Which of the following is/are application(s) of Ultrasonic waves?

All of these

Ultrasonic waves: The longitudinal mechanical waves having frequencies greater than 2000 Hz are called ultrasonic waves. Human ear cannot detect these waves. But certain creatures like dog, cat, bat, mosquito can detect these waves.

Applications of Ultrasonic waves:

1. For sending signals

2. For measuring the depth of sea

3. For cleaning cloths, airplanes and machinery parts of clocks.

4. For removing lamp-shoot from the chimney of factories.

5. In sterilizing of a liquid.

6. In Ultrasonography.