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  2. Timeline for the day of the September 11 attacks - Wikipedia

    en.wikipedia.org/wiki/Timeline_for_the_day_of...

    At this time estimate, Flight 11 is about to descend over New York and is just minutes away from crashing. 8:46:40: Flight 11 crashes into the north face of the North Tower (1 WTC) of the World Trade Center, between floors 93 and 99. All passengers aboard are instantly killed with an unknown number inside the building.

  3. Equation of time - Wikipedia

    en.wikipedia.org/wiki/Equation_of_time

    t Y = 365.259 6358 days is the length of time in an anomalistic year: the time interval between two successive passages of the periapsis; λ p = Λ − M, is the ecliptic longitude of the periapsis; t is dynamical time, the independent variable in the theory.

  4. Collapse of the World Trade Center - Wikipedia

    en.wikipedia.org/wiki/Collapse_of_the_World...

    The North Tower (WTC 1) was the first building to be hit when American Airlines Flight 11 crashed into it at 8:46 a.m., [a] causing it to collapse at 10:28 [e] after burning for one hour and 42 minutes. [f] At 9:03 a.m., [g] the South Tower (WTC 2) was struck by United Airlines Flight 175; it collapsed at 9:59 a.m. [h] after burning for 56 minutes.

  5. Calculagraph - Wikipedia

    en.wikipedia.org/wiki/Calculagraph

    The characteristic aspect of the machine's design is its automatic performance of elapsed-time calculations, as calculating the difference between two times manually is a tedious and error-prone process, and the machines quickly gained popularity. Abbott founded the Calculagraph Company in New York City, and later moved to New Jersey. The ...

  6. 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 ...

  7. Half-time - Wikipedia

    en.wikipedia.org/wiki/Half-time

    20 minutes: Two periods (quarters) of 20 minutes plus stoppage time and 15 minutes plus stoppage time (AFL Women's). Bandy: ≤20 minutes [5] 45 minutes plus injury time, replacement time etc. [5] Basketball: 15 minutes: Two periods (quarters) of 10 (FIBA, WNBA, WNBL, NBL, NCAAW) or 12 minutes each or one period (half) of 20 minutes . Canoe ...

  8. Decimal time - Wikipedia

    en.wikipedia.org/wiki/Decimal_time

    The time between each gēng is 1⁄10 of a day, making a gēng 2.4 hours—or 2 hours 24 minutes—long As a 10-part system, the gēng are strongly associated with the 10 celestial stems, especially since the stems are used to count off the gēng during the night in Chinese literature.

  9. Metric time - Wikipedia

    en.wikipedia.org/wiki/Metric_time

    Metric time is the measure of time intervals using the metric system. ... 0.17 minutes 10 2: hectosecond: 100: 1.67 minutes (or 1 minute 40 seconds) 10 3: kilosecond: