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  2. Unit of time - Wikipedia

    en.wikipedia.org/wiki/Unit_of_time

    The Jiffy is the amount of time light takes to travel one femtometre (about the diameter of a nucleon). The Planck time is the time that light takes to travel one Planck length. The TU (for time unit) is a unit of time defined as 1024 μs for use in engineering. The svedberg is a time unit used for sedimentation rates (usually

  3. Sidereal time - Wikipedia

    en.wikipedia.org/wiki/Sidereal_time

    A mean solar day (what we normally measure as a "day") is the average time between local solar noons ("average" since this varies slightly over a year). Earth makes one rotation around its axis each sidereal day; during that time it moves a short distance (about 1°) along its orbit around the Sun.

  4. Hydra vulgaris - Wikipedia

    en.wikipedia.org/wiki/Hydra_vulgaris

    Hydra oligactis. This species can reproduce in three ways: sexual reproduction, budding, and indirectly through regeneration. [11] When hydra reproduce sexually, simple testes, ovaries, or both will develop on the bodies of an individual. Sperm released into the environment by the testes enters the egg within the ovary.

  5. Hydroplane (boat) - Wikipedia

    en.wikipedia.org/wiki/Hydroplane_(boat)

    That day the No-Vac set the world water speed record for an outboard powered boat of 78 miles per hour (126 km/h). The basic hull design of most hydroplanes has remained relatively unchanged since the 1950s: two sponsons in front, one on each side of the bow; behind the wide bow , is a narrower, mostly rectangular section housing the driver ...

  6. Moment (unit) - Wikipedia

    en.wikipedia.org/wiki/Moment_(unit)

    The day is divided into 24 hours, and each hour into 4 puncta, 10 minuta, or 40 momenta. Similarly, the week is divided into seven days, and each day into 96 puncta , 240 minuta , or 960 momenta . A moment ( momentum ) is a medieval unit of time .

  7. Water cycle - Wikipedia

    en.wikipedia.org/wiki/Water_cycle

    The residence time of a reservoir within the hydrologic cycle is the average time a water molecule will spend in that reservoir (see table). It is a measure of the average age of the water in that reservoir. Groundwater can spend over 10,000 years beneath Earth's surface before leaving. [17] Particularly old groundwater is called fossil water ...

  8. Hydra: The Greek island of calm where cars are banned and ...

    www.aol.com/hydra-greek-island-calm-where...

    Jarman’s connection with Hydra began 24 years ago when her mother brought her to the island on vacation, leading to a life-changing decision to make Hydra their permanent home.

  9. Run chart - Wikipedia

    en.wikipedia.org/wiki/Run_chart

    A simple run chart showing data collected over time. The median of the observed data (73) is also shown on the chart. A run chart, also known as a run-sequence plot is a graph that displays observed data in a time sequence. Often, the data displayed represent some aspect of the output or performance of a manufacturing or other business process.