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  2. Periodic function - Wikipedia

    en.wikipedia.org/wiki/Periodic_function

    An illustration of a periodic function with period . A periodic function, also called a periodic waveform (or simply periodic wave), is a function that repeats its values at regular intervals or periods. The repeatable part of the function or waveform is called a cycle. [1]

  3. Cold wave - Wikipedia

    en.wikipedia.org/wiki/Cold_wave

    This minimum temperature is dependent on the geographical region and time of year. [1] In the United States, a cold spell is defined as the national average high temperature dropping below 20 °F (−7 °C). [2] A cold wave of sufficient magnitude and duration may be classified as a cold air outbreak (CAO). [3] [4]

  4. Unit of time - Wikipedia

    en.wikipedia.org/wiki/Unit_of_time

    Used to measure the time between alternating power cycles. Also a casual term for a short period of time. centisecond: 10 −2 s: One hundredth of a second. decisecond: 10 −1 s: One tenth of a second. second: 1 s: SI base unit for time. decasecond: 10 s: Ten seconds (one sixth of a minute) minute: 60 s: hectosecond: 100 s: milliday: 1/1000 d ...

  5. It's the longest day of the year! Here's 25+ Texas things to ...

    www.aol.com/longest-day-heres-25-texas-151921814...

    When is sunset in Texas? Sunset times vary across the state. But from East Texas to West Texas, it ranges between 8:29 p.m. and 9:01 p.m. More: Is Beavis and Butt-Head based in Texas? Mike Judge ...

  6. Heat wave or heat dome? Yes, there's a difference - AOL

    www.aol.com/news/heat-wave-heat-dome-yes...

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  7. Frequency - Wikipedia

    en.wikipedia.org/wiki/Frequency

    The period (symbol T) is the interval of time between events, so the period is the reciprocal of the frequency: T = 1/f. [ 2 ] Frequency is an important parameter used in science and engineering to specify the rate of oscillatory and vibratory phenomena, such as mechanical vibrations, audio signals ( sound ), radio waves , and light .

  8. Phase (waves) - Wikipedia

    en.wikipedia.org/wiki/Phase_(waves)

    When two signals with these waveforms, same period, and opposite phases are added together, the sum + is either identically zero, or is a sinusoidal signal with the same period and phase, whose amplitude is the difference of the original amplitudes. The phase shift of the co-sine function relative to the sine function is +90°.

  9. In 12 years Texas will be hotter than any year to date, see ...

    www.aol.com/12-years-texas-hotter-date-202500881...

    The report from John Nielsen-Gammon, Texas State Climatologist at Texas A&M University, is an updated 2024 version from his original 2021 report titled, “Assessment of Historic and Future Trends ...