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Like Jupiter and Saturn, Neptune emits about 2.5 times as much heat energy as it
receives from the Sun, although calculations show it should have already lost all of its
original heat. What is the most likely explanation?
A) Unlike Uranus, it is still contracting.
B) Radioactive decay has kicked into overdrive, with runaway reactions taking place.
C) The basis for these calculations is currently being questioned by a new generation of
scientists.
D) There are gravitational anomalies taking place, which may hold some clue as to
where the heat may be coming from.
E) Uranus' gravity is creating a "slingshot" effect, catapulting solar winds into
Neptune's atmosphere in the form of as of yet undetected radiation.
Answer:
As the hydronium ion concentration increases, the pH
A) goes down.
B) gets larger.
C) starts to affect the OH- concentration.
D) starts to alter the chemical properties of the water molecules.
E) stays constant.
Answer:
Standing waves of sound are employed in a
A) guitar.
B) flute.
C) clarinet.
D) all of the above
E) none of the above
Answer:
A truly educated person is knowledgeable about
A) science.
B) the arts.
C) religion.
D) all of the above
Answer:
Phosphate ions, 3-, were once added to detergents to assist in cleaning. What
function did they serve?
A) Phosphate ions were relatively good at removing grease by binding with large
nonpolar molecules.
B) Phosphate ions were large enough to bind with the large grime molecules and
remove them.
C) Phosphate ions would bind to and remove calcium ions, thus acting as a water
softening agent.
D) Phosphate ions would reduce the growth of algae in aquatic habitats receiving the
wastewater.
Answer:
A 1-kg glider and a 2-kg glider both slide toward each other at 1 m/s on an air track.
When they collide and stick, the combined-glider speed is
A) 0 m/s.
B) 1/2 m/s.
C) 1/3 m/s.
D) 1/6 m/s.
E) 1.5 m/s.
Answer:
Thrust a magnet into a coil of wire and you'll induce
A) voltage.
B) current.
C) both of these
D) none of the above
Answer:
Arnold Strongman wearing socks and Suzie Small in gym shoes have a tug-of-war on a
polished floor. The likely winner is
A) Arnold.
B) Suzie.
C) neither, a tied score
D) no basis for predicting
Answer:
Tectonic plates are composed of the
A) crust and mantle.
B) lithosphere.
C) lithosphere and the asthenosphere.
D) crust.
Answer:
An object that has twice as much mass as another object also has twice as much
A) inertia.
B) velocity.
C) gravitational acceleration.
D) volume.
E) all of the above
Answer:
The operation of a bimetallic strip relies on differences in
A) expansions of metals.
B) conductivities of metals.
C) heat capacities of metals.
Answer:
A cat and a mouse run along a road with the same kinetic energy. The faster runner is
the
A) cat.
B) mouse.
C) both run at the same speed
D) not enough information
Answer:
How can you tell whether a sugar solution is saturated or not?
A) Add more sugar, if it dissolves, it is saturated.
B) There will be a precipitate if the water is heated.
C) Cool the solution to see if there is a precipitate.
D) As long as there are more water molecules than sugar molecules, there is a saturated
solution.
Answer:
Which of the following species is the oxidizing agent?
2 CuBr → 2Cu + Br2
A) Cu
B) CuBr
C) Cu+
D) Br-
E) Br2
Answer:
An iron ball is placed in a pie pan that floats in a bucket. The water level is marked at
the side of the bucket. Then the iron ball is removed and allowed to sink in the bucket.
The water line at the side of the bucket is
A) lower.
B) the same.
C) higher.
Answer:
A softball player determines her pitching speed by throwing a ball horizontally from an
elevation of 5 m above the ground. The ball lands 20 m downrange. What is her
pitching speed?
A) 5 m/s
B) 10 m/s
C) 20 m/s
D) 25 m/s
E) none of the above
Answer:
Object and image for a plane mirror lie
A) along the same plane.
B) equal distances from the mirror.
C) at right angles to each other.
D) all of the above
E) none of the above
Answer:
Rocks with a high water content have a
A) higher melting point.
B) lower melting point.
C) higher pressure.
D) lower pressure.
Answer:
The general direction of a comet's tail is
A) toward the Sun.
B) away from the Sun.
C) behind the comet's direction of motion.
Answer:
Many of the world's larger deserts are the result of
A) warm ocean currents.
B) extremely high temperatures.
C) strong prevailing northwesterly winds.
D) belts of high atmospheric pressure.
Answer:
Electromagnetic induction occurs in a coil when there is a change in
A) electric field intensity.
B) magnetic field intensity.
C) voltage.
D) the coil's polarity.
E) none of the above
Answer:
The part of the electromagnetic spectrum most absorbed by water is
A) infrared.
B) lower frequencies of visible light.
C) middle frequencies of visible light.
D) higher frequencies of visible light.
E) all of the above
Answer:
A 5-kg fish swimming at a speed of 1 m/s swallows an absent-minded 1-kg fish at rest.
The speed of the larger fish after lunch is
A) 1/2 m/s.
B) 2/5 m/s.
C) 5/6 m/s.
D) 6/5 m/s.
E) 1 m/s.
Answer:
A galvanometer is a useful device in electric
A) electromagnets.
B) transformers.
C) generators and motors.
D) meters.
E) none of the above
Answer:
When you ride your scooter you have momentum. When you ride twice as fast you
have
A) almost twice the momentum.
B) twice the momentum.
C) four times the momentum.
D) none of the above
Answer:
Airplane flight best illustrates
A) Archimedes' principle.
B) Pascal's principle.
C) Bernoulli's principle.
D) Boyle's law.
Answer:
Ozone in the Earth's upper atmosphere
A) filters incoming infrared light reaching Earth's surface.
B) filters incoming visible light reaching Earth's surface.
C) filters incoming ultraviolet radiation reaching Earth's surface.
D) acts as a blanket to keep Earth's surface warm.
Answer:
The wind blows in response to
A) pressure differences.
B) Earth's rotation.
C) temperature differences.
D) pressure and temperature differences.
E) none of these
Answer:
When food is irradiated with gamma rays from a cobalt-60 source, does the food
become radioactive? Why?
A) Yes. This is why irradiation with cobalt-60 is no longer approved by the FDA.
B) Yes. However, the radioactivity resulting is well below the danger level established
by the FDA.
C) No. The gamma rays do not have sufficient energy to initiate the nuclear reaction in
the atoms of the food.
D) Yes and No. Although the gamma rays initiate the nuclear reaction the radioactivity
does not show up until the food is ingested.
Answer:
Wegener's theory of continental drift
A) was first considered a monumental breakthrough in science.
B) was not accepted by the scientific community of the early 1900s.
C) proved that heat flows convectively below Earth's surface.
D) has been proved wrong.
Answer:
A melon is tossed straight upward with 100 J of kinetic energy. If air resistance is
negligible the melon will return to its initial level with a kinetic energy of
A) less than 100 J.
B) more than 100 J.
C) 100 J.
D) need more information
Answer:
When a 10-kg block is simultaneously pushed toward the east with 20 N and toward the
west with 15 N, the combination of these forces on the block is
A) 5 N west.
B) 5 N east.
C) 35 N east.
D) 35 N west.
Answer:
