electric welding set
71Fuel cell — For other uses, see Fuel cell (disambiguation). Demonstration model of a direct methanol fuel cell. The actual fuel cell stack is the layered cube shape in the center of the image A fuel cell is a device that converts the chemical energy from a… …
72Screw — This article is about the fastener. For other uses, see Screw (disambiguation). Screws come in a variety of shapes and sizes for different purposes. U.S. quarter coin (diameter 24 mm) shown for scale. A screw, or bolt, is a type of fastener… …
73Helium — otherusesHelium (He) is a colorless, odorless, tasteless, non toxic, inert monatomic chemical element that heads the noble gas group in the periodic table and whose atomic number is 2. Its boiling and melting points are the lowest among the… …
74Irving Langmuir — Infobox Scientist name = Irving Langmuir image size = 180px birth date = birth date|1881|1|31 birth place = Brooklyn, New York death date = death date and age|1957|8|16|1881|1|31 death place = Woods Hole, Massachusetts nationality = United States …
75Zinc — This article is about the metallic element. For other uses, see Zinc (disambiguation). copper ← zinc → gallium ↑ Zn ↓ Cd …
76Four-wheel drive — This article is about the class of vehicle drivetrains. For other uses, see Four by four/Four wheel drive (disambiguation). All wheel drive redirects here. For the all wheel drive in motorcycles, see two wheel drive. The Jeep Wrangler is a 4WD… …
77British Rail Class 357 — Electrostar Class 357 006 at West Ham in the new National Express c2c livery …
78Nottingham Corporation Tramways — This article is about trams between 1898–1938. For trams between 1875 1897, see Nottingham and District Tramways Company Limited. For trams from 2004 onwards, see Nottingham Express Transit. Tram passing Nottingham Victoria Railway Station… …
79Coal — Sedimentary Rock Anthracite coal Composition Primary carbon Secondary hydrogen, sulfur …
80Manhattan 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 …
