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Power is defined as the
A) force exerted divided by the time of exertion.
B) force exerted multiplied by the distance moved.
C) work done multiplied by the time to do the work.
D) work done divided by the time to do the work.
E) none of the above
Answer:
When you read from a printed page, you're seeing reflected light that is
A) specular.
B) diffuse.
C) both of these
D) neither of these
Answer:
A compass needle in a magnetic field experiences
A) a torque.
B) a net force.
C) both of these
D) none of the above
Answer:
Why is carbon dioxide able to be stored more effectively in ocean water vs. fresh
water?
A) The pH of the ocean is pretty high and so the carbon dioxide is trapped in a
neutralization reaction.
B) The oceans are large and so you can dissolve more CO2 in them.
C) Gases are more soluble in cold water than warm water and the oceans are colder
than fresh water lakes so you can dissolve more CO2 in them.
D) The pH of the ocean is very low and so the carbon dioxide is trapped as an acid
because like dissolves like.
E) none of the above
Answer:
If the volume of an object doubles with no change in mass, its density would be
A) half.
B) double.
C) unchanged.
Answer:
If the greenhouse effect on Earth were absent, Earth's average temperature would be
about
A) -18C.
B) appreciably warmer.
C) as it is now.
Answer:
As rock is weathered it breaks down and erodes. Sedimentation begins where erosion
stops. Erosion is
A) disintegration and fragmentation of rock into smaller pieces.
B) a chemical process.
C) decomposition and alteration of rock material.
D) transportation of rock particles via water wind or ice.
Answer:
One second after a ball rolls off the edge of a horizontal surface at a speed of 10 m/s,
A) its vertical component of velocity is 10 m/s.
B) its speed is about 14 m/s.
C) both of these
D) none of the above
Answer:
Electric charge will flow in an electric circuit when
A) electric resistance is low.
B) a potential difference exists.
C) the circuit is grounded.
D) electric devices in the circuit are not defective.
Answer:
The two most abundant elements that make up the salinity of seawater are
A) sodium and potassium.
B) chlorine and sulfur.
C) calcium and sulfur.
D) chlorine and sodium.
Answer:
If the following generic atom were to undergo ionization, what would be the charge of
most likely product?
A) +3
B) -3
C) -5
D) 8
E) would probably not ionize
Answer:
The metal detectors that travelers walk through at airports operate via
A) Ohm's law.
B) Faraday's law.
C) Coulomb's law.
D) Newton's laws.
Answer:
When a baseball player hits a ball with a force of 1000 N, the ball exerts a force on the
bat of
A) less than 1000 N.
B) more than 1000 N.
C) 1000 N.
Answer:
How does ingested methanol lead to the damaging of a person's eyes?
A) Eye tissues are soluble in methanol.
B) The methanol is metabolized into formaldehyde, which is toxic to most living tissue.
C) Methanol is very volatile. When brought close to the eyes, its vapors can harm the
eyes.
D) The methanol, once in the eyes, forms a crystalline precipitate that accumulates
within the retina.
Answer:
A neutron makes a better nuclear bullet than a proton or an electron because it
A) has the greatest mass.
B) carries no electrical charge.
C) can be accelerated by electromagnetic fields.
D) all of the above
Answer:
White-hot sparks from a fireworks sparkler that strike your skin don't cause injury
because
A) they have a low temperature.
B) the energy per molecule is very low.
C) the energy per molecule is high, but the total energy transferred is small.
Answer:
Water in the unsaturated zone is called
A) groundwater.
B) unsaturated water.
C) pore-water.
D) soil-moisture.
Answer:
Strictly speaking, gas pressure inside an inflated stretched balloon is
A) less than air pressure outside the balloon.
B) equal to air pressure outside the balloon.
C) slightly greater than air pressure outside the balloon.
Answer:
Air moves away from a high-pressure region where it
A) sinks.
B) rises.
C) cools.
D) stops.
Answer:
Does the average distance that a neutron travels through fissionable material before
escaping increase or decrease when two pieces of fissionable material are assembled
into one piece? Does this assembly increase or decrease the probability of an explosion?
A) The average distance increases while the probability of an explosion also increases.
B) The average distance decreases while the probability of an explosion decreases.
C) The average distance increases while the probability of an explosion decreases.
D) The average distance decreases while the probability of an explosion increases.
Answer:
The vast numbers of electrons in a coin don't fly off the surface because
A) mutual repulsion is incomplete.
B) they are attracted by an equal number of protons.
C) they are strongly bonded to their atoms.
D) all of the above
E) none of the above
Answer:
How many molecules of aspirin (formula mass aspirin = 180.0 amu) are there in a
0.250-gram sample?
A) 6.02
B) 8.36
C) 1.51
D) More information is needed.
Answer:
Dark energy
A) is the phenomenon responsible for the acceleration of the universe.
B) would be considered to be the opposite of gravity.
C) is energy that exerts an outward pressure, causing spacetime to expand.
D) All of the above
Answer:
When an apple that weighs 1 N is held at rest above your head, the net force on the
apple is
A) 0 N.
B) 0.1 N.
C) 1 N.
D) 10 N.
E) none of the above
Answer:
The planet Jupiter is about 300 times as massive as Earth, yet on its surface you would
weigh only about 3 times as much because
A) your mass is 100 times less on Jupiter.
B) Jupiter is significantly farther from the Sun.
C) Jupiter's radius is 10 times Earth's radius.
D) you are 100 times more weightless there.
E) none of the above
Answer:
When a steady voltage is across one-half as much resistance, the current
A) is half.
B) remains the same.
C) is doubled.
D) is quadrupled.
Answer:
The current through two identical light bulbs connected in series is 0.25 A. The voltage
across both bulbs is 110 V. The resistance of a single light bulb is
A) 22 ohms.
B) 44 ohms.
C) 220 ohms.
D) 440 ohms.
E) none of the above
Answer:
Which of the following might have the lowest solubility in water?
A) CH3OH
B) Cl2
C) O2
D) CH3CH3
E) none of the above
Answer:
Magnetic domains normally occur in
A) iron.
B) copper.
C) silver.
D) all of the above
E) none of the above
Answer:
Acceleration and velocity are
A) different names for the same idea.
B) very different from each other.
C) concepts developed by Aristotle.
D) none of the above
Answer:
Cave formation in limestone does not involve
A) mildly acidic groundwater.
B) dissolution of carbonate rocks.
C) land subsidence.
D) a dropping water table.
Answer:
Which of the following material phases cannot form a solution?
A) solids
B) liquids
C) gases
D) All of the above can form solutions.
E) None of the above can form solutions.
Answer:
