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H, henry | 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 | |
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enthalpy, heat content, total heat, H | [in thermodynamics] a thermodynamic quantity equal to the internal energy of a system plus the product of its volume and pressure | |
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hydrogen, H, atomic number 1 | 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 | |
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H, h | the 8th letter of the Roman alphabet | |
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h, Planck's constant | the constant of proportionality relating the energy of a photon to its frequency; approximately 6.626 x 10^-34 joule-second |