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  2. Orders of magnitude (length) - Wikipedia

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

    The megametre (SI symbol: Mm) is a unit of length in the metric system equal to 1 000 000 meters (10 6 m). To help compare different orders of magnitude , this section lists lengths starting at 10 6 m ( 1 Mm or 1,000 km ).

  3. 24-hour clock - Wikipedia

    en.wikipedia.org/wiki/24-hour_clock

    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 ...

  4. Millimetre - Wikipedia

    en.wikipedia.org/wiki/Millimetre

    Different lengths as in respect to the electromagnetic spectrum, measured by the metre and its derived scales.The microwave is between 1 meter to 1 millimeter.. The millimetre (international spelling; SI unit symbol mm) or millimeter (American spelling) is a unit of length in the International System of Units (SI), equal to one thousandth of a metre, which is the SI base unit of length.

  5. Metric time - Wikipedia

    en.wikipedia.org/wiki/Metric_time

    Unix time gives date and time as the number of seconds since January 1, ... 11.6 days (or 11 days, 13 hours, 46 minutes and 40 seconds) 10 9: gigasecond: 1 000 000 000:

  6. Traditional point-size names - Wikipedia

    en.wikipedia.org/wiki/Traditional_point-size_names

    Modern Chinese typography uses the following names in general preference to stating the number of points. In ambiguous contexts, the word hào ( t 號 , s 号 , lit. "number") is added to the end of the size name to clarify the meaning.

  7. List of metric units - Wikipedia

    en.wikipedia.org/wiki/List_of_metric_units

    The basic module (M) is a unit of distance equal to one hundred millimetres (100 mm). The myriametre (mym) is a unit of distance equal to ten kilometres (10 km). The hebdometre is a unit of distance equal to ten megametres (10 Mm). The spat (S) is a unit of distance equal to one terametre (1 Tm).

  8. 6 mm caliber - Wikipedia

    en.wikipedia.org/wiki/6_mm_caliber

    This is a list of firearm cartridges which have bullets of a caliber between 6 millimetres (0.236 in) and 6.99 millimetres (0.275 in). Length refers to the cartridge case length OAL refers to the overall length of the cartridge

  9. Preferred metric sizes - Wikipedia

    en.wikipedia.org/wiki/Preferred_metric_sizes

    A standard metric (concrete) block is 190 mm wide, 390 mm long, and 190 mm high, which allows for 10 mm mortar joints in between bricks, giving a standard unit size of 200 mm square by 400 mm long. [3] A standard metric brick is 90 by 57 by 190 mm; with 10 mm of mortar, that produces a standard unit of 100 mm x 200 mm. [3]