CBSE - Sound and Wave

Earthquake waves are of which type? (1) Infrasonic (2) Ultrasonic (3) Supersonic (4) Intrasonic

In air the speed of sound is 340 m/s. This means that in one second : (1) Sound source moves 340 m (2) Listener moves 340 m (3) Air disturbance moves 340 m (4) Air moves 340 m

A sound wave has a frequency of 2 kHz and wavelength 35 cm. How much distance it will travel in 2 second (1) 14 m (2) 14 m (3) 140 m (4) 1400 m

Velocity of sound is maximum in - (1) Water (2) Oil (3) Air (4) Iron

The unit of frequency is - (1) Hertz (2) Joule (3) Ohm (4) Kilo Calorie