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  2. Yo-Yo intermittent test - Wikipedia

    en.wikipedia.org/wiki/Yo-Yo_intermittent_test

    Note: A circuit consists of running two shuttles followed by a 10 second rest period Table derived from "The Yo-Yo Intermittent Tests: A Systematic Review and Structured Compendium of Test Results" [4] and ESPNCricinfo [6] As a side note, "Speed Level" correlates exactly with "Running Speed (km/h)" using the formula: (Running Speed – 7.5) * 2.

  3. Radio frequency - Wikipedia

    en.wikipedia.org/wiki/Radio_frequency

    Radio frequency. Radio frequency (RF) is the oscillation rate of an alternating electric current or voltage or of a magnetic, electric or electromagnetic field or mechanical system in the frequency [1] range from around 20 kHz to around 300 GHz. This is roughly between the upper limit of audio frequencies and the lower limit of infrared ...

  4. Radio-frequency sweep - Wikipedia

    en.wikipedia.org/wiki/Radio-frequency_sweep

    A spectrum analyzer is a standard instrument used for RF sweep. It includes an electronically tunable receiver and a display. The display presents measured power (y axis) vs frequency (x axis). The power spectrum display is a two-dimensional display of measured power vs. frequency. The power may be either in linear units, or logarithmic units ...

  5. Speedtest.net - Wikipedia

    en.wikipedia.org/wiki/Speedtest.net

    Speedtest.net. Speedtest.net, also known as Speedtest by Ookla, is a web service that provides free analysis of Internet access performance metrics, such as connection data rate and latency. It is the flagship product of Ookla, a web testing and network diagnostics company founded in 2006, and based in Seattle, Washington, United States. [5][6]

  6. Charter rolls out new Spectrum pricing and internet speeds ...

    www.aol.com/news/charter-rolls-spectrum-pricing...

    Charter rolls out new Spectrum pricing and internet speeds, aims to 'be a better service operator'. Lillian Rizzo, CNBC. September 16, 2024 at 4:46 PM. Spectrum said it will charge as low as $30 a ...

  7. Audio frequency - Wikipedia

    en.wikipedia.org/wiki/Audio_frequency

    t. e. An audio frequency or audible frequency (AF) is a periodic vibration whose frequency is audible to the average human. The SI unit of frequency is the hertz (Hz). It is the property of sound that most determines pitch. [1] The generally accepted standard hearing range for humans is 20 to 20,000 Hz. [2][3][4] In air at atmospheric pressure ...

  8. Mass spectrometry - Wikipedia

    en.wikipedia.org/wiki/Mass_spectrometry

    Mass spectrometry. Mass spectrometry (MS) is an analytical technique that is used to measure the mass-to-charge ratio of ions. The results are presented as a mass spectrum, a plot of intensity as a function of the mass-to-charge ratio. Mass spectrometry is used in many different fields and is applied to pure samples as well as complex mixtures.

  9. Radio spectrum - Wikipedia

    en.wikipedia.org/wiki/Radio_spectrum

    The radio spectrum is the part of the electromagnetic spectrum with frequencies from 3 Hz to 3,000 GHz (3 THz). Electromagnetic waves in this frequency range, called radio waves, are widely used in modern technology, particularly in telecommunication. To prevent interference between different users, the generation and transmission of radio ...

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