The hartree (symbol: E h ), also known as the Hartree energy , is the unit of energy in the atomic units system, named after the British physicist Douglas Hartree . Its CODATA recommended value is E h = 4.359 744 722 2060 (48) × 10 J = 27.211 386 245 981 (30) eV .
9-1188: (Redirected from HA ) [REDACTED] Look up ha , HA , Ha , or hA in Wiktionary, the free dictionary. Ha may refer to: Agencies and organizations [ edit ] Health authority , a former type of administrative organisation of the NHS in England and Wales Hells Angels Motorcycle Club Highways Agency (renamed Highways England , now National Highways ), UK government body maintaining England's major roads Homelessness Australia , peak body organisation for homeless people and services Homosexuals Anonymous an ex-gay program for dealing with unwanted same-sex attractions Hong Kong Housing Authority Arts, entertainment, and media [ edit ] Ha (Doseone album) , 2005 Ha (Talvin Singh album) , 2002 Ha! (Killing Joke album) , 1982 "Ha" (song) , by Juvenile Ha! (TV channel) , an American all-comedy TV channel Hamar Arbeiderblad ,
18-701: A Norwegian newspaper Human Action , a book by the Austrian economist Ludwig von Mises The Jim Henson Company , formerly known as ha! Language [ edit ] Ha (Javanese) (ꦲ), a letter in the Javanese script Ha (kana) , in syllabic Japanese script ه ( hāʾ ), ح ( ḥāʾ ), or خ ( ḫāʾ ), Arabic letters Ha language , the language of the Ha people in eastern Africa Hausa language , ISO 639-1 code HA Places [ edit ] Ha, Bhutan Hå , Norway Ha Gorge , Greece HA postcode area ,
27-607: A group of English postal districts in north-west London Henan , a province of China (Guobiao abbreviation HA) Science and technology [ edit ] Chemistry [ edit ] Hahnium , an element now called Dubnium Hyaluronan (Hyaluronic acid) , a carbohydrate structure Hydroxylapatite , a mineral Medicine [ edit ] Hyperandrogenic anovulation , also called polycystic ovary syndrome Health anxiety (HA) or hypochondriasis (hypochondria) Hemagglutinin (influenza) (HA), an antigenic glycoprotein from Influenza viruses Hemagglutination assay ,
36-588: A locomotive (classified type HA under the Southern Region's pre-TOPS scheme) Hawaiian Airlines (IATA designator HA) Highways Agency (now National Highways ), UK government body maintaining England's major roads Other uses [ edit ] Ha (mythology) Ha, one of deities Heng and Ha Ha people , a Tanzanian people Hospitalman Apprentice , a U.S. Navy rank See also [ edit ] Haa (disambiguation) Haha (disambiguation) Has (disambiguation) Topics referred to by
45-410: A measurement of viruses or bacteria Units of measure [ edit ] Hartree , an atomic unit of energy Hectare (ha), a unit of area Hectoampere , a unit of electric current Other uses in science and technology [ edit ] ha (function prefix) (half), a prefix for some trigonometric functions in mathematics High availability , systems design and implementation with
54-707: A view to maximising service Hour angle , in astronomy, one of the coordinates of the equatorial coordinate system H a , or alternative hypothesis , in statistical testing H-alpha (Hα), a deep-red visible spectral line of the hydrogen atom Surnames [ edit ] Ha (Chinese surname) ( 哈 ), found in the Hundred Family Surnames Ha (Korean surname) ( 하 , 河 or 夏) Hà , Vietnamese surname Xia (surname) ( 夏 ), romanized as Ha in Cantonese, Korean and Vietnamese pronunciation Transportation [ edit ] British Rail Class 71 ,
63-483: Is different from Wikidata All article disambiguation pages All disambiguation pages ha">ha The requested page title contains unsupported characters : ">". Return to Main Page . Hartree The hartree is approximately the negative electric potential energy of the electron in a hydrogen atom in its ground state and, by the virial theorem , approximately twice its ionization energy ;
72-500: The relationships are not exact because of the finite mass of the nucleus of the hydrogen atom and relativistic corrections . The hartree is usually used as a unit of energy in atomic physics and computational chemistry : for experimental measurements at the atomic scale, the electronvolt (eV) or the reciprocal centimetre (cm ) are much more widely used. where: Effective hartree units are used in semiconductor physics where e 2 {\displaystyle e^{2}}
81-447: The same term [REDACTED] This disambiguation page lists articles associated with the title Ha . If an internal link led you here, you may wish to change the link to point directly to the intended article. Retrieved from " https://en.wikipedia.org/w/index.php?title=Ha&oldid=1237809060 " Category : Disambiguation pages Hidden categories: Articles containing Korean-language text Short description
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