Unlock document.
This document is partially blurred.
Unlock all pages and 1 million more documents.
Get Access
Which light-emitting process is characterized by an afterglow?
A) incandescence.
B) fluorescence.
C) phosphorescence.
D) resonance.
E) none of the above
Which of these electromagnetic waves have the shortest wavelength?
A) radio waves
B) infrared waves
C) X-rays
D) ultraviolet waves
E) light waves
Connect a pair of lamps in series and current is drawn from the battery. Connect the
same lamps in parallel and the current drawn is
A) less.
B) the same.
C) more.
D) sometimes more, sometimes less.
The stride of a horse would be quicker if more mass in its legs were concentrated
A) in the upper part, nearer the horse's body.
B) towards its feet.
C) halfway up its legs.
D) uniformly all along its legs.
E) none of the above
Which interacts more with high-frequency light?
A) large particles
B) small particles
C) both the same
The part of the electromagnetic spectrum most absorbed by water is
A) infrared.
B) red.
C) cyan.
D) all about equally.
Consider some water at 6oC. For a slight increase its temperature the water will
A) expand.
B) contract.
C) remain the same.
Aluminum has a higher specific heat capacity than iron. This means that for equal
masses of aluminum and iron, the metal that heats more quickly when the same amount
of heat is applied is
A) aluminum.
B) iron.
C) need more information
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
Light at the peak frequency of an incandescent lamp depends on the
A) amount of electrical energy transformed.
B) rate of atomic and molecular vibrations.
C) voltage applied to the lamp.
D) electrical resistance of the lamp.
E) transparency of glass.
An object in mechanical equilibrium is an object
A) moving with constant velocity.
B) having no changes in velocity.
C) at rest.
D) all of the above
The ram of a pile driver drops onto the top of an iron beam, driving it partway into the
ground. The distance that the beam sinks into the ground depends on the
A) initial height of the ram.
B) initial potential energy of the ram.
C) kinetic energy of the ram when it first hits the beam.
D) all of the above
Compared to the density of water, the density of a fish is
A) more.
B) less.
C) the same.
The discreteness of energy levels is best understood by considering the electrons to be
A) like tiny planets orbiting a sun.
B) attached to the nucleus by massless springs.
C) much less massive than the nucleus.
D) all of the above
E) none of the above
As the number of loops in a current-carrying wire is increased, the
A) more spread out is the magnetic field.
B) stronger the enclosed magnetic field.
C) weaker the current.
D) greater the back emf.
A mirage occurs when light travels faster
A) near the ground than higher up.
B) in less dense air than more dense air higher up.
C) both of these
D) neither of these
A Geiger counter placed 1 meter from a point source of radiation registers 100 counts
per minute. If the Geiger counter is moved closer, half-way to the source, the counting
rate will be
A) 25 counts/min.
B) 50 counts/min.
C) 100 counts/min.
D) 200 counts/min.
E) 400 counts/min.
Solar power is commonly used to produce
A) heat.
B) electricity.
C) both of these
The rotational inertia of your leg is greater when your leg is
A) straight.
B) bent.
C) same either way
A flywheel's diameter is twice that of another of the same shape and mass. Rotational
inertia of the larger flywheel is
A) two times greater.
B) four times greater.
C) the same as the other's.
D) half.
The image in a pinhole camera is
A) always inverted.
B) sometimes inverted.
C) always right-side up.
Which of these are good conductors?
A) feathers.
B) wood.
C) snow.
D) all the above
E) none of the above
When water at 4oC is heated it expands. If it is instead cooled it will
A) contracts.
B) also expand.
C) neither contracts nor expands.
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
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
A dolphin perceives its environment by the sense of
A) sight.
B) sound.
C) both of these
D) neither of these
When sound waves superimpose they can interfere
A) constructively.
B) destructively.
C) either of these
D) neither of these
If the composition of the upper atmosphere were altered to permit a greater amount of
terrestrial radiation to escape, Earth would be
A) cooler.
B) warmer.
C) quite unaffected.
D) none of the above
Sound interference with a pair of radio loudspeakers can be nicely demonstrated when
the
A) radio signal is monaural for each.
B) input and output of the speakers are reversed.
C) speakers are brought face to face.
D) all of the above
E) none of the above
The most concentrated form of energy is
A) wind.
B) fossil fuel.
C) geothermal.
D) nuclear.
Entropy is most closely related to the
A) first law of thermodynamics.
B) second law of thermodynamics.
C) both of these
D) neither of these
When two light atoms fuse together, mass
A) converts to kinetic energy.
B) converts to high-energy gamma radiation.
C) is created from energy of other forms.
D) is gained.
Atoms can be photographed by
A) electron beams.
B) scanning electron microscopes.
C) both of these
D) neither of these
