Speed of Sound Through Different Substances

This question that we previously answered on the speed of sound should answer your question as well. The second and third paragraphs, in particular, address the differences in the speed of sound through different substances. The quick answer is that the more densely packed the molecules of a substance are, the faster sound will travel through that substance. Therefore, sound travels fastest through a solid and slowest through a gas.
- answer by Jeff Scott, 15 September 2002

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