pendulum measurements
71Han Dynasty — 漢朝 ← 206 BCE–220 CE …
72Watch — For other uses, see Watch (disambiguation). Early wrist watch by Waltham, worn by soldiers in World War I (Deutsches Uhrenmuseum, Inv. 47 3352) A watch is a small timepiece, typically worn either on the wrist or attached on a chain and carried in …
73Frederick W. Lanchester — Infobox Engineer image size = 150px caption = PAGENAME name = PAGENAME nationality = English birth date = October 23, 1868 birth place = Lewisham, London death date = March 8, 1946 death place = education = spouse = parents = children =… …
74Ekman spiral — The Ekman spiral refers to a structure of currents or winds near a horizontal boundary in which the flow direction rotates as one moves away from the boundary. It derives its name from the Swedish oceanographer Vagn Ekman. The deflection of… …
75Civilization One — Infobox Book name = Civilization One: The World is Not as You Thought It Was image caption = Civilization One cover artist = Kevin Jones Associates author = Christopher Knight language = English genre = Non fiction publisher = Watkins pub date =… …
76Constante gravitationnelle —  Ne doit pas être confondu avec g, accélération de la pesanteur à la surface de la Terre En physique, la constante de proportionnalité de la loi de la gravitation est notée , et est appelée constante gravitationnelle, ou constante… …
77education — /ej oo kay sheuhn/, n. 1. the act or process of imparting or acquiring general knowledge, developing the powers of reasoning and judgment, and generally of preparing oneself or others intellectually for mature life. 2. the act or process of… …
78ARCA (NGO) — ARCA Type Private Industry Aerospace and space tourism Founded 1999 …
79Albert Einstein — Einstein redirects here. For other uses, see Einstein (disambiguation) …
80Archaeoastronomy — (also spelled archeoastronomy) is the study of how peoples in the past have understood the phenomena in the sky, how they used phenomena in the sky and what role the sky played in their cultures. [Sinclair 2006:13] Clive Ruggles argues it… …
