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To reduce the danger of self-induction
A) simply pull the circuit plug.
B) turn off the switch to the circuit.
C) either of these
D) neither of these
Answer:
Which of the following are electrically neutral?
A) protons
B) neutrons
C) electrons
D) ions
E) none of the above
Answer:
If wavelengths of emitted light become longer, the energy per photon of light
A) increases.
B) remains constant.
C) decreases.
D) none of the above
Answer:
One side of the Moon continually facing Earth is
A) a passing phenomenon.
B) a cosmic coincidence.
C) tidal lock.
Answer:
The Bernoulli effect causes fast-moving vans on the highway to be drawn together
when
A) air speeds up in passing between them.
B) air between them stagnates.
C) they experience lift.
D) all of the above
Answer:
Harry places a new air conditioner in the middle of his hot room, which when operating
A) cools the room.
B) further warms the room.
C) neither of these
Answer:
The clock on the Big Ben Tower in London reads 12 noon. If you travel away from the
clock at a very high speed and view it with a telescope, you would see
A) run slower than a clock in your vehicle.
B) run faster than a clock in your vehicle.
C) be frozen at 12 noon.
Answer:
When most substances are heated, molecules inside move faster and take up more
space, resulting in thermal
A) bending.
B) expansion.
C) contraction.
D) heat.
Answer:
Newton's Cradle consists of an aligned row of identical elastic balls suspended by
strings so they barely touch one another. When two balls are raised from one end and
released, they strike the row and two balls pop out from the other end. If instead, one
ball popped out with twice the speed of the two, this would violate
A) momentum conservation.
B) energy conservation.
C) both of these
D) none of these
Answer:
A bicycle that travels four as fast as another when braking to a stop will skid
A) twice as far.
B) four times as far.
C) eight times as far
D) sixteen times as far.
E) depends on the mass of the bike
Answer:
A car's engine is 20% efficient. When cruising, the car encounters an average retarding
force of 1000 N. If the energy content of fuel is 40 megajoules per liter, how many
kilometers per liter does the car achieve?
A) 8
B) 10
C) 12
D) 14
E) none of the above
Answer:
A 10-kilogram block is pushed across a horizontal surface with a horizontal force of 20
N against a friction force of 10 N. The acceleration of the block is
A) 1 m/s2.
B) 2 m/s2.
C) 5 m/s2.
D) 10 m/s2.
E) none of the above
Answer:
Light travels slightly slower in the
A) upper atmosphere.
B) lower atmosphere.
C) neither of these
Answer:
When ice floats in water, a small part of it extends above the surface. Interestingly, the
volume of ice that extends above the surface is equal to the volume of the
A) water the ice displaces.
B) vast number of open spaces in all the hexagonal ice crystals.
C) both of these
D) neither of these
Answer:
A rock is thrown vertically into the air. At the top of its path the net force on it is
A) less than mg.
B) mg.
C) more than mg.
Answer:
Monochromatic light is light of a single
A) wavelength.
B) frequency.
C) color.
D) all of the above
E) none of the above
Answer:
The polarization axes of glasses for 3-D viewing are
A) vertical.
B) horizontal.
C) at right angles to each other.
Answer:
The effects of scaling are beneficial to swimmers in a race who are relatively
A) large.
B) small.
C) neither of these
Answer:
In units of measurement, power in watts is equal to
A) amperes x ohms.
B) amperes x volts.
C) amperes/second.
D) volts/second.
E) none of the above
Answer:
The greater the frequency of the illuminating light on a photosensitive surface, the
greater the
A) number of ejected electrons.
B) velocity of ejected electrons.
C) both of these
D) neither of these
Answer:
A satellite in an elliptical orbit about a planet travels much faster when it is directly
over a
A) large ocean.
B) large island.
C) high mountain range.
D) great plain or plateau.
E) none of the above
Answer:
Nellie tosses a ball upward at an angle. Assuming no air resistance, which component
of velocity changes with time?
