angular divergence
71King Crimson — This article is about the musical group. For the character in novels by Stephen King, see Crimson King. King Crimson King Crimson, 1982, l r Robert Fripp, Adrian Belew, Tony Levin, and Bill Bruford Background information …
72Universe — For other uses, see Universe (disambiguation). Physical cosmology …
73Holography — (from the Greek, ὅλος hólos whole + γραφή grafē writing, drawing) is a technique that allows the light scattered from an object to be recorded and later reconstructed so that it appears as if the object is in the same position relative to the… …
74Longitudinal wave — Longitudinal waves, as known as l waves , are waves that have the same direction of vibration as their direction of travel, which means that the movement of the medium is in the same direction as or the opposite direction to the motion of the… …
75Hamiltonian mechanics — is a re formulation of classical mechanics that was introduced in 1833 by Irish mathematician William Rowan Hamilton. It arose from Lagrangian mechanics, a previous re formulation of classical mechanics introduced by Joseph Louis Lagrange in 1788 …
76History of the telescope — The earliest known working telescopes appeared in 1608 and are credited to Hans Lippershey and Zacharias Janssen, spectacle makers in Middelburg, and Jacob Metius of Alkmaar. The design of these early refracting telescopes consisted of a convex… …
77Buoyancy — The forces at work in buoyancy In physics, buoyancy (  / …
78Primitive equations — The primitive equations are a set of nonlinear differential equations that are used to approximate global atmospheric flow and are used in most atmospheric models. They consist of three main sets of equations: # Conservation of momentum :… …
79Conserved current — In physics a conserved current is a current, jμ, that satisfies the continuity equation . The continuity equation represents a conservation law, hence the name. Indeed, integrating the continuity equation over a volume V, large enough to have no… …
80Jet engine performance — This article describes how jet engine performance is estimated during the design phase. Similar techniques are used once the engine has been built and is being tested, except the performance of individual components, rather than being assumed, is …
