between them ____.

Increases

The reason a charged balloon will stick to a wall is that ____.

Induced opposite charges in the wall are closer than other wall charges.

When two or more waves are at the same place at the same time, the resulting effect is called _____.

Interference

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

Is directed toward the center of the curve

The net charge of an nonionized atom _____.

Is zero

When a sound source moved towards you, what happens to the wave speed?

It stays the same

An electric field has _____.

Magnitude and direction

If the sounding board were left out of a music box, it would _____.

Make little "plinks" that you could barely hear

The distance between successive identical parts of a wave is called its _____.

Wavelength

When an electron is brought near a negatively charged sphere, its potential energy increases. The reason this happens is that _____.

Work was done to bring the charges together

Two like charges ____.

Repel each other

A difference between electrical forces and gravitational forces is that electrical forces include _____.

Repulsive interactions

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

Shortens

To weigh less in the Northern Hemisphere, you should go ___.

South

If you drop a stone into a hole drilled all the way to the other side of Earth, the stone will ____.

Speed up until it gets to the center of the Earth.

A person weighs less at the equator than at the poles. The reason for this has to do with the ____.

Spin of the earth

Electric field lines between two oppositely charged parallel metal plates will be _____.

Straight lines, evenly spaced

Electromagnetic waves are ____.

Transverse waves

The period of an ocean wave is 10 seconds. What is the wave's frequency?

0.1 Hz

Two charges separated a distance of 1 meter exert a 1-N force on each other. If the charges are pulled to a 2-m separation distance, the force on each charge will be ____.

0.25 N

A certain ocean wave has a frequency of 0.05 hertz and a wavelength of 10 meters. what is the wave's speed?

0.5 m/s

A 340-Hz sound wave travels at 340 m/s in air, with a wavelength of ____.

1 m

If you use 10 J of work to push a charge into an electric field and then release the charge, as the charge flies past its starting position, its kinetic energy is ______.

10 J

Two charges separated a distance of 1 meter exert 1-N force on each other. If the charges are pushed to a separation of 1/4 meter, the force on each charge will be ____.

16 N

How many high tides are there normally each day on a typical ocean beach?

2

A leaf on a pond oscillates up and down two complete cycles each second as a water wave passes. What is the waves frequency?

2 hertz

Two waves arrive at the same place at the same time exactly in step with each other. Each wave has an amplitude of 1 m. The resulting wave has an amplitude of ____.

2 m

A swimming area in a rotating space habitat is located in a one-fourth-g region. If a diver can jump 1 m high in a 1-g region, how high can the same diver jump in the swimming area?

4m

Sound waves cannot travel in _____.

A vacuum

If two negative charges are held close together and then released, the charges will _____.

Accelerate away from each other

Protons and electrons ____.

Attract each other

A Doppler effect occurs when a source of sound moves ____.

Away from you, and towards you

Lightening bolts occur between ____.

Both clouds and clouds and the ground

Electrical polarization occurs when _____.

Charge distribution in a neutral molecule separates.

Electrical forces between charges are normally strongest when the charges are _____.

Close together

The SI unit of charge is the _____.

Coulomb

As the sound of a car's horn passes and recedes from you, the pitch of the horn seems to ____.

Decrease

The direction of electric field lines show the ____.

Direction of the force on a test positive charge

Coulomb's law says that the force between any two charges depends _____.

Directly in the size of the charges and inversely on the square of the distance between the charges

Suppose you touch a negatively charged object to a metal sphere so that electrons move from the charged object onto the sphere. after far separation of the charged object, electrons on the sphere will be _____.

Distributed evenly over the sphere's surface

A lunar eclipse happens when ____.

Earth is between the moon and the sun

Which is more, the gravitational force between Earth and the moon, or between Earth and the sun?

Earth-sun

A volt is a unit of ____.

Electric potential

Electric potential is defined as _____.

Electric potential energy of a charge divided by the quantity of the charge

If you whirl a tin can on the end of a string and the string suddenly breaks, the can will ____.

Fly off, tangent to its circular path

If you walk into a region of space and suddenly feel a force, the space is said to contain a _____.

Force field

The color of an object we see is determined by the ____.

Frequencies of light absorbed by the object, colors of light reflected by the object, frequencies of light reflected by the object, and colors of light shining on the object.

A black hole is an object that _____.

Has an enormous gravitational field near it, has an enormous density, has an escape speed greater than the speed of light, and alters the space around it

A small, positively charged object near a positively charged sphere is moved closer to the sphere. The electric potential energy of the small object _____.

Increases

If the mass of Earth increased, with no change in radius, your weight would ____.

Increases

Stunt motorcyclist Biker Bob rides his bike inside a futuristic rotating space station - a giant rotating donut-shaped structure in space. The normal support force feels like weight to him. As he rides his bike in the same direction that the station rotates, the normal force _____.

Increases

When a star collapses to form a black hole, its mass ____.

Remains the same

An electroscope is charged positively, as shown by foil leaved that stand apart. As a negative charge is brought close to the electroscope, the leaves ____.

Move closer together

The charge of an electron is ____.

Negative

If you comb your hair and the comb becomes positively charged, your hair becomes ____.

Negatively charged

There are two main processes going on in the sun that keep the sun in existence. These processes are gravitation and _____.

Nuclear fusion

Two charged particles held close to each other are released. As they move, the force on each particle increases. Therefore, the particles have _____.

Opposite signs

The time needed for a wave to make one complete cycle is its ____.

Period

A negatively charged rod is brought near a metal can that rests on a wood table. You touch the opposite side of the can momentarily with your finger. The can is then ____.

Positively charged

Atomic nuclei of almost all elements consist of _____.

Protons and neutrons

Consider the gravitational force between the earth and a meteor in outer space. If the meteor moves so its distance from the earth's center doubles, the graviational force on the meteor will be _____.

Quadruple

When the distance between two charges is halved, the electrical force between the charges _____.

Quadruples

A solar eclipse happens when ____.

The moon is between the Earth and the sun

The Doppler effect is the change in observed frequency due to ____.

The motion of the source or observer

Two charged particles held near each other are released. As they move, the acceleration of each decreases. Therefore, the particles have ____.

The same sign

In a good insulator, electrons are usually _____.

Tightly bound in place

After you rub a balloon on your hair, the balloon will likely be charged _____.

To several thousand volts

Two parallel plates are oppositely charged. The left plate is negative and the right plate is positive. In which direction does the electric field point?

To the left

Objects can be charged by _____.

Touching, induction, and friction

A wave created by shaking a rope up and down is called a _____.

Transverse wave

A possible space habitat of the future is a cylinder in space rotating about its long axis. What is the relative gravitational field along the axis of the habitat?

Zero

Suppose a hollow metal sphere has a large negative charge on it. The electric field strength inside the sphere is _____.

Zero

The electric field inside an uncharged metal ball is zero. If the ball is negatively charged, the electric field inside the ball must be ____.

Zero

The electric field outside a Van de Graaff generator may be enormous, while inside the spherical dome, the electrical field is _____.

Zero