h
名词 h:
a nonmetallic univalent element that is normally a colorless and odorless highly flammable diatomic gas; the simplest and lightest and most abundant element in the universe
同义词:hydrogen, atomic number 1
a unit of inductance in which an induced electromotive force of one volt is produced when the current is varied at the rate of one ampere per second
同义词:henry
the constant of proportionality relating the energy of a photon to its frequency; approximately 6.626 x 10^-34 joule-second
the 8th letter of the Roman alphabet
同义词:letter h
(thermodynamics) a thermodynamic quantity equal to the internal energy of a system plus the product of its volume and pressure
同义词:heat content, total heat, enthalpy