A) the horizontal component
B) the vertical component
C) both of these
D) neither of these
Answer:
Our eyes are not very good at seeing
A) motion at our peripheries.
B) differences in brightness.
C) color in dim light.
D) all of the above
E) none of the above
Answer:
Hydrogen, like electricity, is
A) an energy source.
B) not an energy source.
C) a source of both thermal and electric power.
Answer:
In the electron-wave model of the atom, an electron in the second energy level contains
A) a single wavelength.
B) two wavelengths.
C) any number of wavelengths.
D) none of the above
Answer:
One kilowatt-hour is a unit of
A) energy.
B) power.
C) voltage.
D) current.
E) resistance.
Answer:
If an object falling freely were somehow equipped with an odometer to measure the
distance it travels, then the amount of distance it travels each succeeding second would
be
A) constant.
B) less and less each second.
C) greater than the second before.
D) doubled.
Answer:
Compared with the wavelengths of visible light, the wavelengths of matter waves in
atoms are relatively
A) long.
B) short.
C) neither, for all are the same.
Answer:
A 5-N block of wood is difficult to fully submerge in a pool of mercury because the
buoyant force on the block when submerged is
A) less than 5 N.
B) 5 N.
C) much more than 5 N.
Answer:
The source of all magnetism is
A) tiny pieces of iron.
B) tiny domains of aligned atoms.
C) ferromagnetic materials.
D) moving electric charge.
E) none of the above
Answer:
Superposition of waves can produce
A) reinforcement.
B) cancellation.
C) partial cancellation.
D) all the above
Answer:
Two 2-m/s pool balls roll toward each other and collide. Suppose after bouncing apart
each moves at 4 m/s. This collision violates the conservation of
A) momentum.
B) energy.
C) both momentum and energy.
D) none of the above
Answer:
An ice cube with large air bubbles in it floats in a brim-full container of water. When
the ice cube melts,
A) water spills over.
B) no change in water level occurs.
C) water level in the container goes down.
Answer:
As a balloon high in the atmosphere descends, it undergoes a decrease in
A) volume.
B) density.
C) weight.
D) mass.
E) none of the above
Answer:
Electric potential, measured in volts, is the ratio of electric energy to the amount of
electric
A) current.
B) resistance.
C) charge.
D) voltage.
E) none of the above
Answer:
The ratio of the circumference of any circle to its diameter is π. Similarly, the ratio of
the energy of any photon to its frequency is
1) h, Planck's constant,
2) uncertain, unlike π,
3) the wavelength of the photon,
4) c, the photon's speed,
which is
5) a basic constant of nature setting a lower limit on the smallness of things.
6) a basic constant of nature setting an upper limit on the speed of things.
Answer:
If all potatoes are selling at the same price per kilogram, a housewife who plans to peel
the potatoes would get more potato for her money if she bought
1) small potatoes.
2) medium potatoes.
3) large potatoes.
4) no difference.
This is because she
5) would get more potatoes per kilogram.
6) would get less potatoes per kilogram.
7) would get less peelings because of less surface area per pound.
8) buys weight, so any size per kilogram gives the same mass of potatoes.
Answer:
The quantity that tells how warm or cold a body is with respect to some standard body
is called
1) heat.
2) internal energy.
3) temperature.
4) molecular kinetic energy.
The internal energy that is transferred from one body to another because of a
temperature difference is called
5) heat.
6) potential energy.
7) temperature.
8) molecular kinetic energy.
Answer:
A golf ball moving forward with 1 unit of momentum strikes a heavy bowling ball that
is initially at rest. After the golf ball bounces backward, the bowling ball is in motion
with a momentum that must be
1) 1 unit.
2) more than 1 unit.
3) less than 1 unit.
The magnitude of the golf ball's momentum after collision must be somewhat less than
1 unit, for otherwise a violation would occur in the conservation of
4) energy.
