Which of the following is true about sound? a) Sound waves cannot travel through solid objects like metals, as they are vibrations. b) Sound waves travel through empty space in the same manner as they travel in air c) Sound is emitted because of vibrations and it moves between the particles of air to reach our ears. d) The sound itself is a vibration, it travels through the air as vibrations and is received by the ear as vibrations
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number b is true about the sound
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Sound is produced when the particles in any medium produces vibration and thus reach our ears. (Option C)
- Sound can travel through solids, liquids and gases (air). The speed of sound is fastest in solids, then in liquids and at last gases.
- This is because particles in solids are tightly packed with each other and make the speed of sound the maximum in them.
- Sound is a longitudinal wave. And it requires a medium to travel. Hence, it cannot travel in space and in vacuum.
- Sound is not vibration itself. Rather sound is produced due to the vibration of the tiny particles present in the medium.
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