helium density of catalyst
31titanium — /tuy tay nee euhm/, n. Chem. a dark gray or silvery, lustrous, very hard, light, corrosion resistant, metallic element, occurring combined in various minerals: used in metallurgy to remove oxygen and nitrogen from steel and to toughen it. Symbol …
32Rocket engine — RS 68 being tested at NASA s Stennis Space Center. The nearly transparent exhaust is due to this engine s exhaust being mostly superheated steam (water vapor from its propellants, hydrogen and oxygen) …
33Titan (moon) — Titan Titan in 2005 by Cassini spacecraft Discovery Discovered by Christiaan Huygens …
34Nickel — This article is about the chemical element. For other uses, see Nickel (disambiguation). cobalt ← nickel → copper ↑ Ni ↓ Pd …
35Nitrous oxide — N2O redirects here. For other uses, see N2O (disambiguation). Laughing gas redirects here. For other uses, see Laughing gas (disambiguation). Not to be confused with nitric oxide (formula NO) or nitrogen dioxide (formula NO2). For other uses, see …
36Bussard ramjet — The Bussard ramjet is a theoretical method of spacecraft propulsion proposed in 1960 by the physicist Robert W. Bussard, popularized by Larry Niven in his Known Space series of books, and referenced by Carl Sagan in the television series and book …
37Chromium — This article is about the chemical element. For other uses, see Chromium (disambiguation). vanadium ← chromium → manganese ↑ Cr ↓ Mo …
38Manhattan Project — This article is about the atomic bomb project. For other uses, see Manhattan Project (disambiguation). Manhattan District The Manhattan Project created the first nuclear bombs. The Trinity test …
39Activated carbon — Activated carbon, also called activated charcoal, activated coal or carbo activatus, is a form of carbon that has been processed to make it extremely porous and thus to have a very large surface area available for adsorption or chemical reactions …
40Uranium dioxide — Chembox new Name = Uranium dioxide ImageFile = UO2lattice.jpg IUPACName = Uranium dioxide Uranium(IV) oxide Section1 = Chembox Identifiers CASNo = 1344 57 6 Section2 = Chembox Properties Formula = UO2 MolarMass = 270 g/mol Solvent = other… …
