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What are some of the optimistic worldwide changes that may follow the advent of
successful fusion reactors?
A) Economies will be geared to relative abundance rather than scarcity.
B) Humans will have more opportunities to focus on social issues, such as world
hunger.
C) There will be fewer hostilities between nations.
D) all of the above
Answer:
In terms of transferring heat, red-hot wooden coals
A) conduct quite well.
B) conduct poorly.
C) radiate poorly.
D) convect poorly.
Answer:
What chemical change occurs when a wax candle burns?
A) The wax near the flame melts.
B) The molten wax is pulled upwards through the wick.
C) The wax within the wick is heated to about 600C.
D) The heated wax molecules combine with oxygen molecules.
Answer:
Neglecting air resistance, after a ball leaves your hand when you toss it upward, the
force on it
A) gradually decreases until the ball reaches the top of its path.
B) first acts upward and then downward after reaching the top.
C) is only the force due to gravity, always directed downward.
D) none of the above
Answer:
What evidence did Wegener use to support his hypothesis of continental drift?
A) sea-floor spreading
B) paleoclimatic data
C) polar reversals
D) transform fault boundaries
Answer:
Once a basketball player's feet are off the floor in making a jump, the jumper's
acceleration
A) depends on launch speed.
B) is usually greater for taller players.
C) varies with body orientation.
D) is g; no more, no less.
E) all of the above
Answer:
Compared to your weight on Earth, your weight on Jupiter would be about
A) 2 times.
B) 3 times.
C) 100 times.
D) 300 times.
E) 3000 times.
Answer:
Sound refraction depends on the speed of sound being
A) constant.
B) variable.
C) proportional to frequency.
D) inversely proportional to wavelength.
E) none of the above
Answer:
A liter-sized block of wood floats in water. The volume of water displaced is
A) less than 1 L.
B) 1 L.
C) greater than 1 L.
D) none of the above
Answer:
When work is done by a system and no heat is added, the temperature of the system
A) increases.
B) decreases.
C) remains unchanged.
Answer:
A wave travels an average distance of 6 m in 1 s. What is the wave's average velocity?
A) less than 0.2 m/s
B) 1 m/s
C) 3 m/s
D) 6 m/s
E) more than 6 m/s
Answer:
Your weight is defined to be the force
A) due to gravity only.
B) you exert against a supporting surface.
C) equal to your normal force on any surface.
Answer:
If evaporation exceeds precipitation, the salinity of the ocean in that area
A) decreases.
B) stays the same.
C) gets denser.
D) increases.
Answer:
Air that flows southward from the horse latitudes in the Northern Hemisphere produces
the
A) Gulf Stream.
B) trade winds.
C) westerlies.
D) Kuroshio current.
Answer:
Pluto is found within the
A) Oort cloud.
B) Kuiper belt.
C) asteroid belt.
D) orbit of Neptune.
Answer:
A spinning tossed baseball veers off course in the direction of
A) crowded streamlines.
B) non-crowded streamlines.
C) onward-coming streamlines.
Answer:
Aluminum metal undergoes the same basic corrosion process that iron does yet it does
not decompose as rapidly. Why?
A) The aluminum oxide does not flake off like rust and acts as a protective layer.
B) Aluminum is harder to oxidize than iron.
C) Aluminum is harder to reduce than iron.
D) The aluminum oxide product undergoes a reduction to produce aluminum metal.
E) The aluminum is galvanized, which prevents oxidation.
Answer:
A hydraulic jack is used to lift an automobile. If the input force is 200 N over a distance
of 1 meter, the output force over a distance of 0.1 meter is ideally
A) 200 N.
B) 500 N.
C) 1000 N.
D) 2000 N.
E) none of the above
Answer:
Which of the following intermolecular forces best describes why molecules like
CF3CF3 are soluble in liquid CO2?
A) dipole-dipole
B) induced dipole-induced dipole
C) dipole-induced dipole
D) ion-dipole
E) hydrogen bonding
Answer:
The colors dispersed by a prism are due to different light
A) speeds inside the prism.
B) directions inside the prism.
C) energies inside the prism.
D) none of the above
Answer:
What is the molarity when water is added to 2 moles of sodium chloride to make 0.5
liter of solution?
A) 8 M
B) 4 M
C) 5 M
D) 2.5 M
Answer:
A ball is projected into the air with 900 J of kinetic energy that is transformed to
potential energy at the top of its trajectory. When it returns to its original level after
encountering air resistance, its kinetic energy is
A) less than 900 J.
B) more than 900 J.
C) 900 J.
D) not enough information
Answer:
Electromagnetic waves consist of
A) compressions and rarefactions of electromagnetic pulses.
B) oscillating electric and magnetic fields.
C) particles of light energy.
D) high-frequency sound waves.
Answer:
The phosphoric acid salt of caffeine has the structure:
This molecule behaves as an acid in that it can donate a hydrogen ion, created from the
hydrogen atom bonded to the positively charged nitrogen atom. What salt is formed
when 1 mole of this salt reacts with 1 mole of sodium hydroxide, NaOH, a strong base?
A) Salts can't react to form salts, rather they only arise from the reaction of an acid and
a base.
B) P -
C) HP
D) P
Answer:
The source of Earth's internal energy involves
A) kinetic energy.
B) potential energy.
C) radioactivity.
D) the Sun.
Answer:
A ball rolling down an incline has its maximum potential energy at
A) the top.
B) a quarter of the way down.
C) half-way down.
D) the bottom.
Answer:
In a swell, wavelength is constant. As a swell nears the shore and touches bottom, the
wavelength
A) shortens, wave speed slows, and wave height increases.
B) shortens, wave speed slows, and wave height decreases.
C) and wave height increase as wave speed slows.
D) and wave height increase as wave speed quickens.
Answer:
Which of the following ethers has the highest boiling point?
A) CH3OCH3
B) CH3CH2OCH2CH3
C) CH3CH2CH2OCH2CH2CH3
D) CH3CH2CH2CH2OCH2CH2CH2CH3
Answer:
Magnetic field lines about a current-carrying wire
A) extend radially from the wire.
B) circle the wire in closed loops.
C) both of these
D) none of the above
Answer:
The acceleration of a vertically-thrown ball at the top of its path is
A) zero.
B) 10 m/s2.
C) between zero and 10 m/s2.
D) dependent on the mass of the ball.
Answer:
Which of the following is not a transverse wave?
A) sound
B) light
C) radio
D) all of the above
E) none of the above
Answer:
If the solubility of a compound is 30 grams per liter, how much solid is left undissolved
if you mix 30 g of the compound in 0.33 L of solution?
A) 20 g
B) 10 g
C) 0 g
D) 30 g
E) 33 g
Answer:
Your friend says that any radio wave travels appreciably faster than any sound wave.
A) agree with your friend unconditionally
B) agree with your friend for most common cases
C) disagree with your friend
D) find a new friend
Answer:
Ultrasonic sound that travels at 1530 m/s in ocean water is bounced off the ocean floor
and returns to the ship above. If the round trip takes 3 s, the depth of the water is
A) 1530 m.
B) 2295 m.
C) 3060 m.
D) 4590 m.
Answer:
A common car engine is 20% efficient. When cruising, the car encounters an average
retarding force of 1000 N. If the energy content of gasoline is 40 MJ/L, how many
kilometers per liter does the car achieve?
A) 14 km/L
B) 12 km/L
C) 10 km/L
D) 8 km/L
E) none of the above
Answer:
