Question

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1. the frequency of a wave is measured in select answer .

Explanation:

In physics (a subfield of Natural Science), the frequency of a wave is defined as the number of oscillations per unit time. The unit for frequency is hertz (Hz), where 1 Hz is equal to 1 cycle per second. This is a fundamental concept in the study of waves (including electromagnetic, sound, etc.) within the domain of physics.

Answer:

hertz (Hz)