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A Doppler effect occurs when a source of sound moves
A) toward you.
B) away from you.
C) either of these
D) none of the above
Answer:
Einstein theories tell us that the speed of light
A) depends on one's frame of reference.
B) is constant in all frames of reference.
C) provides accurate clocks.
D) slows in a transparent medium.
Answer:
What needs to be done to convert a neutral nitrogen atom into an N-3 species?
A) add three electrons
B) remove three electrons
C) remove three protons
D) add three protons
E) add three nitrogens
Answer:
Materials composed of molecules that absorb large amounts of energy in the form of
vibrations and rotations have
A) low specific heat capacities.
B) high specific heat capacities.
C) none of the above
Answer:
The Earth's temperature increases with depth. Pressure also increases with depth from
the weight of the rock above. As pressure increases the
A) rock above begins to melt.
B) melting point of the rock (at depth) decreases.
C) melting point of the rock (at depth) also increases.
D) temperature increases, rocks begin to melt.
Answer:
In a gaseous mixture of hydrogen and oxygen, the molecules having the greater average
kinetic energy are
A) hydrogen.
B) oxygen.
C) both the same
D) not enough information
Answer:
When you push a crate across a level floor at constant velocity, friction between the
crate and the floor is
A) less than your pushing force.
B) the same amount as your pushing force.
C) more than your pushing force.
D) none of the above
Answer:
Two people, one twice as massive as the other, attempt a tug-of-war with 12 m of rope
on frictionless ice. After a brief time, they meet. The heavier person slides a distance of
A) 3 m.
B) 4 m.
C) 5 m.
D) 6 m.
Answer:
Ultrasonic sound waves have relatively
A) low frequencies.
B) long wavelengths.
C) both of these
D) none of the above
Answer:
If you remove two protons and two neutrons from a gold atom (Au), what new element
is formed?
A) Ir
B) Au
C) Re
D) Au-2
E) Tl
Answer:
An object in a vacuum has no
A) buoyant force.
B) mass.
C) weight.
D) temperature.
E) all of the above
Answer:
To predict the approximate energy release of either a fission or a fusion reaction,
explain how a physicist uses a table of nuclear masses and the equation E = m .
A) find the change in mass and divided by the speed of light squared
B) find the change in mass and multiply by the speed of light squared
C) find the change in mass, square it, and multiply by the speed of light
D) take the square root of the change in mass and multiply by the speed of light
Answer:
Rocks can begin to melt if
A) a decrease in pressure results in a sufficient decrease in the rock's melting point.
B) the rock's water content increases thereby decreasing the rock's melting point.
C) heated by rising magma from the Earth's interior.
D) all of the above.
E) none of the above.
Answer:
Which of the following has the greatest number of particles?
A) 1 mole of Na
B) 22.990 g of Na
C) 1 mole of Be
D) 9.012 g of Be
E) All are the same.
Answer:
Air is considered unstable when it
A) continues to rise because it is warmer than surrounding air.
B) behaves unpredictably.
C) warms as it descends.
D) cools as it rises.
Answer:
As the number of loops in a current-carrying wire coil is increased, the magnetic field
becomes
A) more spread out.
B) more stable.
C) stronger.
D) weaker.
E) none of the above
Answer:
Ancient geologic processes as revealed in Paleozoic rock layers were
A) predominantly volcanic in origin.
B) primarily glacial.
C) predominantly processes of erosion and sedimentation.
D) very similar to processes seen today.
Answer:
Warm air rises and cools as it expands. Warm air will continue to rise as long as it is
A) denser than the surrounding air.
B) warmer and less dense than the surrounding air.
C) warmer and less dense than the air above.
D) snowing.
Answer:
Carbonate deposition occurs in environments that are
A) warm and humid.
B) cool and wet.
C) monsoonal.
D) dry as deserts.
Answer:
Fast moving, turbulent streams are highly erosive, they can
A) carry large sediment particles and a large volume of sediment.
B) meander and flood into deltas.
C) deposit only fine silts and muds.
D) form U-shaped valleys from gullies.
Answer:
More disorder means
A) greater entropy.
B) no particular change in entropy.
C) less entropy.
Answer:
Compared to a clock at the bottom of a very tall skyscraper, a clock at the top of this
skyscraper will appear to run
A) slower.
B) faster.
C) the same.
Answer:
Atmospheric pressure is caused by the
A) density of the atmosphere.
B) weight of the atmosphere.
C) temperature of the atmosphere.
D) effect of the Sun's energy on the atmosphere.
Answer:
Which object has zero acceleration?
A) one at rest
B) one moving at constant velocity
C) one in mechanical equilibrium
D) all of the above
E) none of the above
Answer:
If Earth is closest to the Sun in January, why is much of the Northern Hemisphere cold
in January?
A) It is cold because it is winter.
B) The Southern Hemisphere is tilted away from the Sun in January.
C) Solar energy favors the equatorial regions.
D) The Northern Hemisphere is tilted away from the Sun in January.
Answer:
The theory of continental drift is supported by paleoclimate data, paleontology, and
A) paleomagnetic data.
B) seafloor spreading.
C) transform boundaries.
D) the jig-saw fit of the continents at their continental margins.
Answer:
What is the power rating of a device that draws 0.8 A when connected to 120 V?
A) 12 W
B) 15 W
C) 60 W
D) 96 W
E) 120 W
Answer:
If there were no gravity, a ball thrown upward at an angle would follow a straight-line
path. Due to gravity, however, at the end of 2 s it is
A) 5 m below the straight line.
B) 10 m below the straight line.
C) 15 m below the straight line.
D) 20 m below the straight line.
E) more than 20 m below the straight line.
Answer:
Precipitation is produced by
A) a rising air mass.
B) a descending air mass.
C) condensation of water vapor in the air to make clouds and cloud droplets that fall as
liquid water or ice.
D) all of the above
Answer:
Which of the following is a longitudinal wave?
A) sound
B) light
C) radio
D) all of the above
E) none of the above
Answer:
The buoyant force that acts on a 10-ton ship floating in the ocean is
A) less than 10 tons.
B) 10 tons.
C) greater than 10 tons.
D) depends on the density of seawater
Answer:
The direction of vibration for an electron and the plane of polarization of the light it
emits
A) are the same.
B) are at right angles to each other.
C) may or may not be at right angles to each other.
D) are independent of each other.
Answer:
