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An object's weight is properly expressed in units of
A) meters.
B) kilograms.
C) newtons.
D) cubic centimeters.
The source of a sonic boom
A) must be a sound emitter.
B) may or may not be a sound emitter.
C) is not a sound emitter.
D) none of the above
An object covers a distance of 8 meters in the first second of travel, another 8 meters
during the next second, and 8 meters again during the third second. Its acceleration is
A) 0 m/s2.
B) 5 m/s2.
C) 8 m/s2.
D) 24 m/s2.
Communications and weather satellites always appear at the same place in the sky,
because these satellites are
A) beyond the pull of Earth's gravitational field.
B) moving at a speed just short of escape velocity.
C) orbiting Earth with a 24-hour period.
D) stationary in space.
E) none of the above
Physicists find that the energy states of atoms are
A) discrete.
B) circular.
C) elliptical.
D) chaotic.
Which of these nuclei has the least mass?
A) hydrogen
B) iron
C) lead
D) uranium
E) all the same
A body of water will be deeper when its
A) temperature rises.
B) temperature drops.
C) neither of these
According to the special theory of relativity, while traveling at very high speed your
pulse rate
A) increases.
B) decreases.
C) remains unchanged.
Art museums use weaker wires than those used in homes because paintings in museums
A) are suspended by pairs of vertical wires.
B) are usually lighter in weight.
C) are more firmly attached.
An un-stretched hanging spring is 50 cm long. Suspending a 100-N block from it
increases its length to 60 cm. Adding another 100-N block makes the spring's length
A) 60 cm.
B) 70 cm.
C) 80 cm.
D) 100 cm.
E) 120 cm.
The crystals in matter are held together by
A) cohesive forces.
B) amorphous forces.
C) electrical bonding forces.
D) excess neutrons.
When current reverses direction in a wire, the surrounding magnetic field
A) also reverses direction.
B) becomes momentarily stronger.
C) contracts.
D) expands.
The unit of electric charge, the coulomb, is the charge on a
A) single electron.
B) specific large number of electrons.
C) neutron.
D) specific number of neutrons.
E) quark.
The mass of matter is due mostly to its
A) protons.
B) electrons.
C) both of these
Using the Schrdinger equation, scientists can calculate
A) probabilities.
B) the position of an electron.
C) the velocity of an electron.
D) all of the above
A 1-kg mass at the Earth's surface weighs
A) 1 N.
B) 5 N.
C) 10 N.
D) 12 N.
E) none of the above
Compared to its average speed in air, the average speed of a beam of light in glass is
A) more.
B) less.
C) the same.
As we become older, the frequency range of human hearing
A) decreases.
B) increases.
C) remains relatively constant.
In the fissioning of uranium, a chain reaction is caused by
A) the kinetic energy of the decay products.
B) ejected neutrons.
C) alpha particles.
D) none of the above
When water vapor condenses on the inside of a window, the room becomes slightly
A) warmer.
B) cooler.
C) both of these
D) neither of these
You can safely stand on the overhanging end of a heavy plank that rests on a table. How
much overhang depends on your mass and the mass of the plank. If you can stand on
the end of a plank that overhangs the edge of the supporting table 1/5 its total length,
how massive is the plank compared to your mass?
A) 1/3
B) the same
C) 2/3
D) 1 and 1/3 times
E) more than 1 and 1/3 times
When waves from a pair of closely-spaced slits arrive in phase
A) a bright fringe is produced.
B) a dark fringe is produced.
C) both bright and dark fringes are produced.
D) none of the above
A diver shines light upward to the surface of a smooth pond at 20o to the normal. Most
light passes into the air above while the part that reflects back into the water makes an
angle to the normal of
A) less than 20o.
B) 20o.
C) more than 20o
D) all refracts, none reflects.
Sound travels faster in air if the air temperature is
A) warm.
B) cold.
C) average.
D) any of the above
The vibrations of a transverse wave move
A) along the direction of wave travel.
B) at right angles to the direction of wave travel.
C) that changes with speed.
The brakes of a speeding truck are slammed on and it skids to a stop. If the truck were
heavily loaded so that it had twice the total mass, the skidding distance would be
A) half as far.
B) 1.5 times as far.
C) twice as far.
D) 4 times as far.
E) the same.
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
To melt 50 grams of 0-degree-Celsius ice requires
A) 25 calories.
B) 50 calories.
C) 80 calories.
D) none of the above
A very massive object A and a less massive object B move toward each other under the
influence of gravity. Which force, if either, is greater?
A) the force on A
B) the force on B
C) both forces are the same.
Detonation of a fusion-type hydrogen bomb begins by
A) splitting uranium.
B) pressing together pieces of uranium.
C) igniting a fission bomb.
D) all of the above
E) none of the above
When a colored light in air shines on water and is refracted, its frequency
A) decreases.
B) remains unchanged.
C) increases.
When a change occurs in the magnetic field in a closed loop of wire
A) a voltage is induced in the wire.
B) a current is created in the loop of wire.
C) electromagnetic induction occurs.
D) all of the above
E) none of the above
How many atoms are in this carbohydrate molecule, C6H12O6?
A) 3.
B) 14.
C) 18.
D) 24.
E) none of the above
The speed of sound in air is greatest for
A) high frequencies.
B) low frequencies.
C) same for all frequencies.
The speedometer of an automobile reads
A) average speed.
B) instantaneous speed.
C) accelerated speed.
