If a wave completes 20 vibrations in 2.5 s, then its frequency is

The speed of a wave in a medium is 760 m/s.If 3600 waves are passing through a point in the medium in 21 min, then their wavelength is

Jaltarang is a 

The example of a stringed instrument is 

In a sonar, ultrasonic waves are sent into the sea water and the reflected waves from a sunken ship are received after 2.0 s. If the velocity of waves in sea water is 1450 m/s, find the depth of the sunken ship.

Which kind of sound is produced in an earthquake before the main shock wave begins?

Sound waves travel with a speed of 346 m/s in air. What is the wavelength of sound whose frequency is 692 Hz?

One of the following can hear infrasound. This one is

Sound is a form of

A bat can hear sound at frequency up to 120 kHz. Determine the wavelength of sound in air at this frequency. Take the speed of sound in air to be 344 m/s.