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U.S. customary. ≈ 0.444 44 psi. The metre (or meter) sea water ( msw) is a metric unit of pressure used in underwater diving. It is defined as one tenth of a bar. [ 1][ 2] The unit used in the US is the foot sea water ( fsw ), based on standard gravity and a sea-water density of 64 lb/ft 3. According to the US Navy Diving Manual, one fsw ...
A nautical mile is a unit of length used in air, marine, and space navigation, and for the definition of territorial waters. [2] [3] [4] Historically, it was defined as the meridian arc length corresponding to one minute ( 1 / 60 of a degree) of latitude at the equator, so that Earth's polar circumference is very near to 21,600 nautical miles (that is 60 minutes × 360 degrees).
The foot (standard symbol: ft) [ 1][ 2] is a unit of length in the British imperial and United States customary systems of measurement. The prime symbol, ′, is commonly used to represent the foot. [ 3] In both customary and imperial units, one foot comprises 12 inches, and one yard comprises three feet.
A slug is defined as a mass that is accelerated by 1 ft/s 2 when a net force of one pound (lbf) is exerted on it. [ 2] One slug is a mass equal to 32.17405 lb (14.59390 kg) based on standard gravity, the international foot, and the avoirdupois pound. [ 3] In other words, at the Earth's surface (in standard gravity), an object with a mass of 1 ...
Gravitational metric system. ≈ 0.1382550 kgf⋅m. A pound-foot ( lb⋅ft ), abbreviated from pound-force foot ( lbf · ft ), is a unit of torque representing one pound of force acting at a perpendicular distance of one foot from a pivot point. [ 2] Conversely one foot pound-force (ft · lbf) is the moment about an axis that applies one pound ...
1⁄27 yd 3. SI units. 0.02831685 m 3. The cubic foot (symbol ft3 or cu ft) [ 1] is an imperial and US customary (non-metric) unit of volume, used in the United States and the United Kingdom. It is defined as the volume of a cube with sides of one foot ( 0.3048 m) in length. Its volume is 28.3168 L (about 1⁄35 of a cubic metre ).
For petroleum gases, the standard cubic foot (scf) is defined as one cubic foot of gas at 60 °F (288.7 K; 15.56 °C) and at normal sea level air pressure. The pressure definition differs between sources, but are all close to normal sea level air pressure. A pressure of 14.696 pounds per square inch (1.00000 atm; 101.325 kPa ). [ 2]
In radar -related subjects and in JTIDS, a data mile is a unit of distance equal to 6000 feet (1.8288 kilometres or 0.987 nautical miles ). An international mile is exactly 0.88 of a data mile. The speed of light is 983571056 ft/s, or about one foot per nanosecond. If it were exactly one foot per nanosecond, and a target was one data mile away ...