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All About Sound!
Test Description: Answer the questions regarding sound to the best of your ability
Instructions: Answer all questions to get your test result.
1) What is not true of a mechanical wave?
A
There are two types of mechanical waves
B
Transfer of energy through the medium (result of particle collision) is present
C
Wave propagation through a material medium (solid, liquid, gas)
D
Sound is the only type of mechanical wave
2) What is an example of a longitudinal wave?
A
Sound wave
B
Seismic wave
C
Ocean wave
D
Hand wave
3) A string produces sound when:
A
Vibration of the string creates a sound particle, which emits a pitch
B
Disturbance of string creates echoes heard as pitches
C
Disturbance of string produces energy which is emitted as sound
D
Vibration of the string creates a fundamental frequency, which emits a pitch
4) Which is not true of a resonant frequency?
A
Natural frequency determined by the physical properties of an object
B
Vibrates in a manner such that a standing wave pattern is formed within the object
C
Must be the lowest possible frequency at which a string could vibrate to form a standing wave
D
All true
5) What causes sound in wind instruments?
A
Standing waves that travel in the air pipes from nodes on closed ends to anti nodes on open ends
B
Refraction of sound blown into the wind pipes and into air
C
Standing waves that travel in the air pipes from nodes on open ends to antinodes on closed ends
D
Reflection of sound blown into the wind pipes and into air
6) The principle of superposition states:
A
Wavelength is inversely propotional to frequency
B
Sound travels in wave form
C
Sound waves travel at incredibly high velocities
D
The combined waveform of interfering waves equals the sum of displacements of individual waves
7) What allows us to distinguish the same note on different instruments?
A
Slight pitch difference
B
Timbre
C
Fundamental frequencies
D
Different sound particles
8) What is not a factor in determining pitch from a string instrument?
A
Length of string
B
Plucking string v bowing on string
C
Mode of vibration
D
Thickness of string
9) What is NEVER true of a wave?
A
Transfer of energy between particles (the result of particle collision)
B
Can be a regular rhythmic disturbance either of a medium and moving through that medium
C
Can be some quantity with different values at different points in space and moving through space
D
Wavelength is proportional to frequency
10) What is unique of a fundamental frequency?
A
It is the lowest possible frequency at which a string could vibrate to form a standing wave pattern
B
It is the lowest possible frequency at which a string could vibrate to form a longitudinal wave
C
It is present in only longitudinal waves
D
Is the only frequency that can be heard by the human ear
*select an answer for all questions
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