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Miles per hour (mph, m.p.h., MPH, or mi/h) is a British imperial and United States customary unit of speed expressing the number of miles travelled in one hour. It is used in the United Kingdom , the United States , and a number of smaller countries, most of which are UK or US territories, or have close historical ties with the UK or US.
341.1: 1119.1: 1227.98: 763: The speed of sound in dry air at sea-level pressure and 20 °C: 343: 1125: 1235: 768: Mach 1 by definition. 20 °C = 293.15 kelvins. Muzzle velocity of a 7.62×39mm cartridge: 710: 2330: 2600: 1600: The 7.62×39mm round is a rifle cartridge of Soviet origin Official flight airspeed record for jet engined aircraft ...
A mathematical constant is a key number whose value is fixed by an unambiguous definition, often referred to by a symbol (e.g., an alphabet letter), or by mathematicians' names to facilitate using it across multiple mathematical problems. [1]
Len Deighton (born 1929) is a British author. His publications have included cookery books and works on history, but he is best known for his spy novels.He had several jobs before writing his first novel, The IPCRESS File, in 1962; it was a critical and commercial success.
Legendre symbol: If p is an odd prime number and a is an integer, the value of () is 1 if a is a quadratic residue modulo p; it is –1 if a is a quadratic non-residue modulo p; it is 0 if p divides a.
Latin and Greek letters are used in mathematics, science, engineering, and other areas where mathematical notation is used as symbols for constants, special functions, and also conventionally for variables representing certain quantities.
In the cases where non-SI units are used, the numerical calculation of a formula can be done by first working out the factor, and then plug in the numerical values of the given/known quantities. For example, in the study of Bose–Einstein condensate , [ 6 ] atomic mass m is usually given in daltons , instead of kilograms , and chemical ...
SI, and hence the use of "km/h" (or "km h −1 " or "km·h −1 ") has now been adopted around the world in many areas related to health and safety [36] and in metrology [37] in addition to the SI unit metres per second ("m/s", "m s −1 " or "m·s −1 "). SI is also the preferred system of measure in academia and in education.