Which of the following statements correctly applies to the physical behavior of “Sound”?
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Answer: A. Sound cannot travel through a vacuum
Explanation
Sound is a mechanical wave that requires a physical medium of particles to travel through, meaning it cannot propagate through a vacuum. Without molecules to compress and rarefy, acoustic energy has no way to transmit from a source to a receiver. Vacuum environments lack the necessary matter for longitudinal wave propagation, rendering sound completely inaudible. Mechanical waves depend on the elastic properties and inertial mass of the transmitting medium to transfer energy. Sound travels faster in denser media because closely packed particles transmit vibrational energy much more efficiently. The speed of sound in dry air at sea level is approximately 343 meters per second under normal conditions.
Option B is incorrect because sound travels effectively through gaseous media like air by creating pressure waves. Option C is incorrect because sound propagates even faster through liquid media such as water than it does through gases. Option D is incorrect because sound travels with the highest speed and efficiency through solid media with tightly bound particles.
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- Everyday Science
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- Everyday Science
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