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1.0 in (25 mm) in cm; in mm; Maritime units: nautical mile: nmi nmi the international standard nautical mile 1.0 nmi (1.9 km; 1.2 mi) nautical mile: oldUKnmi (admiralty nmi) nmi 6080 ft the pre-1970 British nautical mile: 1.0 nmi (1.9 km; 1.2 mi) Brnmi (Brit) nmi admi nmi (admiralty) nautical mile: oldUSnmi nmi 6080.2 ft the pre-1954 US ...
The measurement refers to the traditional size of a Japanese flooring mat called a Tatami mat (made of woven dried grass) which were positioned to completely cover the floor of traditional Japanese homes, therefore it became a convenient measurement tool as mat area was standardised hundreds of years ago.
In Japan, a traditional reed mat is the tatami (畳). Tatami are covered with a weft-faced weave of soft rush ( 藺草 , igusa ) ( common rush ), on a warp of hemp or weaker cotton. There are four warps per weft shed , two at each end (or sometimes two per shed, one at each end, to cut costs).
The traditional units are still used for construction materials in Japan. For example, plywood is usually manufactured in 182 cm × 91 cm (about 72 in × 36 in) sheets known in the trade as saburokuhan (3 × 6版), or 3 × 6 shaku. Each sheet is about the size of one tatami mat. The thicknesses of the sheets, however, are usually measured in ...
In 1976 the Hong Kong Metrication Ordinance allowed a gradual replacement of the system in favor of the International System of Units (SI) metric system. [6] The Weights and Measures Ordinance defines the metric, Imperial, and Chinese units. [7] As of 2012, all three systems are legal for trade and are in widespread use.
A half mat is called a hanjō (半畳), and a mat of three-quarter length is called a daimedatami (大目畳 or 台目畳), which is used in tea-ceremony rooms . [ 4 ] In Japan, the size of a room is usually measured in relation to the size of tatami mats ( -畳 , -jō ) , about 1.653 m 2 (17.79 sq ft) for a standard Nagoya-size tatami.
For example, the CGS unit of force is the dyne, which is defined as 1 g⋅cm/s 2, so the SI unit of force, the newton (1 kg⋅m/s 2), is equal to 100 000 dynes. On the other hand, in measurements of electromagnetic phenomena (involving units of charge , electric and magnetic fields, voltage , and so on), converting between CGS and SI is less ...
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.