apparent half-life
121Yttrium — (pronEng|ˈɪtriəm) is a chemical element with symbol Y and atomic number 39. It is a silvery metallic transition metal chemically similar to the lanthanoids and has historically been classified as a rare earth element. Yttrium is almost always… …
122nuclear weapon — an explosive device whose destructive potential derives from the release of energy that accompanies the splitting or combining of atomic nuclei. [1945 50] * * * or atomic weapon or thermonuclear weapon Bomb or other warhead that derives its force …
123Perpetual motion — For other uses, see Perpetual motion (disambiguation). Robert Fludd s 1618 water screw perpetual motion machine from a 1660 wood engraving. This device is widely credited as the first recorded attempt to describe such a device in order to produce …
124Primidone — Systematic (IUPAC) name 5 ethyl 5 phenyl hexahydropyrimidine 4,6 dione Clinical data Pregnancy cat. D …
125Team Fortress 2 — Éditeur Valve Corporation Développeur Valve Corporation Distributeur …
126Earth in science fiction — Earth An overwhelming majority of fiction is set on or features the Earth. However, authors of speculative fiction novels and writers and directors of science fiction film deal with Earth quite differently from authors of conventional fiction.… …
127They Hunger — is a single player horror based mod of Valve s first person shooter Half Life . It was released by Neil Manke s Black Widow Games in three episodes, the first in 1999, the second in 2000, and the final installment in 2001. All three were at one… …
128Methyprylon — Systematic (IUPAC) name (RS) 3,3 diethyl 5 methylpiperidine 2,4 dione Clinical data Trade names Dimerin, Methypryl …
