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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).
Coordinates were measured in grades on official French terrestrial ordnance charts from the French revolution well into the 20th century. 1 grade (or in modern symbology, 1 gon) = 0.9° or 0.01 right angle. One advantage of this measure is that the distance between latitude lines 0.01 gon apart at the equator is almost exactly 1 kilometre.
The mile, sometimes the international mile or statute mile to distinguish it from other miles, is a British imperial unit and United States customary unit of length; both are based on the older English unit of length equal to 5,280 English feet, or 1,760 yards.
This corresponds to about 2 to 10 nanometers, and at 10 nm in diameter, nearly 3 million quantum dots could be lined up end to end and fit within the width of a human thumb. Idealized image of colloidal nanoparticle of lead sulfide (selenide) with complete passivation by oleic acid, oleyl amine, and hydroxyl ligands (size ≈5 nm)
The term , where is the speed, and is the fuel consumption rate, is called the specific range (= range per unit mass of fuel; S.I. units: m/kg). The specific range can now be determined as though the airplane is in quasi-steady-state flight.
The range increase was most important: The A-2 range was 1,500 nautical miles (2,800 kilometres), the A-3 2,500 nautical miles (4,600 kilometres), and the B-3 2,000 nautical miles (3,700 kilometres). The A-3 featured multiple re-entry vehicles ( MRVs ) which spread the warheads about a common target, and the B-3 was to have penetration aids to ...
The resulting values can be divided by 10 to convert them into astronomical units (AU), resulting in the expression: a = 0.4 + 0.3 × 2 n . {\displaystyle a=0.4+0.3\times 2^{n}~.} For the far outer planets, beyond Saturn , each planet is predicted to be roughly twice as far from the Sun as the previous object.
Scottish inch The Scottish inch was 25.44 mm, almost the same as the English (and modern international) inch (25.40 mm). [2] A fraudulent smaller inch of 1 ⁄ 42 ell (22.4 mm) is also recorded.