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Temperature increases with altitude in the
A) troposphere.
B) thermosphere.
C) mesosphere.
D) all of these
Answer:
Water vapor in the air can condense when the air
A) cools above its dew point temperature.
B) temperature increases.
C) temperature drops below its dew point temperature.
D) none of the above
Answer:
Heat is thermal energy that flows due to
A) molecular speed.
B) calorie imbalance.
C) temperature differences.
Answer:
Suggest an explanation for why aspirin has a sour taste.
A) It is the acidic nature of aspirin that gives rise to its sour taste.
B) The sour flavor is added to help prevent overdosing.
C) Aspirin is made sour as a mandated child safety feature.
D) It is the basic nature of aspirin that gives rise to its sour taste.
Answer:
As more lamps are put into a parallel circuit, the overall current in the power source
A) increases.
B) decreases.
C) remains the same.
Answer:
A heavy block at rest is suspended by a vertical rope. When the block is accelerated
upward by the rope, the rope tension
A) is less than its weight.
B) equals its weight.
C) is greater than its weight.
Answer:
What is the main characteristic of a strong acid?
A) It is completely dissociated in water.
B) It readily gives up its proton to a base.
C) It is corrosive.
D) It will damage your skin.
E) all of the above
Answer:
A 1-kg chunk of putty moving at 1 m/s collides and sticks to a 5-kg bowling ball that is
initially at rest in space. The bowling ball and putty are then set in motion with a speed
of
A) 1/4 m/s.
B) 1/5 m/s.
C) 1/6 m/s.
D) none of the above
E) not enough information
Answer:
Water from streams in northern Utah flow to
A) the Atlantic Ocean.
B) the Gulf of Mexico.
C) the Pacific Ocean.
D) Colorado.
Answer:
The temperature at which water freezes is the same as the temperature at which
A) ice melts.
B) water boils.
C) both of these
D) neither of these
Answer:
Just after an alpha particle leaves the nucleus, would you expect it to speed up? Why?
A) No. Once the alpha particle leaves the nucleus it is slowed by the repulsion of the
next closest atom's nucleus.
B) No. As the alpha particle leaves the nucleus it is slowed by the constant attraction of
the electrons surrounding the nucleus.
C) Yes. Once the alpha particle leaves the nucleus there are no more forces acting on it
and it therefore accelerates.
D) Yes. Once the alpha particle leaves the nucleus it accelerates because of mutual
electric repulsion with the nucleus from which it escaped.
Answer:
What is a reduction?
A) the gain of electrons
B) the reduction of the number of electrons
C) the loss of an electron from the valence shell
D) the reaction of oxygen with a reductant
E) the formation of red compounds in the presence of an oxidant
Answer:
If you need 10 moles of sucrose, how many liters of a 4.0 molar solution would you
need?
A) 2.5 L
B) 0.25 L
C) 25 L
D) 10. L
E) none of the above
Answer:
The downdraft in a thunderstorm is strengthened as
A) warm moist air sinks in the thunder cell.
B) dry air is drawn into the cloud, raindrops evaporate, and the air chills.
C) cold moist air condenses.
D) precipitation particles grow and fall.
Answer:
Lightning is very common in thunderstorms. Lightning results from
A) an imbalance in energy.
B) a separation of electrical charge within the cloud.
C) air expansion.
D) rising warm updrafts.
Answer:
Which of the following normally warms up faster when heat is applied?
A) water
B) iron
C) glass
D) wood
Answer:
A rock suspended by a weighing scale weighs 3 N when submerged in water and 5 N
out of water. What is the buoyant force on the rock?
A) 8 N
B) 5 N
C) 3 N
D) 2 N
E) none of the above
Answer:
In a sedimentary rock that contains inclusions of metamorphic rock, the inclusions must
be
A) older than the sedimentary rock.
B) younger than the sedimentary rock.
C) on top of the sedimentary rock.
D) below the sedimentary rock.
Answer:
An iron rod becomes magnetic when
A) opposite ions accumulate at each end.
