A large block of wood and a smaller block of iron on weighing scales both register 1
ton. Taking buoyancy of air into account, which has the greater mass?
A) wood
B) iron
C) both have the same mass.
D) need more information
What is the frequency of an electromagnetic wave that has a wavelength of 300,000
km?
A) less than 1 Hz
B) 1 Hz
C) more than 1 Hz
When you and your snowboard are in motion, which of the following can be zero?
A) momentum
B) kinetic energy
C) mass
D) inertia
E) none of the above
A hot dog pants
A) to enable evaporation in its mouth and bronchial tract.
B) to provide more oxygen into its lungs.
C) to impress dogs of the opposite sex.
D) none of the above
How many octaves exist between 20 hertz and 2560 hertz?
A) 5
B) 6
C) 7
D) 8
E) 9
Which involves a larger number of calories?
A) the condensation of 1 gram of steam at 100oC to water at 100oC
B) the cooling of 1 gram of water at 100 degrees Celsius to 1 gram of ice at absolute
zero
C) both the same
D) none of these
A volume of air that is compressed with no heat entering or leaving becomes
A) cooler.
B) remain unchanged.
C) warmer.
D) none of the above
The force of friction on a sliding object is 10 N. The applied force needed to maintain a
constant velocity is
A) more than 10 N.
B) less than 10 N.
C) 10 N.
If a volume of air is warmed, it expands and tends to
A) warm.
B) cool.
C) neither of these
When a colored light in air shines on water and is refracted, its wavelength
A) shortens.
B) remains unchanged.
C) lengthens.
A ball is thrown vertically into the air. Because of air resistance, its speed when it
returns to its starting level compared with its initial speed is
A) less.
B) the same.
C) more.
Approximately how much air is in a column 1-cm2 in cross section that extends from
sea level to the top of the atmosphere?
A) 1 gram
B) 1 kg
C) 10 kg
D) 100 kg
Light shines on a pane of green glass and a pane of clear glass. The temperature will be
higher in the
A) clear glass.
B) green glass.
C) both the same
When a rainbow is seen as a complete circle from an airplane, the airplane’s shadow is
A) in the center of the rainbow.
B) in the lower part of the rainbow.
C) in the upper part of the rainbow.
D) totally outside the rainbow.
E) nowhere, for there is no shadow.
When an electron drops from a higher energy level to a lower one, energy is emitted. In
comparison, how much energy is required to reverse the process, going from the lower
level to the higher level?
A) less energy
B) the same energy
C) more energy
A projectile is launched vertically upward at 50 m/s. If air resistance is negligible, its
speed upon returning to its starting point is
A) less than 50 m/s.
B) 50 m/s.
C) more than 50 m/s.
When Nellie Newton hangs at rest in the middle of a clothesline, the tension will not be
the same in each side of the rope when
A) the lengths of rope on each side are different.
B) the angles at each side of the rope are unequal.
C) she is in equilibrium.
D) none of the above
A sack of potatoes weighing 200 N falls from an airplane. As the velocity of fall
increases, air resistance also increases. When air resistance equals 200 N, the sack’s
acceleration becomes
A) 0 m/s2.
B) 5 m/s2.
C) 10 m/s2.
D) infinite.
E) none of the above
Substances absorb heat energy by the process of
A) conduction.
B) convection.
C) radiation.
D) all of the above
An electron and a proton
A) attract each other.
B) repel each other.
C) neither attract nor repel each other.
When Rutherford directed a stream of alpha particles at a gold foil, most particles
A) bounced back.
B) continued through.
C) stopped.
D) spiraled.
Which device is used primarily to detect nuclear radiation?
A) synchrotron
B) linear accelerator
C) cyclotron
D) scintillation counter
E) none of the above
A force that determines the chemical properties of an atom is
A) a friction force.
B) a nuclear force.
C) a gravitational force.
D) an electrical force.
E) none of the above
According to the principle of complementarity, wavelike and particle-like properties of
light
A) only slightly contradict each other.
B) very much contradict each other.
C) make up a wholeness that better describes nature.
D) none of the above
A sample of highly-radioactive material is somewhat
A) warmer than the environment.
B) cooler than the environment.
C) neither of these
The gravitational field simulated by rotation in a space habitat that is best suited for
humans is
A) zero.
B) g.
C) one-quarter g.
D) one-half g.
E) three-quarters g.
Centripetal force does no work on a circularly-moving object because
A) no change in energy occurs.
B) rotational energy transfers to kinetic energy.
C) centripetal force has no component in the direction of motion.
D) none of the above.
Two objects move toward each other due to gravity. As the objects get closer and closer,
the force between them
A) increases.
B) decreases.
C) remains constant.
Burl and Paul paint signs together on a scaffold. Compared to their weights plus the
weight of the scaffold, the sum of tensions in the supporting ropes is
A) less.
B) the same.
C) greater.
D) zero.
A certain transformer doubles input voltage. If the primary coil draws 10 A of current,
then the current in the secondary coil is
A) 2 A.
B) 5 A.
C) 10 A.
D) 25 A.
E) none of the above
A scale from which a rock is suspended reads 5 N when the rock is out of water and 3 N
when the rock is submerged. Buoyant force on the rock is
A) 2 N.
B) 3 N.
C) 4 N.
D) 5 N.
A girl standing on the ground observes a rocket ship move past her at half the speed of
light. Compared to the rocket’s length at rest, she sees the rocket’s length as
A) longer.
B) shorter.
C) the same length.