Question

A body produces sound only if it is

• A. made of steel
• B. made of glass
• C. touched
• D. vibrating

Answer 1

The correct option is D

vibrating

The explanation for the correct option:

1. Whenever an object vibrates, it will create a pressure wave. When particle vibrates they will moves to the nearby particles, transmitting the sound further through the medium. which creates the sound
2. We can hear a sound wave when the air particles vibrate small parts within the ear.
3. Thus we can hear if the molecules of the medium get vibrate.

The explanation for the incorrect options:

1. The production of sound does not depend on the material of the body or when the body is being touched.

Hence, option (d) is correct.