B) its atoms are aligned.
C) the net spins of many internal electrons are aligned.
D) its electrons stop moving and point in the same direction.
Answer:
Why might disposing of a lead-acid battery, nickel-cadmium battery or mercury battery
in a landfill be a bad thing?
A) Cadmium, mercury, and lead are all toxic metals and could leak out of the landfill.
B) Cadmium, mercury, and lead are all very reactive and generate highly unstable
compounds.
C) Cadmium, mercury, and lead are all radioactive and release radiation.
D) all of the above
E) none of the above
Answer:
When a 500-N parachutist opens his chute and experiences 800 N of air resistance, the
net force on him is
A) 300 N downward.
B) 500 N downward.
C) 800 N downward.
D) 300 N upward.
E) 500 N upward.
Answer:
What is the relationship between the light emitted by an atom and the energies of the
electrons in the atom?
A) The larger the atom, the greater the number of electrons and therefore the greater the
frequency of a light.
B) The energies of the electrons of an atom are directly proportional to the wavelength
of light emitted and therefore inversely proportional to the frequency of the light
emitted.
C) The greater the frequency of a photon of light, the greater the energy packed into that
photon.
D) The light emitted by an atom is a function of its nuclear density and its ability to
absorb and reflect various wavelengths of light from the electromagnetic spectrum.
Answer:
A simple machine cannot multiply
A) force.
B) distance.
C) energy.
D) none of the above
Answer:
Which of these is not a form of solar energy?
A) wind energy
B) fossil fuel energy
C) geothermal energy
D) hydroelectric power
Answer:
Which has zero acceleration?
A) an object at rest
B) an object moving at constant velocity
C) an object in mechanical equilibrium
D) all of the above
E) none of the above
Answer:
Half-frozen fruit punch is always sweeter than the same fruit punch completely melted
because
A) the sugar sinks to the bottom.
B) crystallization is a purifying process.
C) the half-frozen fruit punch is warmer.
D) sugar molecules are less soluble in a half-frozen solution.
Answer:
According to Newton, the greater the masses of interacting objects, the
A) less the gravitational force between them.
B) greater the gravitational force between them.
C) greater the force between them by the square of the masses.
D) greater the force between them by the square of the distance.
Answer:
The North Star has very little apparent rotation in the night sky because
A) it lies directly above the Earth's axis of spin.
B) it rotates in the same relative orbit as Earth.
C) its rate of spin directly matches Earth's.
D) the Oort cloud distorts the view of the naked eye.
Answer:
If you keep decreasing the kinetic energy of atoms in a liquid, the liquid may
A) melt.
B) condense.
C) solidify.
Answer:
A dolphin perceives its environment by the sense of
A) sight.
B) sound.
C) both of these
D) none of the above
Answer:
How much buoyant force acts on a 10-ton ship floating in a fresh-water lake?
A) less than 10 tons
B) 10 tons
C) more than 10 tons
D) not enough information
Answer:
What is the difference between a dipole-dipole interaction and an ion-dipole
interaction?
A) one involves dipole attraction between neutral molecules while the other involves
dipole interactions with ions
B) one involves hydrogen bonding while the other does not
C) one involves salts and water while the other doesn't involve water
D) one involves ionic molecules interacting with other ionic molecules while the other
deals with polar molecules
E) none of the above
Answer:
Sound energy that is not reflected is
A) transmitted.
B) absorbed.
C) either or both of these
Answer:
The oxidation of iron to rust is a problem structural engineers need to be concerned
about, but the oxidation of aluminum to aluminum oxide is not so much of a problem.
Why?
A) Since aluminum is so light and inexpensive, it is easily replaced when corroded.
B) Aluminum oxide is insoluble in water and thus forms a protective coating that
prevents continued oxidation of the aluminum.
C) Aluminum oxide is even stronger than aluminum.
D) The oxidation of aluminum is a very slow reaction, taking hundreds of years before
any structural changes are noticed.
Answer:
