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  2. Counts per minute - Wikipedia

    en.wikipedia.org/wiki/Counts_per_minute

    Counts per minute (abbreviated to cpm) is a measure of the detection rate of ionization events per minute. Counts are only manifested in the reading of the measuring instrument, and are not an absolute measure of the strength of the source of radiation. Whilst an instrument will display a rate of cpm, it does not have to detect counts for one ...

  3. Minute and second of arc - Wikipedia

    en.wikipedia.org/wiki/Minute_and_second_of_arc

    A minute of arc is π10 800 of a radian . A second of arc, arcsecond (arcsec), or arc second, denoted by the symbol ″, [2] is 1 60 of an arcminute, 1 3600 of a degree, [1] 1 1 296 000 of a turn, and π648 000 (about 1 206 264.8) of a radian. These units originated in Babylonian astronomy as sexagesimal (base 60) subdivisions of the degree ...

  4. Actions per minute - Wikipedia

    en.wikipedia.org/wiki/Actions_per_minute

    Actions per minute, abbreviated to APM, is a term used in video games, particularly real-time strategy and fighting games which refers to the total number of actions that a player can perform in a minute. Actions per minute are the number of actions (such as selecting units or issuing an order) completed within a minute of gameplay in real-time ...

  5. Metronome - Wikipedia

    en.wikipedia.org/wiki/Metronome

    A wind-up mechanical metronome, Nikko model, clicking at 96 BPM. A metronome (from Greek μέτρον (métron) 'measure', and νομός (nomós) 'law') is a device that produces an audible click or other sound at a uniform interval that can be set by the user, typically in beats per minute (BPM). Metronomes may also include synchronized ...

  6. Play clock - Wikipedia

    en.wikipedia.org/wiki/Play_clock

    A play clock, also called a delay-of-game timer, is a countdown clock intended to speed up the pace of the game in gridiron football.The offensive team must put the ball in play by either snapping the ball during a scrimmage down or kicking the ball during a free kick down before the time expires, or else they will be assessed a 5-yard delay of game (American football) or time count violation ...

  7. Frequency - Wikipedia

    en.wikipedia.org/wiki/Frequency

    T − 1 {\displaystyle {\mathsf {T}}^ {-1}} Frequency (symbol f ), most often measured in hertz (symbol: Hz), is the number of occurrences of a repeating event per unit of time. [1] It is also occasionally referred to as temporal frequency for clarity and to distinguish it from spatial frequency. Ordinary frequency is related to angular ...

  8. Clock face - Wikipedia

    en.wikipedia.org/wiki/Clock_face

    A long minute hand makes one revolution every hour. The face may also include a second hand, which makes one revolution per minute. The term is less commonly used for the time display on digital clocks and watches. A second type of clock face is the 24-hour analog dial, widely used in military and other organizations that use 24-hour time. This ...

  9. Cycle per second - Wikipedia

    en.wikipedia.org/wiki/Cycle_per_second

    1 Hz=1 s −1. The cycle per second is a once-common English name for the unit of frequency now known as the hertz (Hz). Cycles per second may be denoted by c.p.s., c/s, or, ambiguously, just "cycles" (Cyc., Cy., C, or c). The term comes from repetitive phenomena such as sound waves having a frequency measurable as a number of oscillations, or ...