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  2. Ahmed Mohamed clock incident - Wikipedia

    en.wikipedia.org/wiki/Ahmed_Mohamed_clock_incident

    On September 14, 2015, 14-year-old Ahmed Mohamed was arrested at MacArthur High School in Irving, Texas, for bringing a disassembled digital clock to school. The incident ignited allegations of racial profiling and Islamophobia from many media sources and commentators. The episode arose when Mohamed reassembled the parts of a digital clock in ...

  3. Pencil detonator - Wikipedia

    en.wikipedia.org/wiki/Pencil_detonator

    Pencil detonator. A pencil detonator or time pencil is a time fuze designed to be connected to a detonator or short length of safety fuse. They are about the same size and shape as a pencil, hence the name. They were introduced during World War II and developed at Aston House, Hertfordshire, UK.

  4. Time bomb - Wikipedia

    en.wikipedia.org/wiki/Time_bomb

    A time bomb (or a timebomb, time-bomb) is a bomb whose detonation is triggered by a timer. The use or attempted use of time bombs has been for various purposes including insurance fraud, terrorism, assassination, sabotage and warfare. They are a frequent plot device in thriller and action films as they offer a way of imparting a dramatic sense ...

  5. Timer - Wikipedia

    en.wikipedia.org/wiki/Timer

    A timer or countdown timer is a type of clock that starts from a specified time duration and stops upon reaching 00:00. An example of a simple timer is an hourglass. Commonly, a timer triggers an alarm when it ends. A timer can be implemented through hardware or software. Stopwatches operate in the opposite direction, upwards from 00:00 ...

  6. Duck and cover - Wikipedia

    en.wikipedia.org/wiki/Duck_and_cover

    An accurate rule of thumb, applicable in the time-period of days to a few weeks post-detonation which approximates the radioactive dose rate generated by the decay of the myriad of isotopes present in nuclear fallout, is the "7/10 rule". [133] [105] The rule states that for each 7-fold increase in time the dose rate drops by a factor of 10. [134]

  7. Pomodoro Technique - Wikipedia

    en.wikipedia.org/wiki/Pomodoro_Technique

    Pomodoro Technique. A pomodoro kitchen timer. The Pomodoro Technique is a time management method developed by Francesco Cirillo in the late 1980s. [1] It uses a kitchen timer to break work into intervals, typically 25 minutes in length, separated by short breaks. Each interval is known as a pomodoro, from the Italian word for tomato, after the ...

  8. Countdown - Wikipedia

    en.wikipedia.org/wiki/Countdown

    A countdown is a carefully devised set of procedures ending with launch of a rocket. Depending on the type of vehicle used, countdowns can start from 72 to 96 hours before launch time. There are two countdowns proceeding simultaneously: The T-minus clock, a schedule of planned activities prior to launch (T−0), and.

  9. 1986 Cokeville Elementary School hostage crisis - Wikipedia

    en.wikipedia.org/wiki/1986_Cokeville_Elementary...

    The Cokeville Elementary School hostage crisis occurred on Friday, May 16, 1986 in Cokeville, Wyoming, United States, when former town marshal David Young, 43, and his wife Doris Young, 47, [1] took 154 hostages – 136 children and 18 adults – at Cokeville Elementary School. Transporting ten firearms and an improvised gasoline bomb, the ...

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