Answer:

1.solids,the molecules in a solid medium are much closer together than those in the liquid or gas. 2.Sound travels the slowest through gases because the molecules of a gas are farthest apart.3.The more rigid (or less compressible) the medium, the faster the speed of sound. This observation is analogous to the fact that the frequency of a simple harmonic motion is directly proportional to the stiffness of the oscillating object.

Explanation:

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