<p align="right">Last Update: <font color="#4f81bd">January 02, 2025</font></p> ## BIG IDEAS - Sound waves are longitudinal mechanical waves that can travel through gases, liquids, and solids. - Sound cannot travel through a vacuum. ---- ### Symbol $v \tag{1}$ ### SI Unit $m/s \tag{2}$ The velocity of sound ($v$) the air depends on the temperature of the air. - Sound waves increase in speed with an increase in temperature. - Sound travels faster in dense medium. The speed of sound depends on the medium. In air, the speed of sound is 331 m/s. In contrast, in a vacuum, the speed of sound is zero m/s. The speed of sound also depends on the temperature. Sound travels at 343 m/s at sea level and 20° C. The speed increases about 0.6 m/s for each degree Celsius. - Air -> 340 m/s - Water -> 1500 m/s - Glass -> 5000 m/s - Steel -> 5940 m/s ### Slide Deck <div style="position: relative; width: 100%; height: 0; padding-top: 56.2500%; padding-bottom: 0; box-shadow: 0 2px 8px 0 rgba(63,69,81,0.16); margin-top: 1.6em; margin-bottom: 0.9em; overflow: hidden; border-radius: 8px; will-change: transform;"> <iframe loading="lazy" style="position: absolute; width: 100%; height: 100%; top: 0; left: 0; border: none; padding: 0;margin: 0;" src="https://www.canva.com/design/DAGPwCEgHkE/5JVyDtIS6rkErhOp-XYu7A/view?embed" allowfullscreen="allowfullscreen" allow="fullscreen"> </iframe> </div> ### Related Topics --- [[Home|Home]] | [[Oscillations]] | [[Waves]] | [[Module 0 Sound]] | [[Module 1 Sound Waves]] | [[Module 2 Speed of Sound]] | [[Module 3 Sound Intensity]] | [[Module 4 Doppler Effect]] | [[Electromagnetic radiation]]