Identify the correct statement from among the following:
Answer
The correct answer is C: Sound cannot travel through vacuum.. Sound requires a material medium (solid, liquid or gas) to propagate because it travels as mechanical longitudinal waves involving vibrations of particles. In a vacuum there are no particles to vibrate, so sound cannot travel.
A.The lower the frequency of the vibration, higher is the pitch.
B.The loudness of sound is determined by the frequency of vibration.
C.Sound cannot travel through vacuum.✓ Correct
D.Pitch of sound is determined by its amplitude.
Explanation
Sound requires a material medium (solid, liquid or gas) to propagate because it travels as mechanical longitudinal waves involving vibrations of particles. In a vacuum there are no particles to vibrate, so sound cannot travel. The other options are incorrect: higher frequency gives higher pitch (not lower); loudness is determined by amplitude (not frequency); and pitch is determined by frequency (not amplitude).
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