What is the range of frequencies associated with:
$(a)$ Infrasound?
$(b)$ Ultrasound?

An echo is heard in $3 \,s$. What is the distance of the reflecting surface from the source,given that the speed of sound is $342 \,m \,s^{-1}$ (in $,m$)?

Two children are at opposite ends of an aluminium rod. One strikes the end of the rod with a stone. Find the ratio of times taken by the sound wave in air and in aluminium to reach the second child.

What is the audible range of the average human ear?

In which of the three media,air,water,or iron,does sound travel the fastest at a particular temperature?

$A$ sonar device on a submarine sends out a signal and receives an echo $5\, s$ later. Calculate the speed of sound in water if the distance of the object from the submarine is $3625\, m$. (in $, m/s$)