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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. Lake retention time - Wikipedia

    en.wikipedia.org/wiki/Lake_retention_time

    The lake retention time for a body of water with the volume 2,000 m 3 (71,000 cu ft) and the exit flow of 100 m 3 /h (3,500 cu ft/h) is 20 hours.. Lake retention time (also called the residence time of lake water, or the water age or flushing time) is a calculated quantity expressing the mean time that water (or some dissolved substance) spends in a particular lake.

  4. Time in physics - Wikipedia

    en.wikipedia.org/wiki/Time_in_physics

    In the International System of Units (SI), the unit of time is the second (symbol: s). It has been defined since 1967 as "the duration of 9 192 631 770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium 133 atom", and is an SI base unit. [12]

  5. Water clock - Wikipedia

    en.wikipedia.org/wiki/Water_clock

    To make it keep time within one minute per day would require its temperature to be controlled within 1 ⁄ 30 °C (about 1 ⁄ 17 °F). There is no evidence that this was done in antiquity, so ancient water clocks with sufficiently thin and long nozzles (unlike the modern pendulum-controlled one described above) cannot have been reliably ...

  6. Time of concentration - Wikipedia

    en.wikipedia.org/wiki/Time_of_concentration

    Time of concentration is a concept used in hydrology to measure the response of a watershed to a rain event. It is defined as the time needed for water to flow from the most remote point in a watershed to the watershed outlet. [1] It is a function of the topography, geology, and land use within the watershed.

  7. What is the time value of money? - AOL

    www.aol.com/finance/time-value-money-204611483.html

    The time value of money concept is all about how money is worth more now than in the future because of its potential growth and ... 60- or 90-day credit term for the sale of products or services. ...

  8. Time - Wikipedia

    en.wikipedia.org/wiki/Time

    Time is the continuous progression of existence that occurs in an apparently irreversible succession from the past, through the present, and into the future. [1] [2] [3] It is a component quantity of various measurements used to sequence events, to compare the duration of events (or the intervals between them), and to quantify rates of change of quantities in material reality or in the ...

  9. 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.