5) momentum.
6) both.
7) neither.
Answer:
If you push with 200 N of force against your 1500-N refrigerator and it slides across
your kitchen floor at constant velocity, friction of the floor against the refrigerator must
be
1) zero,
2) 200 N,
3) 1300 N,
4) 1500 N,
5) greater than 1500 N,
and the force with which you push must be
6) equal and oppositely directed to the friction force.
7) the action force, and the friction the reaction force.
8) both of these.
9) none of these.
Answer:
Figure M-6
It would be easier to pull the hemispheres apart
1) when they are at sea level
2) if submerged several meters in water
3) if high above the clouds
because
4) external pressure on the hemispheres is lessened.
5) water serves as a lubricant.
6) the atmosphere exerts a pressure of 105 N/m2 on both hemispheres.
Answer:
Atmospheric pressure is 105 N/m2 at sea level. This means that
1) a column of air 1 square meter in cross section extending up to the top of the
atmosphere weighs 105 N,
2) the weight of one cubic meter of air at sea level is about 105 N,
3) the density of air is 105 N/m3,
and the force of the atmosphere against a surface of one square meter is
4) somewhat less than 105 N.
5) about 105 N.
6) considerably more than 105 N.
Answer:
When we drink through a straw, the liquid is actually
1) pulled up
2) sucked up
3) pushed up
by
4) atmospheric pressure.
5) reduced pressure in the straw.
6) surface tension.
7) capillarity.
Answer:
Figure S-1
Which wave has the greatest period of oscillation?
1) Wave I
2) Wave II
3) Wave III
4) Wave IV
If the waves have the same frequency, which is going by with the greatest speed?
5) Wave I
6) Wave II
7) Wave III
8) Wave IV
9) all have the same speed
Answer:
To drop a package to Earth from a satellite, project it
1) straight downward.
2) ahead at satellite speed.
3) behind at satellite speed.
With a speed of projection
4) less than satellite speed.
5) that matches satellite speed.
6) greater than satellite speed.
7) none of the above
Answer:
When an ice cube in a glass of water melts, the water level will
1) rise.
2) fall.
3) remain the same.
If the ice cube contains many air bubbles, after melting the water level will
4) rise.
5) fall.
6) remain the same.
Answer:
A ray of light is incident on a pane of common window glass at an angle of 35o to the
normal. The angle of the reflected ray with respect to the normal is
1) 35o
2) 55o
3) 90o
4) 20o
and the refracted ray within the glass may be at an angle of
5) 35o.
6) 55o.
7) 22o.
8) 75o.
Answer:
Figure N-6
Two 50-N weights pull on the scale as shown. The reading on the scale is
1) 0 N.
2) 25 N.
3) 50 N.
4) 100 N.
This is clearer to understand if we think of the situation this way:
5) Since no acceleration is taking place, the forces cancel one another.
6) One of the weights "holds" the scale while the other weight stretches the spring.
7) The two hanging weights provide forces that constitute an action/reaction pair.
Answer:
When a metal plate with a hole in it is cooled, the size of the hole becomes
1) smaller,
2) larger,
3) remains the same size,
and when the plate is heated, the hole becomes
4) smaller.
5) larger.
6) remains the same size.
Answer:
For three identical lamps in parallel with a 1.5-volt dry cell, the voltage across the lower
lamp is
1) 1/2 V.
2) 1 V.
3) 1.5 V.
4) 3 V.
If that lamp is disconnected, the other two lamps will
5) glow the same.
6) glow much more brightly.
7) glow much more dimly.
Answer:
Radioactive isotope A has a half-life of one year, while radioactive isotope B has a
half-life of one day. If equal numbers of atoms of each are present, which will give the
highest reading on a Geiger counter?
1) A
2) B
3) both the same
How much of the original sample of radioactive isotope A will be left at the end of the
second year?
4) none
5) one-quarter
6) one-half
7) one-eighth
Answer:
