A music console is pushed 2 m by a force of 20 N. The work done on the console is
A) 2 J.
B) 10 J.
C) 20 J.
D) 40 J.
E) 80 J.
Answer:
The force that accelerates a rocket in outer space is exerted on the rocket by the
A) rocket’s engine.
B) rocket’s wings.
C) atmospheric pressure.
D) exhaust gases.
E) none of the above
Answer:
The amount of potential energy possessed by an elevated object is
A) relative to a chosen reference level.
B) equal to the work done in lifting it.
C) equal to the kinetic energy it will acquire when freely falling to its reference level.
D) all of the above
Answer:
The energy in an earthquake is released
A) all at once.
B) before the quake, after the quake, and during the quake.
C) as an epicenter focus.
D) in unconsolidated rock.
Answer:
A piece of putty moving with 1 unit of momentum strikes and sticks to a heavy bowling
ball initially at rest. After the putty sticks to the ball, both move with a combined
momentum of
A) less than 1 unit.
B) more than 1 unit.
C) 1 unit.
D) not enough information
Answer:
If you had a 1 M solution of a weak acid what would be its pH?
A) 0
B) 6
C) 7
D) 8
E) 13
Answer:
Evaporation of raindrops in the atmosphere
A) warms the air.
B) cools the air.
C) does not happen, raindrops always reach Earth’s surface.
D) is greatest above polar ice caps.
Answer:
Relative to its average speed in air, the average speed of a beam of light in glass is
A) more.
B) the same.
C) less.
Answer:
The tarp covering on a trailer or truck puffs upward for fast-moving vehicles, which
illustrates
A) Pascal’s principle.
B) Archimedes’ principle.
C) the principle of continuity.
D) Bernoulli’s principle.
Answer:
Ammonia, N , is more polar than is borane, B because it
A) has a lone pair of electrons.
B) is less symmetrical than borane.
C) its hydrogens are not exactly opposite one another.
D) all of the above
Answer:
Which of the following reaction energies is the least exothermic (but still an exothermic
reaction)?
A) 540 kJ/mole
B) -540 kJ/mole
C) 125 kJ/mole
D) -125 kJ/mole
E) not enough information given
Answer:
Complete the following nuclear equation:
Bi → Tl + ??
A) e
B) He
C) gamma ray
D) both A and B
E) none of the above
Answer:
What would be the concentration of hydronium ions in a solution that had a pH = -3?
Why would such a solution be impossible to prepare?
A) Concentration of = 3 M. It is impossible because it is hard to measure such a
small amount of hydronium ions accurately.
B) Concentration of = 30 M. It is impossible because pH can not be negative.
C) Concentration of = M. It is impossible because any container used to hold
the acid would immediately corrode.
D) Concentration of = M. It is impossible because only so much acid can
dissolve in water before the solution becomes saturated.
Answer:
What is the main difference between a conceptual model and a physical model?
A) A physical model represents shape and form while a conceptual model describes
behavior.
B) A conceptual model represents shape and form while a physical model describes
behavior.
C) Only physical models can be used to represent the real world.
D) Only conceptual models can be used to depict concepts.
E) Physical models and conceptual models can be used to describe the same things.
Answer:
The air resistance of falling is greatly affected by an object’s frontal area and
A) mass.
B) weight.
C) speed.
Answer:
What happens to the corrosive properties of an acid and a base after they neutralize
each other? Why?
A) The corrosive properties are neutralized because the acid and base no longer exist.
B) The corrosive properties are unaffected because salt is a corrosive agent.
C) The corrosive properties are doubled because the acid and base are combined in the
salt.
D) The corrosive properties remain the same when the salt is mixed into water.
Answer:
A stone is thrown vertically upward. At the top of its vertical path the force acting on it
is
A) zero.
B) only the force due to gravity.
C) due to air resistance.
D) both due to gravity and air resistance.
Answer:
Atoms of metallic elements can form ionic bonds, but they are not very good at forming
covalent bonds. Why?
A) These atoms are too large to be able to come in close contact with other atoms.
B) They have a great tendency to lose electrons.
C) Their valence shells are already filled with electrons.
D) They are on the wrong side of the periodic table.
Answer:
Thermal energy will flow in a direction from cold to hot
A) only with external effort.
B) near absolute zero.
C) never.
D) always.
Answer:
The different outcomes in touching a faulty 120-V light fixture and a high-voltage Van
de Graaff generator have to do with differences in
A) sustainability of charge flow.
B) duration of charge flow.
C) amount of energy transferred.
D) all of the above
E) none of the above
Answer:
What is the first step in treating raw sewage?
A) filtration of solids
B) removal of fine particles by settling
C) removal of grit by settling
D) removal of sludge
E) disinfection
Answer:
The image below shows a beam of radiation passing between two electrically charged
plates.
Which of the following provides the minimum amount of protection you need to block
the following form of radiation?
gamma
A) lead suit
B) suntan lotion
C) thick leather
D) T-shirt
E) none of the above
Answer:
If the primary of a transformer were connected to a dc power source, the transformer
would have a voltage output
A) at a higher efficiency than with an ac source.
B) the same as its input.
C) that is also dc.
D) only briefly while being connected or disconnected.
E) none of the above
Answer:
A 10-kg brick and a 1-kg book are dropped in a vacuum. The force of gravity on the
10-kg brick is
A) the same as the force on the 1-kg book.
B) 5 times as much as the force on the 1-kg book.
C) 10 times as much as the force on the 1-kg book.
D) zero.
Answer:
As a stream flows downslope, if discharge doubles but the cross-sectional area of the
channel stays the same, what happens to the average stream speed?
A) Average stream speed stays the same.
B) Average stream speed decreases.
C) Average stream speed increases.
D) Stream flow stops.
Answer:
A copper ring can be made to levitate about the extended bar of an electromagnet
because the magnetic field induced in the ring
A) remains strong and steady.
B) opposes the field producing it.
C) is attracted to the top end of the bar.
D) none of the above
Answer:
Igneous rock is formed from
A) crystallization of molten magma.
B) high temperatures and pressures.
C) solidified lava beneath the Earth’s surface.
D) any of these
Answer:
Which of the following might best explain the reason why electrons are restricted to
certain energy levels in an atom?
A) They behave like restricted waves and are self-reinforcing.
B) They are travelling at very high speeds.
C) They are interacting with the light around the atom.
D) They are out of phase and self-destruct when outside of distinct energy regions.
E) They behave like chaotic waves of alternating frequency.
Answer:
Why can’t any star, no matter how massive, fuse elements heavier than iron?
A) because the nucleons within iron have the least mass possible
B) because elements heavier than iron have less average mass per nucleon
C) It could happen, we just have not yet observed a star massive enough to do this.
D) Actually, this occurs on a regular basis, which explains the great abundance of heavy
elements.
Answer:
Large icebergs in the Arctic and Antarctic form as
A) frozen seawater thickens.
B) sea ice forms next to continental land.
C) glaciers calve into the sea.
D) alpine glaciers melt in Arctic and Antarctic waters.
Answer:
The metamorphic equivalent of limestone is
A) gneiss.
B) marble.
C) quartzite.
D) schist.
Answer:
In comparison to S-waves, P-waves
A) vibrate the particles of their medium up and down and side-to-side.
B) can travel through solid granite, magma, water and/or air.
C) can travel only through solids, not through fluids.
D) are the second seismic wave to register on a seismograph.
Answer: