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What coefficient is needed in front of the O2 molecule to balance the following
equation?
2 (g) + ________ (g) → 8 (g) + 10 O (l)
A) 8
B) 13
C) 5
D) 1
Answer:
A Starburst galaxy has this name because of its
A) high rate of star formation.
B) high rate of supernovae.
C) large number of pulsars.
D) large number of neutron stars.
Answer:
The image below shows a beam of radiation passing between two electrically charged
plates.
Which of the beams is due to alpha particles?
A) a
B) b
C) c
D) all of the above
E) none of the above
Answer:
What applied horizontal force will accelerate a 400-kg crate at 1 m/s2 across a factory
floor against a friction force half its weight?
A) 600 N
B) 1600 N
C) 2000 N
D) 2400 N
E) none of the above
Answer:
Striations are long parallel scratches in
A) glaciers that show flow direction.
B) bedrock that show the direction of the glaciers flow.
C) bedrock that form next to roches moutonnes.
D) bedrock that show outwash flow direction.
Answer:
You're in a fast-moving train traveling at constant velocity. If you jump straight up you
land
A) slightly ahead of your original position.
B) at your original position.
C) slightly behind your original position.
Answer:
Resonance can be viewed as forced vibration with the
A) least amount of energy input.
B) maximum amount of energy input.
C) matching of wave amplitudes.
D) matching of constructive and destructive interference.
E) minimum beat frequency.
Answer:
Leaving a hot oven door open in a closed room on a cool day
A) decreases room temperature.
B) increases room temperature.
C) doesn't affect room temperature.
Answer:
A primary rainbow is brighter than a secondary rainbow because
A) sunlight reaching it is more intense.
B) there is one less reflection inside the water drops.
C) larger drops produce primary rainbows.
D) the secondary bow is a dim reflection of the primary rainbow.
E) none of the above
Answer:
The acceleration of a cart rolling down an inclined plane (a ramp)
A) is approximately constant.
B) increases with time.
C) decreases with time.
Answer:
A pair of tennis balls fall through the air from a tall building. One ball is regular and the
other is filled with lead pellets. The ball to reach the ground first is the
A) regular ball.
B) lead-filled ball.
C) same for both
Answer:
Which of the following is the weakest?
A) a chemical bond
B) an ion-dipole attraction
C) a dipole-dipole attraction
D) a dipole-induced dipole attraction
E) an induced dipole-induced dipole attraction
Answer:
Stars to the lower left of the Hertzsprung-Russell diagram tend to be relatively
A) hot and blue.
B) long lasting.
C) huge and massive.
D) yellow and of average size.
Answer:
Phil Physiker standing at the edge of a cliff throws one ball straight up and another ball
straight down, both with the same speed. Neglecting air resistance, which ball hits the
ground below with the greater speed?
A) the one thrown upward
B) the one thrown downward
C) neither, both hit with the same speed
Answer:
Radio waves travel at the speed of light, 300,000 km/s. The wavelength of a radio wave
received at 100 MHz is
A) 0.3 m.
B) 3.0 m.
C) 30 m.
D) 300 m.
E) none of the above
Answer:
A martial arts person breaks a board with a blow of 3000 N. The force that acts on the
hand is
A) less than 3000 N.
B) 3000 N.
C) more than 3000 N.
D) not enough information
Answer:
A 10-kg mass at Earth's surface weighs about
A) 1 N.
B) 5 N.
C) 10 N.
D) 100 N.
E) 1000 N.
Answer:
The amount of gravitational force that acts on a space vehicle that orbits Earth is
A) nearly zero.
B) nearly as much as the vehicle's weight on Earth's surface.
C) the same as the vehicle's weight on Earth's surface.
Answer:
Is aging primarily an example of a physical or chemical change?
A) Aging is an example of a physical change since it involves our physical bodies
getting older each day.
B) Aging is an example of a chemical change involving the chemical reformation of our
biomolecules.
C) Aging cannot be classified as either a physical or chemical change.
D) None of the above is true.
Answer:
An example of a convective cloud is the
A) nimbostratus.
B) cumulus.
C) cirrocumulus.
D) altostratus.
Answer:
Earth's core is probably composed of
A) silicate minerals.
B) aluminum oxides.
C) an iron-nickel alloy.
D) calcium magnesium sulfate.
Answer:
Divergent boundaries are areas of
A) tensional forces that stretch the crust and generate a spreading center.
B) compressional forces that crunch the crust and generate a spreading center.
C) compressional forces that crunch and shorten the crust by folding and faulting.
D) plate collision.
Answer:
The temperature of a star is evidenced by its
A) brightness.
B) color.
C) angular momentum.
D) distance.
E) rate of burning.
Answer:
The greenish blue of water is evidence for the
A) reflection of greenish-blue light.
B) reflection of red light.
C) absorption of greenish-blue light.
D) absorption of red light.
E) interaction between green and blue frequencies of light.
Answer:
What happens when the air is saturated?
A) The condensation rate equals the evaporation rate.
B) The air is at its water vapor capacity.
C) Relative humidity is 100%.
D) The air temperature equals the dew point temperature.
E) all of the above
Answer:
A vase sits at rest on a table. If the action force is Earth pulling downward on the vase,
the reaction force is the
A) table pushing upward on the vase.
B) vase pulling upward on Earth.
C) vase pulling upward on both the table and Earth.
D) none of the above
Answer:
Cosmic background radiation refers to
A) uniformly distributed residual radiation that resulted from the Big Bang.
B) pockets of radiation found in certain quadrants of the observable universe.
C) the radiation emitted from galactic nuclei.
D) redshifted microwave radiation being emitted from the center of the universe.
Answer:
When a gas changes phase to become a solid, energy is
A) absorbed.
B) released.
C) unchanged.
Answer:
Which of the following is a correctly balanced equation?
A) P4 + 6 H2 → 4 PH3
B) 1 P4 + 6 H2 → 4 PH3
C) 0 P4 + 6 H2 → 4 PH3
D) 2 P4 + 12 H2 → 8 PH3
E) P4 + 3 H2 → PH3
Answer:
Weight can be simulated in a space vehicle if the vehicle is
A) falling.
B) in a circular orbit about Earth.
C) rotating.
D) none of the above
Answer:
To say that water has a high specific heat capacity is to say that water
A) requires a lot of energy for an increase in temperature.
B) releases a lot of energy in cooling.
C) absorbs a lot of energy for an increase in temperature.
D) all of the above
Answer:
If seafloor spreading creates new lithosphere, does the size of Earth change?
A) Yes, Earth is getting larger.
B) No, the extra crust is crumpled up to form mountains.
C) No, older crust is recycled back into the asthenosphere.
D) Yes, the Earth is shrinking because it is cooling.
Answer:
