Synonyms: total heat, enthalpy, heat content, H
Definition: (thermodynamics) a thermodynamic quantity equal to the internal energy of a system plus the product of its volume and pressure
Usage: enthalpy is the amount of energy in a system capable of doing mechanical work
Similar words: physical property
Definition: any property used to characterize matter and energy and their interactions
Definition: the 8th letter of the Roman alphabet
Similar words: alphabetic character, letter, letter of the alphabet
Definition: the conventional characters of the alphabet used to represent speech
Usage: his grandmother taught him his letters
Synonyms: h, Planck's constant
Definition: the constant of proportionality relating the energy of a photon to its frequency; approximately 6.626 x 10^-34 joule-second
Similar words: constant of proportionality, factor of proportionality
Definition: the constant value of the ratio of two proportional quantities x and y; usually written y = kx, where k is the factor of proportionality
Definition: 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
Similar words: inductance unit
Definition: a measure of the property of an electric circuit by which an electromotive force is induced in it
Synonyms: atomic number 1, hydrogen, H
Definition: 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
Similar words: element, chemical element
Definition: any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter
Similar words: gas
Definition: a fluid in the gaseous state having neither independent shape nor volume and being able to expand indefinitely