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  2. 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 .

  3. Wavenumber - Wikipedia

    en.wikipedia.org/wiki/Wavenumber

    In the physical sciences, the wavenumber (or wave number), also known as repetency, [1] is the spatial frequency of a wave. Ordinary wavenumber is defined as the number of wave cycles divided by length; it is a physical quantity with dimension of reciprocal length , expressed in SI units of cycles per metre or reciprocal metre (m -1 ).

  4. 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]

  5. False Spring? A February 'Heat Wave' Is Smashing ... - AOL

    www.aol.com/news/false-spring-february-heat-wave...

    Lubbock, Texas, not only tied their February record Monday (91 degrees), but it was also nine days earlier than their previous record earliest high in the 90s in any year (Feb. 12, 2017).

  6. Tornado causes havoc in Texas as record-breaking heat wave looms

    www.aol.com/news/tornado-causes-havoc-texas...

    The destructive weather comes as Texas faces a heat wave that could break 100-year-old records: the National Weather Service said the south of the state could see temperatures of more than 115 ...

  7. Wave - Wikipedia

    en.wikipedia.org/wiki/Wave

    In representing the wave function of a localized particle, the wave packet is often taken to have a Gaussian shape and is called a Gaussian wave packet. [25] [26] [27] Gaussian wave packets also are used to analyze water waves. [28] For example, a Gaussian wavefunction ψ might take the form: [29]

  8. 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 ...

  9. Sea state - Wikipedia

    en.wikipedia.org/wiki/Sea_state

    The significant wave height H 1/3 — the mean wave height of the highest third of the waves. The mean wave period, T 1. In addition to the short-term wave statistics presented above, long-term sea state statistics are often given as a joint frequency table of the significant wave height and the mean wave period.