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Spacetime Reference Libraries

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Spacetime
2004-10-19 04:45:42

Spacetime -- In special relativity and general relativity, time and three-dimensional space are treated together as a single four-dimensional manifold called spacetime (alternatively, space-time; see below). A point in spacetime may be referred to as an event. Each event has four coordinates (t, x, y, z). Just as the x, y, z coordinates of a point depend on the axes one is using, so...

Space
2004-10-19 04:45:42

Space -- The definition of space in physics is contentious. Various concepts used to try to define space have included: -- the structure defined by the set of "spatial relationships" between objects -- a manifold defined by a coordinate system where an object can be located. -- the entity that stops all objects in the universe from touching one another In classical physics,...

Word of the Day
cowpooling
  • The practice of two or more parties jointly purchasing all or part of a butchered cow and dividing the meat between them.
The word 'cowpooling' was formed on the model of 'carpooling'.