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A gun with a muzzle velocity of 100 m/s is fired horizontally from a tower. Neglecting
air resistance, how far downrange will the bullet be 1 second later?
A) 50 m
B) 98 m
C) 100 m
D) 490 m
E) none of the above
How many protons should be added to the nuclei of oxygen atoms so the resulting gas
will glow red when an electric current is in it?
A) 1
B) 2
C) 3
D) 4
E) none of the above
A base fiddle is louder than a harp because of its
A) thicker strings.
B) sounding board.
C) lower pitch.
D) all of the above
E) none of the above
While you are standing in the aisle of a bus, the driver suddenly makes a left turn. You
lurch to the right due to
A) an unbalanced force.
B) your tendency to keep moving forward.
C) an equilibrium challenge.
When a gas is heated and becomes a plasma, its electric charge is usually
A) balanced.
B) negative.
C) positive.
D) non-existent.
E) none of these
Katelyn runs along the aisle of a train that moves at 8 m/s. Her speed relative to the
floor is 3 m/s. Her speed relative to an observer at rest on the ground is
A) 5 m/s.
B) 11 m/s.
C) either depending on her running direction
D) none of the above
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
If you toss a coin straight upward in train that slows while the coin is in the air, the coin
will land
A) as if you were at rest.
B) in front of you.
C) in back of you.
The difficulty of taking a photograph of an atom with light is
A) unwanted diffraction.
B) that atoms are smaller than wavelengths of light.
C) both of these
D) neither of these
Compared with a force, a torque involves
A) rotation.
B) leverage.
C) distance from an axis of rotation.
D) all the above
A kilogram is a measure of an object's
A) force.
B) mass.
C) both of these
D) neither of these
Light bends when it
A) closely passes a star.
B) closely passes the Moon.
C) both of these
D) neither of these
The operation of a microwave oven makes use of
A) the polar nature of water molecules.
B) flip flopping of polarized molecules.
C) an oscillating electric field.
D) all of the above
E) none of the above
Neglecting air resistance, once a tossed ball leaves your hand
A) no further forces act on it.
B) only the force due to gravity acts on it.
C) inertia becomes the force acting on it.
D) your tossing force remains while the ball goes upward.
E) your tossing force remains until it comes to a stop.
The Lorentz factor, γ,
A) is always greater than 1 for any speed greater than zero.
B) lets the time-dilation equation be expressed t = γ t0.
C) both of these
D) none of these
A coin and a ring roll down an incline at the same time. The one to first reach the
bottom is the
A) ring.
B) coin.
C) both reach the bottom at the same time
The effects of scaling are beneficial to swimmers in a race who are relatively
A) large.
B) small.
C) neither of these
Doubling the thickness (diameter) of a rope will multiply its strength by
A) 1/2.
B) 1.
C) 2.
D) 3.
E) 4.
Which has greater kinetic energy?
A) a car traveling at 30 km/hr
B) a car of half the mass traveling at 60 km/hr
C) both the same
D) need more information
When the nucleus of an atom emits an alpha particle, the atom's atomic number
A) decreases.
B) remains unchanged.
C) increases.
A vertically oriented rocket that is able to sustain a continuous upward velocity of 8
km/s will
A) escape from Earth.
B) be unable to escape Earth.
C) eventually maintain a fixed orbit around Earth.
Knowing that the atomic number of neon is greater than that of helium, at the same
temperature and pressure, how does the speed of sound in helium gas compare to the
speed of sound in neon gas?
A) greater in neon than in helium
B) greater in helium than in neon
C) the same in both gases
D) depends on the frequency of the sound generated
If the Sun collapsed to a black hole, Earth's speed in space would
A) increase.
B) decrease.
C) remain the same.
The electrical force between charges is strongest when the charges are
A) close together.
B) far apart.
C) either of these
D) need more information
Compared to a single lamp connected to a battery, two lamps connected in parallel to
the same battery will carry
A) more current.
B) less current.
C) the same current.
A pendulum clock at high altitudes runs
A) fast.
B) slow.
C) normally as it does at sea level.
The density of a submerged submarine at rest is about the same as the density of
A) a crab.
B) iron.
C) a floating submarine.
D) water.
E) none of the above
During a very cold winter, water pipes sometimes burst due to
A) the ground contracting when colder.
B) water expanding when freezing.
C) water contracting when freezing.
D) thawing producing pressure on the pipes.
E) none of the above
A mixture of cyan and yellow pigments appears
A) orange.
B) green.
C) magenta.
D) blue.
E) blackish-brown.
Which of the following is a vector quantity?
A) area
B) volume
C) mass
D) none of the above
Which of the following are electrically neutral?
A) protons
B) neutrons
C) electrons
D) ions
E) none of the above
If a nitrogen atom and a slightly heavier oxygen atom have equal kinetic energies,
which has the greater average speed?
A) nitrogen
B) oxygen
C) both the same
D) need more information
Cosmic rays originate in the
A) Earth's interior.
B) Earth's upper atmosphere.
C) Sun.
D) cosmos.
E) none of the above
Every equation in physics reminds us of a lesson: we can never change only one thing.
When we change the composition of the atmosphere we likely also change
A) its transparency.
B) its reflectivity.
C) its average temperature.
D) Earth's climate.
E) all of the above
The red laser beam from a helium-neon laser corresponds to a spectral line of
A) helium.
B) neon.
C) both of these
D) neither of these
