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A good reflector of radiation is a
A) good absorber of radiation.
B) good emitter of radiation.
C) poor absorber of radiation.
D) none of the above
The conversion of mass to energy of other forms via nuclear fission is
A) less than 1%.
B) about 10%.
C) about 20%.
D) about 30%.
E) more than 30%.
A ring and a disk both at rest roll down a hill together. Which rolls slower?
A) ring
B) disk
C) depends on the masses
D) both roll at the same speed
E) need more information
Alternating current is normally produced by a
A) battery.
B) generator.
C) both of these
D) neither of these
The function of polarizing filters in viewing 3-D slides or movies is to provide each eye
A) the ability to see parallax.
B) a balanced intensity.
C) an independent left or right-eye view.
D) a stereoscopic view.
E) with light polarized at right angles to each other.
Ice tends to form first at the
A) surface of bodies of water.
B) bottom of bodies of water.
C) either depending on water depth.
A 1000-kg car and a 2000-kg car are hoisted to the same height. Raising the more
massive car requires
A) less work.
B) as much work.
C) twice as much work.
D) four times as much work.
E) more than four times as much work.
Fluorescent minerals on display in museums are illuminated with
A) infrared light.
B) ultraviolet light.
C) often either or both
D) none of these
Resonance occurs with forced vibration that requires 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.
In the photoelectric effect, the brighter the illuminating light on a photosensitive
surface, the greater the
A) number of ejected electrons.
B) velocity of ejected electrons.
C) both of these
D) neither of these
A beam of electrons passing through a magnetic field experiences maximum deflection
if the direction of the beam is
A) parallel to the field lines.
B) perpendicular to the field lines.
C) none of these
Radioactivity in the world is something
A) relatively new.
B) as old as the world itself.
C) to become frantic about.
If an antimatter meteor of mass m were to strike the Earth, the amount of radiant energy
produced would be
A) less than mc2.
B) mc2.
C) 2mc2.
D) none of the above
Translational motion is characterized by
A) motion that carries a molecule from one place to another.
B) the motion used in measuring temperature.
C) both of these
D) neither of these
Foreign ions introduced to water
A) lower the freezing point of water.
B) raise the freezing point of water.
C) do not affect water's freezing point.
There is an upper limit on the speed of a particle, which means there is also an upper
limit on its
A) momentum.
B) kinetic energy.
C) both of these
D) neither of these
A 340-hertz sound wave travels at 340 m/s in air with a wavelength of
A) 1 m.
B) 10 m.
C) 100 m.
D) 1000 m.
E) none of the above
A vehicle undergoes acceleration when it
A) gains speed.
B) loses speed.
C) changes its direction.
D) all of the above
Einstein's theory of gravitation
A) agrees with established results of Newton's theory.
B) has been supported by repeated experiments.
C) incorporates Newton's theory as a special case.
D) is superior to Newton's where spacetime is more curved.
E) all of the above
Which of these atoms has the greatest amount of electrical charge in its nucleus?
A) helium
B) carbon
C) iron
D) gold
E) uranium
Diffraction is evident when a wave passes
A) through a small opening.
B) the edge of an object.
C) both of these
D) neither of these
Three-dimensional viewing normally involves
A) parallax.
B) two-eye vision.
C) an ability to see 'around' things.
D) all of the above
E) none of the above
A jet traveling at 1500 km/h passes overhead. The sonic boom produced is heard by
A) a listener on the ground.
B) the jet pilot.
C) both of these
D) neither of these
Atoms heavier than helium were at one time manufactured by
A) photosynthesis.
B) thermonuclear fusion.
C) radiant energy conversion.
D) radioactivity.
E) none of the above
A main difference between gravitational and electric forces is that electrical forces
A) attract.
B) repel or attract.
C) obey the inverse-square law.
D) act over shorter distances.
E) are weaker.
The quality of a musical note has to do with its
A) loudness.
B) frequency.
C) harmonics.
D) amplitude.
E) none of the above
Ohm's law tells us that the amount of current produced in a circuit is
A) directly proportional to voltage.
B) inversely proportional to resistance.
C) both of these
D) neither of these
Which of these is correct?
A) a piece of solid iron floats in molten iron.
B) a piece of solid aluminum floats in molten aluminum.
C) a piece of ice floats in water.
D) all the above
E) none of the above
The source of a sonic boom may be a
A) whip.
B) a high-speed bullet.
C) both of these
D) neither of these
The device that spreads light into its component colors in a spectroscope is a
A) prism.
B) diffraction grating.
C) either of these
D) neither of these
