If a magnet produces a force on a current-carrying wire, the wire
A) produces a force on the magnet.
B) may or may not produce a force on the magnet.
C) none of these
Answer:
The laser light that can carry more information is
A) red.
B) blue.
C) either of these
D) neither of these
Answer:
When condensation occurs inside your bedroom window, the air outside is appreciably
A) colder.
B) warmer.
C) both of these
D) neither of these
Answer:
Which is a useful property of a prism?
A) internally reflects 100% of incident light
B) changes directions of light in a variety of ways
C) re-inverts images
D) all the above
E) none of the above
Answer:
When an object of mass m is pushed to relativistic speed v, its momentum is
A) greater than mv.
B) smaller than mv.
C) equal to mv.
Answer:
A hypothetical atom has four distinct energy states. Assuming all transitions are
possible, the number of spectral lines this atom can produce is
A) 5.
B) 6.
C) 7.
D) 8.
E) more than 8.
Answer:
The weight of air in a column 1-m2 in cross section that extends from sea level to the
top of the atmosphere is
A) 101 N.
B) 10,100 N.
C) 101,000 N.
D) 101,000,000 N.
Answer:
An atom that absorbs a certain amount of energy can then emit
A) only a photon of that energy.
B) a photon of any energy.
C) a photon of the same or higher energy.
D) a photon of the same or lower energy.
Answer:
Tension is actually a force that tends to
A) stretch something.
B) compress something.
C) break something.
D) balance something.
Answer:
The main difference between a fog and a cloud is
A) water vapor content.
B) density of vapor.
C) seeding.
D) altitude.
E) temperature.
Answer:
To connect a pair of resistors so their equivalent resistance (the single resistor having
their combined value) will increase, connect them in
A) series.
B) parallel.
C) either of these
Answer:
Compared to a sound of 40 decibels, the intensity of a sound of 50 decibels is
A) 10 times as much.
B) 100 times as much.
C) 1000 times as much.
D) 10,000 times as much.
E) more than 10,000 times as much.
Answer:
An ice cube floating in a glass of water contains many air bubbles. When the ice melts,
the water level will
A) rise.
B) fall.
C) remain unchanged.
Answer:
A toy elevator is raised from the ground floor to the second floor in 20 seconds. The
power needed using 1000 J of work, is
A) 20 W.
B) 50 W.
C) 100 W.
D) 1000 W.
E) 20,000 W.
Answer:
The inversion of your image in a plane mirror is actually an inversion of
A) left-right.
B) up-down.
C) front-back.
D) all of the above
Answer:
The Ritz combination principle states that the sum of the
A) frequencies of two lines in a spectrum often equal the frequency of a third line.
B) energies associated with two lines in a spectrum often equal the energy associated
with a third line.
C) energy transitions of quantum jumps is consistent with the conservation of energy.
D) all of the above
E) none of the above
Answer:
Although plutonium alone is chemically toxic, it is not toxic when
A) oxidized.
B) ionized.
C) subcritical.
D) none of the above
Answer:
A current-carrying coil of wire is
A) a superconductor.
B) a superconducting magnet.
C) an electromagnet.
D) a magplane in the making.
Answer:
As soon as a bowling ball rolls off the edge of a table its horizontal component of
velocity
A) decreases.
B) remains constant.
C) increases.
Answer:
If you hold two objects that have the same weight density, then they
A) may have unequal mass densities.
B) have equal mass densities.
C) are equal in weight.
Answer:
While a rock thrown upward at 50 degrees to the horizontal rises, neglecting air drag,
its vertical component of velocity
A) increases.
B) remains unchanged.
C) decreases.
Answer:
A nucleon is either a
A) positron or an electron.
B) proton or an electron.
C) neutron or an electron.
D) proton or a neutron.
Answer:
An object that completes 20 vibrations in 10 seconds has a frequency of
A) 0.5 hertz.
B) 1 hertz.
C) 2 hertz.
D) 200 hertz.
Answer:
If you move a clock from Earth to the Moon, the clock runs
A) slower.
B) no differently.
C) faster.
Answer:
When light is refracted, there is a change in its
A) frequency.
B) wavelength.
C) both of these
D) neither of these
Answer:
Generally speaking, the larger a nucleus is, the greater its
A) stability.
B) instability.
C) neither stability nor instability
Answer:
The amount of solar energy per square meter atop the atmosphere at right angles to the
Sun’s rays is about
A) 700 joules.
B) 1000 joules.
C) 1400 joules.
D) much more than 1400 joules.
Answer:
X-rays are similar to
A) alpha rays.
B) beta rays.
C) gamma rays.
D) all of the above
E) none of the above
Answer:
The helium in a child’s balloon is composed of
A) former alpha-particle.
B) former beta particles.
C) both of these
D) neither of these
Answer:
Which is the smallest particle?
A) molecule
B) atom
C) proton
D) neutron
E) quark
Answer:
To become a positive ion, an atom must
A) lose an electron.
B) gain an electron.
C) lose a proton.
D) gain a proton.
Answer:
Which eats more for its size (volume)?
1) a man
2) a mouse
3) an elephant
4) each eats approximately an amount of food in proportion to its size.
This is because
5) the smaller the animal is, the more radiating area it has proportional to its volume.
6) the larger the animal is, the more radiating area it has proportional to its volume.
7) neither of these has any bearing on the dietary behavior of living creatures.
Answer:
Figure N-8
The trajectory of a cannonball fired from a canon depends on
1) the initial velocity.
2) the angle of projection.
3) the effects of air resistance.
4) all of these.
When air resistance does affect motion, the cannonball doesn’t travel
5) as high.
