Physics Principles and Problems 2009

Section 15.2 : The Physics of Music

Self-Check Quizzes

1
In brass and reed instruments, the length of the tube determines the _____ of the sound vibration.
A)frequency
B)amplitude
C)volume
D)pressure
2
In _____, the pressure of the reflected wave is inverted.
A)a closed-pipe resonator
B)musical instrument
C)tuning fork
D)an open-pipe resonator
3
Why is a string instrument tuned by changing the tension on the strings?
A)The frequency of a string depends on the tension of the string.
B)A tighter string can produce a pure sound.
C)The strings will strike the sounding board if the tension is right.
D)The cross-sectional areas of the strings are very small.
4
Pitches that are consonant are related by _____.
A)their timbre
B)the number of fundamentals they have
C)their octave
D)the ratio of their frequencies
5
The note C has a frequency of 262 Hz. What length of closed organ pipe would be needed to play a C note?
A)3.05 m
B)0.327 m
C)1.31 m
D)32.7 m
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