PHYS Missed Final Questions

Charge flows in a closed circuit

True

In a simple circuit containing a bulb, energy is given to the moving charges by

a generator

A whitish sky is evidence that the atmosphere contains

a mixture of particles

A good heat conductor is

a poor insulator

Which of the following can be projected onto a viewing screen?

a real image

The unit of electric charge, the coulomb, is the charge on

a specific large number of electrons

Objects that radiate relatively well

absorb radiation relatively well

When a solid is changed to a liquid state, the solid

absorbs energy

You can briefly touch a hot clothes iron with a bare wet finger because the wetness

absorbs energy in vaporizing and provides an insulating layer after it changes state

The principal advantage of ac power over dc power is that

ac voltage can be transformed via conventional transformers

When there is a change in the magnetic field in a closed loop of wire

all of these: a voltage is induced in the wire a current is created in the loop of wire electromagnetic induction occurs

Moving electric charges will interact with

an electric field and a magnetic field

Glass is transparent to wave frequencies that

are below its natural frequencies

If a steady magnetic field exerts a force on a moving charge, that force is directed

at right angles to the direction of the motion

The vibrations of a transverse wave move in a direction

at right angles to the direction of wave travel

The source of electrons lighting an incandescent ac light bulb is

atoms in the light bulb filament

An electron and a proton

attract each other

If you want to cook eggs by boiling them while in the mountains, then compared to sea-level cooking, you should

boil the eggs for a longer time

If a light signal and a radio signal were emitted simultaneously from Alpha Centauri, the first to reach Earth would be the

both at the same time

If glass expanded more than mercury, then the column of mercury in a mercury thermometer would rise when the temperature

decreases

When a volume of air is compressed, its temperature

decreases

The fundamental force underlying all chemical reactions is

electrical

When we say an appliance "uses up electricity," we really are saying that

electron kinetic energy is changed into heat and other forms of energy

The output power of an ideal transformer is

equal to the input power

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

fall closer together

The part of the electromagnetic spectrum most absorbed by water is

infrared

Magnetic domains normally occur in

iron

If the waves are going by at the same frequency, the wave that has the greatest speed will have the greatest

length

The incident light ray, the reflected light ray, and the normal between them

lie in the same plane

Power is transmitted at high voltages because the corresponding current in the wires is

low

Glass is opaque to wave frequencies that

match its natural frequencies

A wire that carries an electric current

may be electrically charged

When two lamps are connected in series to a battery, the electrical resistance that the battery senses is

more than the resistance of either lamp

The electric field inside the dome of a Van de Graaff generator depends on

neither it's size or amount of charge on it

Double the frequency of sound and you also double its

none of these: wavelength speed amplitude

A wave travels an average distance of 1 meter in 1 second with a frequency of 1 hertz. Its amplitude is

not enough information

To say that one wave is out of phase with another is to say that the waves are

out of step

Modern automobile headlights are connected in

parallel

The headlights, radio, and defroster fan in an automobile are connected in

parallel with a switch for each

The whiteness of clouds is evidence in the clouds for a variety of

particle sizes

A sound source of high frequency emits a high

pitch

A negatively charged rod is held near a metal can that rests on a dry wood table. If you touch the opposite side of the can momentarily with your finger the can is then

positively charged

A Thermos bottle has double glass walls with silver coating on the glass surfaces that face one another. The silver coating reduces the energy that is transferred by

radiation

Reverberation is actually a case of

re-echoed sound

When a bar magnet is thrust into a coil of copper wire, the coil tends to

repel the magnet as it enters

When you tune a radio to a certain station, you match the frequency of the internal electrical circuit to the frequency of the wanted radio station. In so doing you are employing the principle of

resonance

When ultraviolet light is incident upon glass, atoms in the glass

resonate

In an electric circuit, the safety fuse is connected to the circuit in

series

The higher the temperature of an object,

shorter the wavelengths it radiates.

