The number of vibrations/oscillations executed per second is known as

Frequency

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Amplitude

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Pitch

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Wavelength

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Solution

The correct option is A
Frequency

Frequency:
The frequency of a repeating event is the number of occurrences per unit of time.
It is also known as temporal frequency to distinguish it from spatial frequency and ordinary frequency to distinguish it from angular frequency.
The frequency of a wave tells us how many wave crests pass through a given point in a second.
Hence, Option(A) is correct.

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