The regions of compressions and rare fractions of sound wave are-estab – McqOptions

MCQOPTIONS

1.	The regions of compressions and rare fractions of sound wave are-established because
A.	the sound wave undergoes diffraction behind obstacles
B.	the reflected sound wave at fixed end interferes with the incident wave
C.	the longitudinal movement of air molecules produce pressure fluctuations
D.	the speed of the sound wave changes as it travels through a medium
Answer» D. the speed of the sound wave changes as it travels through a medium

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