Which of the following statements best explains why sound can NOT travel through a vacuum?
Sound requires particles to transfer energy, but a vacuum has no particles.
Sound is a mechanical wave: it travels by making the particles of a medium vibrate and pass the energy on to neighbouring particles.
A vacuum contains no particles, so there is nothing to carry the vibrations and sound cannot travel through it.
Sound does not need light, and it does not travel faster in a vacuum.
Hence, the answer is that sound requires particles to transfer energy, but a vacuum has no particles.
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