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Question

Complete each of the following sentences by choosing the correct term from the word bank.
(loudness, echoes, pitch, noise, solids, sound quality, vibrations, wavelength, frequency, wave, vacuum, amplitude, lesser, infrasonics, ultrasonics).
Sound cannot travel through .......... .

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Solution
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Sound is a mechanical wave and mechanical waves require medium having the properties of elasticity and inertia , vacuum means absence of any medium , therefore sound waves being a mechanical wave cannot travel through vacuum .

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