The mathematical symbol for period is
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The mathematical symbol for period is T

Explanation:

Period is the time taken for an object to complete a full cycle or revolution. Period is mathematically represented by the letter T, and is measured in seconds.

the  frequency of a wave represents  the number of wavelengths that pass a specific point per second. the unit for  frequency  is hertz (hz).

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evidence and logical support is essential for a scientist to do in order to maintain credibility. this is because no one can believe without any logic and without any evidence.hence a scientist can maintain credibility by proving himself and by answering logically so experiments prove very beneficial. logical hypothesis give conclusion which is acceptable. therefore, there are two main factors to maintain credibility by a scientist is evidence and logical support.