Question

A. Fill in the blanks .

List : depth, ultrasonic, amplitude, hertz,
reflection

1. The maximum displacement of a vibrating
body from its mean position is called its
2. The SI unit of frequency is
3. Dolphins use
sound to locate
their prey.
4. The bouncing off of sound energy, on strik-
ing a hard surface, into the same medium
is called
of sound.
5. Sonar is used to determine the
of ocean bed.​

Answer 1

A. Fill in the blanks .

List : depth, ultrasonic, amplitude, hertz,

reflection

Answer:

1. The maximum displacement of a vibrating

body from its mean position is called its - Amplitude

2. The SI unit of frequency is - Hertz

3. Dolphins use ______ sound to locate their prey. - Ultrasound

4. The bouncing off of sound energy, on striking a hard surface, into the same medium is called_______ of sound. - Reflection

5. Sonar is used to determine the______of ocean bed. - Depth