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71Atomic radius — Diagram of a helium atom, showing the electron probability density as shades of gray. The atomic radius of a chemical element is a measure of the size of its atoms, usually the mean or typical distance from the nucleus to the boundary of the… …
72furniture — furnitureless, adj. /ferr ni cheuhr/, n. 1. the movable articles, as tables, chairs, desks or cabinets, required for use or ornament in a house, office, or the like. 2. fittings, apparatus, or necessary accessories for something. 3. equipment for …
73Timeline of Russian inventions and technology records — The Hall of Space Technology in the Tsiolkovsky State Museum of the History of Cosmonautics, Kaluga, Russia. The exhibition includes the models and replicas of the following Russian inventions: the first satellite, Sputnik 1 (a ball under the… …
74Night action at the Battle of Jutland — Main article: Battle of Jutland Battle of Jutland Part of World War I The Battle of Jutland, 1916 …
75Viet Cong and PAVN battle tactics — Soldier of a NLF/Viet Cong Main Force Unit. They shared common arms, procedures, tactics, organization and personnel with PAVN. Viet Cong and PAVN battle tactics comprised a flexible mix of guerrilla and conventional warfare battle tactics used… …
76musical sound — Introduction any tone with characteristics such as controlled pitch and timbre. The sounds are produced by instruments in which the periodic vibrations can be controlled by the performer. That some sounds are intrinsically musical,… …
77Loud (Rihanna album) — Loud …
78Metalloid —   13 14 15 16 17   2  B Boron …
79Zebra mussel — Live zebra mussels underwater with shells open, animals respiring, siphons visible. Scientific classification Kingdom …
80Siege of Kimberley — Part of Second Boer War …
