lead-chamber space
121subatomic particle — or elementary particle Any of various self contained units of matter or energy. Discovery of the electron in 1897 and of the atomic nucleus in 1911 established that the atom is actually a composite of a cloud of electrons surrounding a tiny but… …
122Components of jet engines — Diagram of a typical gas turbine jet engine. Air is compressed by the fan blades as it enters the engine, and it is mixed and burned with fuel in the combustion section. The hot exhaust gases provide forward thrust and turn the turbines which… …
123UNITED STATES OF AMERICA — UNITED STATES OF AMERICA, country in N. America. This article is arranged according to the following outline: introduction Colonial Era, 1654–1776 Early National Period, 1776–1820 German Jewish Period, 1820–1880 East European Jewish Period,… …
124Ultraviolet — UV redirects here. For other uses, see UV (disambiguation). UVB redirects here. For the mysterious shortwave radio station in Russia, see UVB 76. For other uses, see Ultraviolet (disambiguation). False color image of the Sun s corona as seen in… …
125Bipropellant rocket — A bipropellant rocket engine is a rocket engine that uses two propellants (very often liquid propellants) which are kept separately prior to reacting to form a hot gas to be used for propulsion.In contrast, most solid rockets have single solid… …
126Aeroponics — is the process of growing plants in an air or mist environment without the use of soil or an aggregate medium. Aeroponic culture differs from both hydroponics and in vitro (Plant tissue culture) growing. Unlike hydroponics, which uses water as a… …
127Etobicoke School of the Arts — Infobox Education in Canada name= Etobicoke School of the Arts imagesize= streetaddress= 675 Royal York Road city= Etobicoke province= Ontario postalcode= M8Y 2T1 areacode= 416 phone= 394 6910 fax= 394 3849 url= http://schools.tdsb.on.ca/esa/ and …
128steel — steellike, adj. /steel/, n. 1. any of various modified forms of iron, artificially produced, having a carbon content less than that of pig iron and more than that of wrought iron, and having qualities of hardness, elasticity, and strength varying …