The pendulum with the greatest frequency is the pendulum with the

shortest period and shortest length

Morning dew on the grass is a result of

slow-moving molecules condensing on the grass

Which of the following is fundamentally different from the others?

sound waves

If the voltage produced by a generator alternates, it does so because

the changing magnetic field that produces it alternates

Two lamps, one with a thick filament and one with a thin filament, are connected in series. The current is greater in the lamp with the

thick filament

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

toward you

Sound waves can interfere with one another so that no sound results

true

If a magnet is pushed into a coil, voltage is induced across the coil. If the same magnet is pushed into a coil with twice the number of loops,

twice as much voltage is induced

The food in a refrigerator is cooled by

vaporization of the refrigerating fluid.

The cooling effect inside a refrigerator is produced by

vaporizing the refrigeration liquid

A 4-ohm resistor is connected in parallel with a 6-ohm resistor. This combination produces an equivalent resistance of

2.4 ohms

The approximate range of human hearing is

20 hertz to 20,000 hertz

Two identical blocks of iron, one at 10 degrees C and the other at 20 degrees C, are put in contact. Suppose the cooler block cools to 5 degrees C and the warmer block warms to 25 degrees C. This would violate the

2nd law of thermodynamics

The temperature at the bottom of Lake Tahoe, high in the Sierra Nevada Mountains in California, at this moment is

4 degrees Celsius

To increase the temperature of 50 grams of water by 2 Celsius degrees requires

4.18 calories

A certain transformer doubles input voltage. If the primary coil has 10 A of current, then the current in the secondary coil is

5 A

A coulomb of charge that passes through a 6-volt battery is given

6 Joules

Assume that 10 J of work is needed to push a charge, at rest, into an electric field. After the charge is released there, it flies back to its starting position and its kinetic energy there will be

10 J

A diver shines light up to the surface of a smooth pond at a 10 degree angle to the normal. Some light passes into the air above, and the part that reflects back into the water makes an angle to the normal of

10 degrees

Which could burn a boy scout the most?

100 g of steam at 100 degrees C

When a pair of 1-ohm resistors are connected in series, their combined resistance is

2 ohms, and when in parallel, 1/2 ohms

The operation of a geyser such as, Old Faithful in Yellowstone, is most like

Coffee Percolator

To turn ice at zero degrees Celsius to water at zero degrees Celsius, we must add

Energy

Two charged particles attract each other with a force F. If the charges of both particles are doubled, and the distance between them also doubled, then the force of attraction will be

F

Food in a pressure cooker is cooked faster because of the

Higher temperature

If waves are going by at the same speed, the wave with the greatest period of oscillation is the wave that has the greatest

None of the above: amplitude length frequency

A dolphin perceives its environment by the sense of

both sight and sound

Which body glows with electromagnetic waves?

both the Sun and the Earth

Light refracts when traveling from air into glass because light

changes speed

Magnetic field lines about a current-carrying wire

circle the wire in closed loops

If air were a better conductor than it is, at nighttime the Earth would be

considerably colder

Blow on your hand with your open mouth and you feel the warmth of your breath. Pucker your lips so your breath expands as you blow and your breath is

cooler

Melting snow

cools the surrounding air

A sheet of red paper will look black when illuminated with

cyan light

Consider a sample of ice at 0 degrees C. If the temperature is decreased, the volume of the ice

decreases

A device that transforms mechanical energy into electrical energy is a

generator

Alternating current is normally produced by a

generator

The reason the sun's radiant energy is of shorter wavelengths than the Earth's is because the sun

has a higher temperature than Earth

The moderate temperatures of islands throughout the world has much to do with water's

high specific heat

Compared to a giant iceberg, a hot cup of coffee has

higher temperature, but less internal energy

An object will normally be a net radiator of energy when its temperature is

higher than it's surroundings

The function of polarizing filters in viewing 3-D slides or movies is to provide each eye

in independent left or right-eye view

Compressions and rarefactions normally travel in

in the same direction as the wave

Your refrigerator is in your kitchen. If you try to cool your kitchen on a hot day by operating your refrigerator with its door open, the kitchen temperature will

increase

Heat a copper wire and its electric resistance

increases

A step-up transformer increases

voltage

When water vapor condenses on the inside of a window, the room becomes slightly

warmer

If a volume of air is warmed, it expands. If a volume of air expands, it

warms

A woman experiences an electrical shock. The electrons making the shock come from the

woman's body

The number of electrons delivered daily to an average American home by an average power utility in the mid 1980s was

zero