Dictionary of Energy
Covering all aspects of energy and its role in society, this unique text provides a comprehensive and organized body of knowledge on what is certain to become an increasingly vital area of scientific study in the 21st century.
TABLE OF CONTENTS Dictionary of Energy
H: Haber Bosch process Hz
Haber Bosch process heat island
Haber Bosch process
Materials. a widely used industrial process for the synthesis of ammonia by direct combination of nitrogen and hydrogen in the presence of iron catalysts; the basis of modern fertilizer production. [Developed by German chemists Fritz Haber, 1868 1934, and Carl Bosch, 1874 1940.]
Hadley circulation
Earth Science. a direct, thermally driven, zonally symmetric circulation that consists of an equator-directed movement of air from 30 north or south latitude, with rising wind components near the equator, pole-directed flow aloft, and descending components at 30 latitude again; it was initially proposed as an explanation for trade winds. Also, Hadley cell. [Described by English meteorologist George Hadley, 1685 1768.]
hadron
Physics. any particle of the largest family of elementary particles, which interact with each other through strong interactions, usually produce additional hadrons in a collision at high energy, and are roughly spherical.
Hahn, Otto
1879 1968, German physical chemist who (with Fritz Strassman) discovered the process of fission in uranium and thorium (1938). This immediately contributed to the discovery of chain reactions and the development of nuclear weapons and ultimately nuclear power.
half-life
Nuclear. the time required for one half of a radioactive sample to decay.
halide lamp
see METAL HALIDE LAMP.
halide torch
Health & Safety. a propane-powered device used to detect gas leaks in refrig-erating systems,...
Copyright Elsevier Ltd. 2006 under license agreement with Books24x7
