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Properties of Sound Waves — Quiz Answers

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If the amplitude of a wave increases by a factor of 4, how is the intensity changed?

A
it decreases by a factor of 16
B
it increases by a factor of 16
C
it decreases by a factor of 4
D
it increases by a factor of 4
2
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A sound wave with a power of 8 point 8 times 10 to the negative 4 power cap w leaves a speaker and passes through section A, which has an area of 5 point 0 m squared What is the intensity of sound in this area? open paren Intensity is equal to cap i is equal to the fraction with numerator cap p o w e r and denominator mathrm cap A r e A close paren

A
1 point 8 times 10 to the negative 6 power the fraction with numerator cap w and denominator m squared
B
1 point 8 times 10 to the negative 4 power the fraction with numerator cap w and denominator m squared
C
1 point 6 times 10 to the negative 6 power the fraction with numerator cap w and denominator m squared
D
1 point 6 times 10 to the negative 4 power the fraction with numerator cap w and denominator m squared
3

Which sound will most likely have the highest pitch?

A
a bass drum (150 Hz)
B
a tuba (60 Hz)
C
a whistle (1000 Hz)
D
a distant thunder (90 Hz)
6

Which best describes pitch?

A
the amount of time taken for a longitudinal wave to produce one cycle
B
the distance between two corresponding parts of a transverse wave
C
the number of cycles per second perceived by the human ear
D
the amplitude of a wave when the natural frequency is matched
7

These graphs show measurements of the density of air as different sound waves pass a single point. Which sound wave will most likely be perceived as the loudest?

A
Image with description A graph with time on the x axis and density of air on the y axis. There is a transverse wave that is very short and wide.
B
Image with description A graph with time on the x axis and density of air on the y axis. There is a transverse wave that is very tall and same width.
C
Image with description A graph with time on the x axis and density of air on the y axis. There is a transverse wave that is tall.
D
Image with description A graph with time on the x axis and density of air on the y axis. There is a transverse wave that is short and wide.
9

As the distance of a sound wave from its source quadruples, how is the intensity changed?

A
it decreases by a factor of 4
B
it decreases by a factor of 16
C
it increases by a factor of 16
D
it increases by a factor of 4

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