J (disambiguation)

J , j

• is a letter of the Latin alphabet, see J .

In math

• is one of the three imaginary units of the quaternions ${\displaystyle \mathrm {j} }$
• is the symbol for the j-function , a modular form ${\displaystyle j}$
• J _{n is} an abbreviation for the Johnson body .

In mechanics

• is the letter for the mass moment of inertia . ${\displaystyle J}$

In electrical engineering / electronics

• is the imaginary unit , especially in complex AC bills (a confused with the current to avoid) . ${\displaystyle \mathrm {j} }$ ${\displaystyle \mathrm {i} }$ ${\displaystyle i}$ ${\displaystyle \mathrm {j} ^{2}=-1}$

In physics

• is the symbol for the electrical current density ${\displaystyle {\vec {j}}}$
• is the unit vector in the y-direction in three-dimensional Euclidean space ${\displaystyle \mathbf {j} }$
• is the total angular momentum quantum number of an electron in an atom ${\displaystyle j}$
• is the total angular momentum quantum number of the electron shell ${\displaystyle J}$
• is the mechanical angular momentum quantum number of a molecule ${\displaystyle J}$
• is the symbol for the ion dose . ${\displaystyle J}$

In the SI system of units

• is the unit symbol of energy and stands for joule ${\displaystyle \mathrm {J} }$
• is the dimension symbol for the luminous intensity candela . ${\displaystyle {\mathsf {J}}}$

In chemistry

• the chemical element iodine was previously abbreviated as J. The today common spelling is iodine or I .

In computer science

• J is a programming language, see J (programming language) .

In exegesis

• J is the siglum for the hypothetical Pentateuch source of a Yahwist (two other sources are signed with P and E).

In astronomy

• Jupiter in astronomical nomenclature

In musicology

• the Jähns directory of the works of Carl Maria von Weber

J. stands for:

• Yes
• Year or
• Vintage .

In aviation , J stands for

• Jet Route - jet routes; Jet airways; upper airways (in the US); in contrast to Victor Airways
• Juliet (international spelling alphabet - ICAO alphabet ).
• Abbreviation for Business Class transport class on air travel

In numismatics , the code letter J stands for

• Hamburg on German coins from 1873 to the present day, and on coins for German East Africa.

J as a distinguishing mark on license plates:

• international: Japan
• Germany: independent city of Jena
• Jersey Island
• Philippines: Region 9: Zamboanga Peninsula
• Spain: Province of Jaén (to be discontinued)
• Czech Republic: Kraj Vysočina ( Jihlava ) (Eng. "Highlands region") (expiring).

More :

• Billeter J is a measure for the comparative description of demographic aging.

• J is a sailboat class.

• In the former GDR, the main antenna was always designated with J on radio stations. If this consisted of two masts, there was a J1 and a J2 mast. Examples: J1 mast Wachenbrunn , J1 mast Wiederau .

• J for Jude in German history: The passports of German Jews were stamped with a large red J in 1938 (see Jewish star ).

People :

• J is the sometimes used short name of the Jamiroquai singer Jay Kay
• J (musician) ( Jun Onose ; * 1970), Japanese bass player, singer, songwriter and music producer
• Stevie J. ( Steven A. Jordan ; * 1971), American music producer, songwriter and contemporary R&B singer
• J .: occasional stage name of Jaye Muller

See also:

• Series J

This is a disambiguation page for differentiating between several terms identified with the same word.