MCAT Physics Question 102: Answer and Explanation
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Question: 102
12. In which of the following media does sound travel the fastest?
- A. Vacuum
- B. Air
- C. Water
- D. Glass
Correct Answer: D
Explanation:
Sound is a mechanical disturbance propagated through a deformable medium; it is transmitted by the oscillation of particles parallel to the direction of the sound wave's propagation. As such, sound needs matter to travel through, eliminating choice (A). The speed of propagation is fastest in solid materials, followed by liquids, and slowest in gases.