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  2. 24-hour clock - Wikipedia

    en.wikipedia.org/wiki/24-hour_clock

    24-hour digital clock in Miaoli HSR station.. A time of day is written in the 24-hour notation in the form hh:mm (for example 01:23) or hh:mm:ss (for example, 01:23:45), where hh (00 to 23) is the number of full hours that have passed since midnight, mm (00 to 59) is the number of full minutes that have passed since the last full hour, and ss (00 to 59) is the number of seconds since the last ...

  3. Military time zone - Wikipedia

    en.wikipedia.org/wiki/Military_time_zone

    The Zulu time zone (Z) is equivalent to Coordinated Universal Time (UTC) and is often referred to as the military time zone. The military time zone system ensures clear communication in a concise manner, and avoids confusion when coordinating across time zones. The CCEB, representing the armed forces of Australia, Canada, New Zealand, the ...

  4. Circular error probable - Wikipedia

    en.wikipedia.org/wiki/Circular_error_probable

    Munitions may also have larger standard deviation of range errors than the standard deviation of azimuth (deflection) errors, resulting in an elliptical confidence region. Munition samples may not be exactly on target, that is, the mean vector will not be (0,0). This is referred to as bias.

  5. Coordinated Universal Time - Wikipedia

    en.wikipedia.org/wiki/Coordinated_Universal_Time

    Coordinated Universal Time ( UTC) is the primary time standard globally used to regulate clocks and time. It establishes a reference for the current time, forming the basis for civil time and time zones. UTC facilitates international communication, navigation, scientific research, and commerce. UTC has been widely embraced by most countries and ...

  6. 1:64 scale - Wikipedia

    en.wikipedia.org/wiki/1:64_scale

    The 1:64 scale is a traditional scale for models and miniatures, in which one unit (such as an inch or a centimeter) on the model represents 64 units on the actual object. It is also known as the "three-sixteenths scale" since 3/16 of an inch represents one foot. An average human is approximately inches (27 mm) tall when represented in 1:64 scale.

  7. Frequency allocation - Wikipedia

    en.wikipedia.org/wiki/Frequency_allocation

    Frequency allocation (or spectrum allocation) is the part of spectrum management dealing with the designation and regulation of the electromagnetic spectrum into frequency bands, normally done by governments in most countries. [1] Because radio propagation does not stop at national boundaries, governments have sought to harmonise the allocation ...

  8. Orders of magnitude (length) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(length)

    Conversions. 10 centimetres (abbreviated to 10 cm) is equal to: 1 decimetre (dm), a term not in common use (1 L = 1 dm 3.) 100 millimetres; 3.9 inches; a side of a square of area 0.01 m 2; the edge of a cube with a volume of 1 × 10 −3 m 3 (1 L) Wavelengths. 10 cm = 1.0 dm – wavelength of the highest UHF radio frequency, 3 GHz

  9. History of the SAT - Wikipedia

    en.wikipedia.org/wiki/History_of_the_SAT

    The SAT is a standardized test commonly used for the purpose of admission to colleges and universities in the United States. The test, owned by the College Board and originally developed by Carl Brigham, was first administered on June 23, 1926, to about 8,000 students. The test was introduced as a supplement to the College Board essay exams ...