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A change that occurs after a fixed inter...

A change that occurs after a fixed interval of time.

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**Step-by-Step Solution:** 1. **Understanding the Concept**: A change that occurs after a fixed interval of time refers to a type of change that repeats itself at regular intervals. 2. **Definition**: This type of change is known as a "periodic change." 3. **Examples**: - One common example of a periodic change is the rising and setting of the Sun. Every day, the Sun rises in the morning and sets in the evening at regular times. ...
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