2H
Encyclopedia
2H or 2-H may refer to:
- 2H lead, a type of lead in a pencilPencilA pencil is a writing implement or art medium usually constructed of a narrow, solid pigment core inside a protective casing. The case prevents the core from breaking, and also from marking the user’s hand during use....
- 2H, a type of Toyota H engineToyota H engine- H :The H is a 3.6 L inline 6, 12 valve OHV diesel engine. Bore is 88 mm and stroke is 98 mm, with a compression ratio of 21:1...
- Douglas O-2H, a model of Douglas O-2Douglas O-2The Douglas O-2 is a 1920s American observation aircraft built by the Douglas Aircraft Company.-Development:The important family of Douglas observation aircraft sprang from two XO-2 prototypes, the first of which was powered by the 420 hp Liberty V-1650-1 V-engine and test-flown in the autumn...
- Chaparral 2H, one model of Chaparral Cars
- Aptera 2h, a model in the Aptera 2 SeriesAptera 2 SeriesThe Aptera 2 Series is an upcoming high-efficiency passenger three-wheeled automobile produced by Aptera Motors. The California-based company opened a pre-ordering process for residents of California, but stopped taking deposits in July 2011, and on August 12, 2011, Aptera announced it will return...
- SSH 2H (WA), alternate designation for Washington State Route 290Washington State Route 290State Route 290 , named Hamilton Street and Trent Avenue, is a long state highway serving Spokane County in the U.S. state of Washington. SR 290 travels parallel to a Union Pacific railroad from in Spokane through Millwood and across the Spokane River three times towards Spokane...
- 2H, a disgnation for chemicals with two hydrogenHydrogenHydrogen is the chemical element with atomic number 1. It is represented by the symbol H. With an average atomic weight of , hydrogen is the lightest and most abundant chemical element, constituting roughly 75% of the Universe's chemical elemental mass. Stars in the main sequence are mainly...
molecules - 2H-pyran, a form of PyranPyranIn chemistry, a pyran, or oxine, is a six-membered heterocyclic, non-aromatic ring, consisting of five carbon atoms and one oxygen atom and containing two double bonds. The molecular formula is C5H6O. There are two isomers of pyran that differ by the location of the double bonds...
- 2H-1-benzopyran, a form of BenzopyranBenzopyranBenzopyran is an polycyclic organic compound that results from the fusion of a benzene ring to a heterocyclic pyran ring. According to IUPAC nomenclature it is called chromene. There are two isomers of benzopyran depending on the orientation of the fusion of the two rings, resulting in 1-benzopyran...
- 2H-pyran-2-one, a form of 2-Pyrone2-Pyrone2-Pyrone is an unsaturated cyclic chemical compound with the molecular formula C5H4O2. It is isomeric with 4-pyrone....