stationary observer at a speed of ms – . The frequency heard by the observer is (speed of sound = ms – ) . . A source of sound is travelling with a velocity km/h towards an observer and emits a sound of frequency Hz.
If the velocity of sound is km/h, then the apparent frequency heard by the observer is . III. True or false:- (If false give the reason) . Sound can travel through solids, gases, liquids and even vacuum.
. Waves created by Earth Quake are Infrasonic. . The velocity of sound is independent of temperature.
. The Velocity of sound is high in gases than liquids. IV. Match the following .
Infrasonic - (a) Compressions . Echo - (b) kHz . Ultrasonic - (c) Hz . High pressure region - (d) Ultrasonography Acoustics V.
Assertion and Reason Questions Mark the correct choice as