Chapter 6 Multiple Choice Quiz 2

Please answer all questions


1	Simple harmonic motion is
		A)	any motion that results in a pure tone.
		B)	a combination of overtones.
		C)	a vibration with a restoring force proportional and opposite to a displacement.
		D)	all of the above.


2	The displacement of a vibrating object is measured by
		A)	a cycle.
		B)	amplitude.
		C)	the period.
		D)	frequency.


3	The time required for a vibrating object to complete one full cycle is the
		A)	frequency.
		B)	amplitude.
		C)	period.
		D)	hertz.


4	The number of cycles that a vibrating object moves through during a time interval of 1 second is the
		A)	amplitude.
		B)	period.
		C)	full cycle.
		D)	frequency.


5	The unit of cycles per second is called a
		A)	hertz.
		B)	lambda.
		C)	wave.
		D)	watt.


6	The period of a vibrating object is related to the frequency, since they are
		A)	directly proportional.
		B)	inversely proportional.
		C)	frequently proportional.
		D)	not proportional.


7	A wave is
		A)	the movement of material from one place to another place.
		B)	a traveling disturbance that carries energy.
		C)	a wavy line that moves through materials.
		D)	all of the above.


8	A longitudinal mechanical wave causes particles of a material to move
		A)	back and forth in the same direction the wave is moving.
		B)	perpendicular to the direction the wave is moving.
		C)	in a circular motion in the direction the wave is moving.
		D)	in a circular motion opposite the direction the wave is moving.


9	A transverse mechanical wave causes particles of a material to move
		A)	back and forth in the same direction the wave is moving.
		B)	perpendicular to the direction the wave is moving.
		C)	in a circular motion in the direction the wave is moving.
		D)	in a circular motion opposite the direction the wave is moving.


10	Transverse mechanical waves will move only through
		A)	solids.
		B)	liquids.
		C)	gases.
		D)	all of the above.


11	Longitudinal mechanical waves will move only through
		A)	solids.
		B)	liquids.
		C)	gases.
		D)	all of the above.


12	A pulse of jammed-together molecules that quickly moves away from a vibrating object
		A)	is called a condensation.
		B)	causes an increased air pressure when it reaches an object.
		C)	has a greater density than the surrounding air.
		D)	includes all of the above.


13	The characteristic of a wave that is responsible for what you interpret as pitch is the wave
		A)	amplitude.
		B)	shape.
		C)	frequency.
		D)	height.


14	The extent of displacement of a vibrating tuning fork is related to the resulting sound wave characteristic of
		A)	frequency.
		B)	amplitude.
		C)	wavelength.
		D)	period.


15	The number of cycles that a vibrating tuning fork experiences each second is related to the resulting sound wave characteristic of
		A)	frequency.
		B)	amplitude.
		C)	wave height.
		D)	quality.


16	From the wave equation of v = lf, you know that the wavelength and frequency at a given velocity are
		A)	directly proportional.
		B)	inversely proportional.
		C)	directly or inversely proportional, depending on the pitch.
		D)	not related.


17	Since v = lf, then f must equal
		A)	vl.
		B)	v/l.
		C)	l/v.
		D)	vl/l.


18	Sound waves travel faster in
		A)	solids as compared to liquids.
		B)	liquids as compared to gases.
		C)	warm air as compared to cooler air.
		D)	all of the above.


19	The difference between an echo and a reverberation is
		A)	an echo is a reflected sound; reverberation is not.
		B)	the time interval between the original sound and the reflected sound.
		C)	the amplitude of an echo is much greater.
		D)	reverberation comes from acoustical speakers; echoes come from cliffs and walls.


20	Sound interference is necessary to produce the phenomenon known as
		A)	resonance.
		B)	decibels.
		C)	beats.
		D)	reverberation.


21	The efficient transfer of energy that takes place at a natural frequency is known as
		A)	resonance.
		B)	beats.
		C)	the Doppler effect.
		D)	reverberation.


22	The fundamental frequency of a standing wave on a string has
		A)	one node and one antinode.
		B)	one node and two antinodes.
		C)	two nodes and one antinode.
		D)	two nodes and two antinodes.


23	The fundamental frequency of a standing wave in an air column of a closed tube has
		A)	one node and one antinode.
		B)	one node and two antinodes.
		C)	two nodes and one antinode.
		D)	two nodes and two antinodes.


24	The fundamental frequency of a standing wave in an air column of an open tube has
		A)	one node and one antinode.
		B)	one node and two antinodes.
		C)	two nodes and one antinode.
		D)	two nodes and two antinodes.


25	An observer on the ground will hear a sonic boom from an airplane traveling faster than the speed of sound
		A)	only when the plane breaks the sound barrier.
		B)	as the plane is approaching.
		C)	when the plane is directly overhead.
		D)	after the plane has passed by.

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