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  2. Minute and second of arc - Wikipedia

    en.wikipedia.org/wiki/Minute_and_second_of_arc

    [9] [failed verification] Each degree was subdivided into 60 minutes and each minute into 60 seconds. [10] [11] Thus, one Babylonian degree was equal to four minutes in modern terminology, one Babylonian minute to four modern seconds, and one Babylonian second to ⁠ 1 / 15 ⁠ (approximately 0.067) of a modern second.

  3. Millisecond - Wikipedia

    en.wikipedia.org/wiki/Millisecond

    20 milliseconds – cycle time for European 50 Hz AC electricity; 31.25 milliseconds – a hundred twenty-eighth note at 60 BPM; 33.367 milliseconds – the amount of time one frame lasts in 29.97 fps video (most common for NTSC-legacy formats) 41.667 milliseconds – the amount of time one frame lasts in 24 fps video (most common cinematic ...

  4. Rule of twelfths - Wikipedia

    en.wikipedia.org/wiki/Rule_of_twelfths

    In the third hour the water level would rise by another 3 twelfths of the total (12 m) or: 3 m; This gives the increase in the water level by 3:00 p.m. as 6 metres. This represents only the increase - the total depth of the water (relative to chart datum) will include the 2 m depth at low tide: 6 m + 2 m = 8 metres.

  5. Equation of time - Wikipedia

    en.wikipedia.org/wiki/Equation_of_time

    From 1767 to 1833, the British Nautical Almanac and Astronomical Ephemeris tabulated the equation of time in the sense 'add or subtract (as directed) the number of minutes and seconds stated to or from the apparent time to obtain the mean time'. Times in the Almanac were in apparent solar time, because time aboard ship was most often determined ...

  6. Erlang (unit) - Wikipedia

    en.wikipedia.org/wiki/Erlang_(unit)

    provided that h and λ are expressed using the same units of time (seconds and calls per second, or minutes and calls per minute). The practical measurement of traffic is typically based on continuous observations over several days or weeks, during which the instantaneous traffic is recorded at regular, short intervals (such as every few seconds).

  7. Big Bang nucleosynthesis - Wikipedia

    en.wikipedia.org/wiki/Big_Bang_nucleosynthesis

    This type of nucleosynthesis is thought by most cosmologists to have occurred from 10 seconds to 20 minutes after the Big Bang. [2] It is thought to be responsible for the formation of most of the universe's helium (as isotope helium-4 ( 4 He)), along with small fractions of the hydrogen isotope deuterium ( 2 H or D), the helium isotope helium ...

  8. Equianalgesic - Wikipedia

    en.wikipedia.org/wiki/Equianalgesic

    An equianalgesic chart is a conversion chart that lists equivalent doses of analgesics ... 5–10 seconds if used IV and 15-25 ... 45–60 minutes 12–24 hours 14 ...

  9. Exposure value - Wikipedia

    en.wikipedia.org/wiki/Exposure_value

    t is the exposure time ("shutter speed") in seconds [2] The second line is just applying the quotient identity of logarithms to the first line. EV 0 corresponds to an exposure time of 1 s and an aperture of f /1.0. If the EV is known, it can be used to select combinations of exposure time and f-number, as shown in Table 1.