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Surface tension of liquids
A) increases when wetting agents are added.
B) decreases as the liquid temperature increases.
C) is about the same for all liquids.
D) results from a thin molecular membrane beneath the liquid surface.
E) keeps steel ships afloat.
The part of the visible spectrum most absorbed by water is
A) infrared.
B) red.
C) cyan.
D) all about equally.
Insulating materials are composed of atoms with
A) weak cohesive forces.
B) tightly bound outer electrons.
C) excess protons.
D) vastly more charge than conductors.
A solitary boy cannot balance on a seesaw with its fulcrum at its midpoint. If the
fulcrum is moved to one-quarter the distance from the boy, balance is achieved when
the weight of the boy is
A) less than the weight of the seesaw.
B) equal to the weight of the seesaw.
C) more than the weight of the seesaw.
D) need more information
The sensation of color is seen when light falls on the eye's
A) rods.
B) cones.
C) both of these
D) neither of these
Compared to the primary voltage, the secondary voltage can be
A) higher.
B) lower.
C) the same.
D) any of the above
E) none of the above
The thing that "waves" in the Schrdinger equation is a
A) particle's position.
B) particle's momentum.
C) wave function.
D) all of the above
E) none of the above
The compressions and rarefactions in a longitudinal wave travel in
A) the same direction.
B) opposite directions.
C) a vacuum.
To say that an object becomes electrically polarized means that
A) it is electrically charged.
B) its charges have been rearranged.
C) its internal electric field is zero.
D) it is only partially conducting.
E) none of the above
Figure E-2
A pendulum bob swings to and fro as shown in the sketch. The kinetic energy of the
bob
1) is maximum at position A,
2) is maximum at position B,
3) is the same at all positions,
and the potential energy is maximum at position
4) A.
5) B.
6) is the same at all positions.
Long ago a runaway greenhouse effect transformed the planet
A) Mercury.
B) Venus.
C) Mars.
D) all of the above
Which has more skin compared to its body weight?
A) an elephant
B) a mouse
C) both the same
In the atoms of most materials the fields of individual electrons
A) cancel one another.
B) partly align.
C) completely align.
A mountain that floats on the mantle indicates that the density of the mantle is
A) less than that of the mountain.
B) about the same as that of the mountain.
C) greater than that of the mountain.
D) none of the above
If a nitrogen atom and a slightly heavier oxygen atom have equal average speeds, which
has the greater kinetic energy?
A) nitrogen
B) oxygen
C) both the same
D) need more information
The force a magnetic field exerts on a current-carrying wire is maximum when the wire
is oriented
A) parallel to the magnetic field.
B) perpendicular to the magnetic field.
C) either of these
D) neither of these
A parcel of warmed air rises due to
A) random molecular motion.
B) radiation.
C) buoyancy.
D) increased energy of its molecules.
Strictly speaking, to say that an apple is red means that
A) an apple is red.
B) it appears red.
C) is, or appears makes no difference"red is red.
The ratio of a photon's energy to its frequency is
A) its speed.
B) its wavelength.
C) its amplitude.
D) Planck's constant.
E) none of the above
Light travels slower in a lens having a
A) high index of refraction.
B) low index of refraction.
C) same in each
The primary of a transformer is the coil connected to
A) the load.
B) the Internet.
C) the input power line.
D) none of the above
Systems alone tend to move toward
A) order.
B) disorder.
C) temperature inversions.
D) none of the above
The physics underlying photovoltaic solar cells is
A) electron diffraction.
B) photon capture.
C) the photoelectric effect.
D) none of the above
You can safely hold your fingers on both sides of a candle flame due mainly to
A) conduction.
B) convection.
C) radiation.
D) none of the above
What color is fully transmitted in common window glass?
A) red
B) yellow
C) green
D) blue
E) all of the above
Your vision is sharpest when your pupil is
A) dilated.
B) constricted.
C) same either way
Dr. Chuck projects a ball horizontally from a lab bench. The ball lands on a bullseye
marked on the floor a horizontal distance equal to the ball's initial speed
A) multiplied by its time in the air.
B) coupled with its speed of fall.
C) squared plus its downward speed squared when hitting the floor.
D) all of the above
E) none of the above
A 2-kg ball is held 4 m above the ground. Relative to the ground its potential energy is
A) 6 J.
B) 8 J.
C) 32 J.
D) 80 J.
E) more than 80 J.
Sometimes the current in lamps is too feeble to produce glowing of the lamp filaments,
which occurs when
A) too many lamps are connected in series.
B) too many lamps are connected in parallel.
C) too much current is drawn by the battery.
A 500-N parachutist opens his chute and experiences an air resistance force of 800 N.
The net force on the parachutist is then
A) 300 N downward.
B) 500 N downward.
C) 800 N downward.
D) 300 N upward.
E) 500 N upward.
The fact that light travels only at 300,000 km/s in free space is a consequence of
A) electromagnetic wave propagation.
B) electromagnetic field induction.
C) Maxwell's laws.
D) energy conservation.
E) none of the above
When carbon and oxygen atoms combine, energy is
A) absorbed by the reaction.
B) released by the reaction.
C) not involved.
