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Main sources of noise pollution are


A) Transportation equipment only
B) Heavy machinery only
C) Musical instruments
D) Transportation equipment and heavy machinery

E) A) and B)
F) B) and C)

Correct Answer

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Which of the following can not travel through a vacuum?


A) Electromagnetic wave
B) Radio wave
C) Sound wave
D) Light wave

E) B) and C)
F) A) and D)

Correct Answer

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A microphone that uses the piezoelectric effect


A) Dynamic
B) Condenser
C) Crystal
D) Carbon

E) B) and C)
F) A) and D)

Correct Answer

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Sound wave has two main characteristics which are


A) Pitch and loudness
B) Tone and loudness
C) Highness and loudness
D) Rarefaction and compression

E) C) and D)
F) B) and D)

Correct Answer

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