1.

The number of oscillation per second of a vibrating object is called it's time period

Answer»

Answer:

The number of oscillations per second of a vibrating OBJECT is known as its frequency. Time period is the time REQUIRED to complete ONE OSCILLATION. Loudness of a sound is proportional to the square of the amplitude of its VIBRATION. When the amplitude of vibration of a sound is large, the sound is very loud.

Explanation:

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