LEARNATHON
III

Competition for grade 6 to 10 students! Learn, solve tests and earn prizes!

Sound travels at a finite speed through a medium. The sound of thunder arrives a few seconds after the flash of light. As a result, we can deduce that sound travels at a much slower rate than light. The properties of the medium through which sound travels determine its speed. In a gaseous medium, sound travels slower than in a solid medium. When the temperature of a medium is increased, the speed of sound increases. The speed of sound in air, for example, is $$330$$ $m/s$ at $$0$$ $$°C$$ and $$340$$ $m/s$ at $$25$$ $$°C$$.
The above table shows the sound speed in various media at $$25$$$$° C$$.
Sound travels about five times faster in water than in air. Since the speed of sound in seawater is very large (being about $$1530$$ $m/s$, which is more than $$5500$$ $$km/h$$), two whales in the sea, which are even hundreds of kilometres away, can talk to each other very easily through the seawater.