Question

properties of ultrasonics​

Answer 1

Answer:

The ultrasonic waves cannot travel through vacuum.

These waves travel with speed of sound in a given medium.

Their velocity remains constant in homogeneous media.

These waves can weld certain plastics, metals etc.

These can produce vibrations in low viscosity liquids.

Answer 2

Answer:

the sound waves which we can hear with our ears and are specially used by the bats to communicate each other and it is used in many more things like x Ray's machine , to remove the dirt from machine etc.