Final answer:
The term to describe the number of repeated events within a specific time period is 'frequency', which in the context of wave motion, is also used to describe the cycle rate of positive and negative amplitude.
Step-by-step explanation:
The term used to describe the number of repeated events within a specific time period in physics is frequency. The frequency of an event is defined as the number of occurrences of that event per unit of time. When discussing periodic motion, such as the oscillation of a wave, frequency is the number of oscillations that occur in one second.
In the context of wave motion, the term used to describe the rate at which a device or a signal repeats a cycle of positive and negative amplitude is again, frequency. The reciprocal of frequency is the period, which is the time it takes to complete one full oscillation or cycle. The reciprocal of frequency is 'period,' indicating the time for one full cycle.
The term used to describe the number of repeated events within a specific time period is called frequency. Frequency is defined as the number of complete wave cycles passing a given point within one second. It is measured in hertz (Hz).
The term used to describe the rate at which a device or signal repeats a cycle of positive and negative amplitude is called frequency. In the context of waves, frequency refers to the number of oscillations per unit time.