6) as far.
7) as high and as far.
Answer:
Electric potential energy is measured in
1) amperes.
2) volts.
3) joules.
4) watts
and electric potential is measure in
5) amperes.
6) volts.
7) joules.
8) watts
Answer:
Figure V-8
Which of the sailboats shown sails fastest in its forward direction?
1) 1
2) 2
3) 3
4) None sails forward.
It is interesting to note that the force of the wind impact is
5) nonexistent on each sail.
6) greatest on 1.
7) greatest on 2.
8) greatest on 3.
Answer:
Your lab instructor projects a ball horizontally from a lab bench that lands on the floor a
horizontal distance away. Compared with the time the ball would take if simply
dropped vertically from the bench, the time in the air for the projected ball is
1) less.
2) the same.
3) greater.
The horizontal distance from the bottom of the bench the ball travels in hitting the floor
is equal the ball’s initial speed
4) multiplied by its time in the air.
5) coupled with its speed of fall.
6) squared plus its downward speed squared when hitting the floor.
Answer:
An object is accelerating if it moves
1) with constant velocity
2) in a circular path
3) in a straight-line path
because it is undergoing a change in its
4) speed.
5) direction.
6) net force.
Answer:
A device that transforms electrical energy to mechanical energy is
1) a generator,
2) a motor,
3) a transformer,
4) any common magnet,
and a device that transforms mechanical energy into electrical energy is a
5) generator.
6) motor.
7) transformer.
Answer:
A radioactive isotope has a half-life of one month. At the end of one month, the amount
of the original isotope still remaining is
1) none,
2) one-quarter,
3) one-half,
4) three-fourths,
and at the end of two months, the amount of original isotope remaining is
5) none.
6) one-fourth.
7) one-half.
8) three-fourths.
Answer:
The body chiefly responsible for ocean tides is the
1) Moon,
2) Sun,
chiefly because
3) the Moon is closer to Earth than the sun.
4) gravitational pull by the Moon is less than that of the sun.
5) the difference between the Moon’s pull on the near and far sides of Earth is
appreciable.
Answer:
Strictly speaking, if a beam of white light is shone through a piece of very thick glass,
the first color to emerge from the other side is
1) white.
2) violet.
3) red.
4) green.
This is because
5) all frequencies travel at c.
6) lower frequencies undergo more refraction in a medium.
7) higher frequencies of light travel at a faster average speed through a medium.
8) higher frequencies of light interact with more molecules in a medium.
Answer:
If the polar ice caps melted and flowed toward the equator, the rotation of Earth would
tend to
1) decrease in angular speed,
2) be unchanged,
3) increase in angular speed,
with the result that the day would be
4) slightly longer.
5) slightly shorter.
6) unaffected.
Answer:
Compared to a ship floating in salt water, a ship floating in fresh water displaces
1) a greater weight of water,
2) a lesser weight of water,
3) the same weight of water,
and it also displaces
4) a greater volume of water.
5) a lesser volume of water.
6) the same volume of water.
Answer:
Figure E/M-4
Refer to the figure above. Assume the switch in the primary has been closed for a few
minutes. Then there is a current in the
1) primary, but not the secondary.
2) secondary, but not the primary.
3) primary and secondary.
4) neither the primary nor the secondary.
When the switch is opened suddenly, current in the primary
5) decreases, while current builds up in the secondary.
6) increases, while current decreases in the secondary.
Answer:
A 200-N weight hangs motionless from a string that is attached to the ceiling. The net
force acting on the weight is
1) zero,
2) 100 N,
3) 200 N,
and if the string breaks, the net force acting on the weight will be
4) zero.
5) 100 N.
6) 200 N.
Answer:
A cubic meter of lead which weighs 105 N is submerged in water. The buoyant force
acting on it is about
1) the weight of a cubic meter of water, 104 N
2) half the weight of lead, 1/2 x 105 N
3) the weight of lead, 105 N
because
4) the block loses half its apparent weight when suspended in water.
5) the block displaces 105 N of water.
6) the volume of water displaced is one cubic meter.
Answer:
You can exert more force on the pedals of a bicycle if you pull up on the handlebars
because
1) your center of gravity can be shifted to a position directly above the pedals,
2) the handlebars, in turn, pull down on you and this force is transmitted to the pedals,
3) rotational inertia is lessened,
4) rotational inertia is increased,
all of which illustrates
5) that equilibrium is center-of-gravity dependent.
6) the law of action and reaction.
7) inertia may be both linear and rotational.
Answer:
An object is dropped from a position of rest. At the end of the first second of free fall it
will have traveled about
1) 0 m
2) 5 m
3) 10 m
and its velocity will be about
4) 0 m/s.
5) 5 m/s.
6) 10 m/s.
Answer:
Figure T-3
The 50-kg stuntman places a 50-kg uniform 6-meter plank on top of a skyscraper and
stands on the tip of it that overhangs the building as shown. What is the approximate
distance that the overhang can be extended without disaster?
1) 0.5 m
2) 1 m
3) 1.5 m
If the 6-meter board has a mass of only 25 kilograms, then the maximum overhang
distance would be about
5) 0.5 m.
6) 1 m.
7) 1.5 m.
8) 2 m.
Answer:
A long horizontal wooden beam supported at its ends sags when you sit in the middle.
Due to bending, the top part of the beam is under
1) tension.
2) compression.
And the bottom of the beam is under
3) tension.
4) compression.
And the part of a beam where no tension or compression occurs
5) along the center of the beam.
6) along the neutral layer.
7) both of these
8) none of these
Answer: