1/23/2024 0 Comments Speed of sound in steelP-waves have speeds of 4 to 7 km/s, and S-waves range in speed from 2 to 5 km/s, both being faster in more rigid material. Both types of earthquake waves travel slower in less rigid material, such as sediments. For that reason, the speed of longitudinal or pressure waves (P-waves) in earthquakes in granite is significantly higher than the speed of transverse or shear waves (S-waves). The bulk modulus of granite is greater than its shear modulus. Earthquakes produce both longitudinal and transverse waves, and these travel at different speeds. Seismic waves, which are essentially sound waves in Earth’s crust produced by earthquakes, are an interesting example of how the speed of sound depends on the rigidity of the medium. The second shell is farther away, so the light arrives at your eyes noticeably sooner than the sound wave arrives at your ears.Īlthough sound waves in a fluid are longitudinal, sound waves in a solid travel both as longitudinal waves and transverse waves. The first shell is probably very close by, so the speed difference is not noticeable. Sound and light both travel at definite speeds, and the speed of sound is slower than the speed of light. But the music from all instruments arrives in cadence independent of distance, so all frequencies must travel at nearly the same speed. Suppose that high-frequency sounds traveled faster-then the farther you were from the band, the more the sound from the low-pitch instruments would lag that from the high-pitch ones. If this independence were not true, you would certainly notice it for music played by a marching band in a football stadium, for example. This independence is certainly true in open air for sounds in the audible range. One of the more important properties of sound is that its speed is nearly independent of the frequency.
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