An echo is heard after 5 seconds of the production of sound which moves with a speed of 340 m/s. What is the distance of the mountain from the source of sound which produced the echo?

A sound wave travelling at a speed of 330 m/s produces 20 crests and 20 troughs in 0.1 second. The wavelength (λ) of the sound wave is:

Sonic boom is produced when a source of sound travels at a speed :

When the same tone is played on a sitar and a fute, the sound produced can be distinguished from each other because of the diference in :

How much should minimum distance be between the source of sound and reflecting surface, so that an echo can be heard clearly?

The speed of sound is highest in which of these mediums?