instantaneous centre
61space exploration — Investigation of the universe beyond Earth s atmosphere by means of manned and unmanned spacecraft. Study of the use of rockets for spaceflight began early in the 20th century. Germany s research on rocket propulsion in the 1930s led to… …
62Coastal management — This article is about coastal management aimed to prevent erosion and flooding. For broader management issues, see Integrated coastal zone management. Oosterscheldekering sea wall, the Netherlands. In some jurisdictions the terms sea defense and… …
63Smith chart — The Smith Chart, invented by Phillip H. Smith (1905 1987), [Smith, P. H.; Transmission Line Calculator; Electronics, Vol. 12, No. 1, pp 29 31, January 1939] [Smith, P. H.; An Improved Transmission Line Calculator; Electronics, Vol. 17, No. 1, p… …
64comet — cometary /kom i ter ee/, cometic /keuh met ik/, cometical, adj. cometlike, adj. /kom it/, n. Astron. a celestial body moving about the sun, usually in a highly eccentric orbit, consisting of a central mass surrounded by an envelope of dust and… …
65Heliocentrism — Heliocentric redirects here. For the albums, see Heliocentric (Paul Weller album) and Heliocentric (The Ocean Collective album). Heliocentric Universe …
66Official (basketball) — A college basketball official from a 2008 game between Division II teams Lake Superior State University and Northern Michigan University In basketball, an official is a person who has the responsibility to enforce the rules and maintain the order …
67Paul Hodkinson — (born 14 September 1965 in Liverpool, England), aka Hoko, is a former professional boxer. Hodkinson fought at Featherweight and is the former British, European and World (WBC) Featherweight Title holder. Gender : Male D.O.B : 14 Sept… …
68Neptune — This article is about the planet. For other uses, see Neptune (disambiguation). Neptune   …
69photography, technology of — Introduction equipment, techniques, and processes used in the production of photographs. The most widely used photographic process is the black and white negative–positive system (Figure 1 >). In the camera the lens projects an image of… …
70City — For other uses, see City (disambiguation). Shanghai is the most populous city proper in the world …
