The Moon’s reflected image in a lake often appears as a vertical column when the water
is
A) perfectly still.
B) slightly rough.
C) very rough, churning with waves.
Answer:
Consider a gun with a pellet that is more massive than the gun. The firing speed is
greater for the
A) pellet.
B) recoiling gun.
C) both are the same
D) none of the above
Answer:
A student is told to use 20.0 grams of sodium chloride to make an aqueous solution that
has a concentration of 10.0 grams of sodium chloride per liter of solution. Assuming
that 20.0 grams of sodium chloride has a volume of 7.5 milliliters, about how much
water will she use in making this solution?
A) 9.25 L
B) 9.5 L
C) 9.9925 L
D) 10 L
Answer:
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 is
A) 0 m/s2.
B) 5 m/s2.
C) 10 m/s2.
D) infinite.
E) none of the above
Answer:
The current produced by a common generator is
A) dc.
B) ac.
C) neither of these
Answer:
Where groundwater discharges to a swamp, the elevation of the water table next to the
swamp is
A) lower than the surface of the swamp.
B) at the same elevation as the surface of the swamp.
C) slightly higher than the surface of the swamp.
D) Not enough information is given.
Answer:
What is the main characteristic of a strong base?
A) It is completely dissociated in water.
B) It readily accepts an acidic proton.
C) It is corrosive.
D) It will damage your skin.
E) all of the above
Answer:
Some products on the market today involving nanotechnology include
A) cars.
B) elevators.
C) sunscreen.
D) cosmetics.
E) all of the above
Answer:
The lift experienced by Maglev trains is due to magnetic
A) attraction.
B) repulsion.
C) dipoles.
Answer:
How can a half-life be used to tell the age of a sample?
A) The half-life of an isotope is constant.
B) The amount of radioactive form depends on the amount of radiation in the
surroundings.
C) The ratio between the radioactive form and the stable form depends on the
archaeological record.
D) The ratio between the radioactive form and stable form varies regularly with time.
E) both C and D
Answer:
Unlike electric charges, magnetic poles cannot be
A) located.
B) isolated.
C) destroyed.
Answer:
A coulomb of charge passing through a 6-V battery acquires
A) 6 joules.
B) 6 amperes.
C) 6 ohms.
D) 6 watts.
E) 6 newtons.
Answer:
The outer core is liquid because
A) it is magnetically charged, and, like a magnet, energy flows from one region to
another.
B) the inner core is solid.
C) there is less weight, and thus less pressure on it.
D) it is composed of molten iron.
Answer:
A column of contained air extends from sea level to the top of the atmosphere. The
contained air has mass. If the column instead contained the same mass of water, its
height would be
A) 1/13.6 times as high as the atmosphere.
B) about 3/4 m high.
C) 10.3 m high.
D) about 5.6 km high.
Answer:
Along the open ocean, barrier islands are zones of
A) relatively quiet waters.
B) deposited sand ridges formed offshore and parallel to the coast.
C) intense vegetation growth.
D) eroded sand ridges.
Answer:
Which of the following molecules has the highest boiling point?
A) BH3
B) NH3
C) CH4
D) All of the above should have the same boiling point.
Answer:
Many dry cereals are fortified with iron, which is added to the cereal in the form of
small iron particles. How might these particles be separated from the cereal?
A) add water and the iron particles will float to the top
B) blend the cereal to a fine consistency and pass through a filter
C) collect the iron filings with a magnet
D) heat the cereal so that the iron particles melt and thereby coalesce
Answer:
Sand dunes form
A) where air flows freely over sand.
B) from wind that is increasing in speed.
C) as wind moves sand from the back to the front of the dune.
D) as wind stops blowing.
Answer:
An important feature of red sunsets is the
A) scattering of lower frequencies by larger particles in the air.
B) longer path of air through which sunlight travels.
C) lower frequencies of light emitted late in the day by the Sun.
D) absorption effects of the smaller particles in the air.
Answer:
Regional metamorphic rocks are distinguished from igneous rocks because
A) they are finer grained.
B) regionally metamorphosed rocks are foliated and igneous rocks are not.
C) igneous rocks have interlocking grains and metamorphic rocks do not.
D) metamorphic rocks often have a “baked zone” and igneous rocks do not.
Answer:
When stress exceeds a rock’s elastic limit, the rock
A) permanently loses its original form.
B) can either break or flow.
C) becomes plastic.
D) can lose its original form and either break or flow.
Answer:
Consider light energy that is momentarily absorbed in glass and then reemitted.
Relative to the absorbed light, the frequency of the reemitted light is
A) less.
B) the same.
C) more.
Answer:
Which of the following would be an ion with a double positive charge?
A) an Mg atom that gains two electrons
B) an Mg atom that gains one electron
C) an Mg atom that loses two electrons
D) an Mg atom that loses one electron
E) none of the above
Answer:
Minimal orbit speed about Earth is about 8 km/s. Minimal orbital speed for a satellite
about the Moon would be
A) less than 8 km/s.
B) greater than 8 km/s.
C) about 8 km/s.
Answer:
Diffuse reflection occurs when the size of surface irregularities is
A) small compared to the wavelength of the light used.
B) large compared to the wavelength of the light used.
C) either
Answer:
Which of the following sources of radiation provides most of our yearly exposure?
A) background radiation
B) smoke detectors
C) living near nuclear power plants
D) televisions (cathode ray tubes)
E) dental and medical X-rays
Answer:
Which of the following materials is most likely to undergo reduction?
A) Na
B) Na+
C) Cl2
D) Cl–
E) both A and B
Answer:
What constitutes over half of Jupiter’s volume?
A) oceans of liquid hydrogen
B) oceans of liquid methane
C) its rocky solid core
D) the massive Mons Majora Range
Answer:
Efforts to curb climate change need to be done on a global scale. There is no “one-size
fits all”, but efforts must include
A) education, mitigationpreventative measures of reducing CO2 and the shift to cleaner
energy sources, and adaptationreducing society’s vulnerability to climate change.
B) more data and research to see if global warming is a real threat.
C) global government cooperation to understand the impacts of global warming.
D) increased reliance on solar energy coupled with terrestrial radiation.
Answer:
Which of the following statements about fusion is true?
A) Fusion reactions have no critical-mass requirement.
B) Fusion is easier than fission.
C) Fusion reactions can be easily controlled to make energy.
D) Fusion produces no harmful radiation.
E) none of the above
Answer:
To change 50 g of boiling water to steam requires
A) 50 calories.
B) 500 calories
C) 540 calories.
D) more calories than is required to bring 50 g of ice at absolute zero to the boiling
point.
E) none of the above
Answer: