keep+from+collision
81metamorphic rock — Any of a class of rocks that result from the alteration of preexisting rocks in response to changing geological conditions, including variations in temperature, pressure, and mechanical stress. The preexisting rocks may be igneous, sedimentary,… …
82Physical Sciences — ▪ 2009 Introduction Scientists discovered a new family of superconducting materials and obtained unique images of individual hydrogen atoms and of a multiple exoplanet system. Europe completed the Large Hadron Collider, and China and India took… …
83Glossary of rail terminology — Rail transport Operations Track Maintenance High speed Gauge Stations …
84Northwest Airlines Flight 253 — Flight 253 was moved to an isolated area just after it landed in Detroit. Occurrence summary …
85Opening of the Liverpool and Manchester Railway — The Duke of Wellington s train and other locomotives being readied for departure from Liverpool, 15 September 1830 The opening of the Liverpool and Manchester Railway (L M) took place on 15 September 1830 …
86Asteroid-impact avoidance — Planetary defense redirects here. For defending against alien invasion in fiction, see alien invasion. Artist s impression of a major impact event. The collision between Earth and an asteroid a few kilometres in diameter releases as much energy… …
87Occasionalism — Daisie Radner The seventeenth century doctrine known as occasionalism arose in response to a perceived problem. Cartesian philosophy generated the problem and provided the context for the answer. In the Cartesian ontology, mind and matter are… …
88Internet Relay Chat — IRC redirects here. For other uses, see IRC (disambiguation). For IRC channels dedicated to Wikipedia, see Wikipedia:IRC Internet Relay Chat (IRC) is a protocol for real time Internet text messaging (chat) or synchronous conferencing.[1] It is… …
89Jay-Z — Infobox musical artist Name = Jay Z Img capt = Img size = Background = solo singer Birth name = Shawn Corey Carter Spouse = Beyoncé Knowles Born = birth date and age|1969|12|4 Brooklyn, New York City Occupation = Rapper, songwriter, record… …
90Plasma (physics) — For other uses, see Plasma. Plasma lamp, illustrating some of the more complex phenomena of a plasma, including filamentation. The colors are a result of relaxation of electrons in excited states to lower energy states after they have recombined… …
