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• Speed of sound — Sound is a vibration that travels through an elastic medium as a wave. The speed of sound describes how much distance such a wave travels in a certain amount of time. In SI Units with dry air at 20 °C (68 °F), the speed of sound is 343 m/s. This… …   Wikipedia

• Synchrotron — A synchrotron is a particular type of cyclic particle accelerator in which the magnetic field (to turn the particles so they circulate) and the electric field (to accelerate the particles) are carefully synchronized with the travelling particle… …   Wikipedia

• APEX system — APEX stands for Additive system of Photographic EXposure, whichwas proposed in the 1960 ASA standardfor monochrome film speed, ASA PH2.5 1960,as a means of simplifying exposure computation.Exposure equationUntil the late 1960s, cameras did not… …   Wikipedia

• Quantum critical point — A quantum critical point is a special class of continuous phase transition that takes place at the absolute zero of temperature, typically in a material where the phase transition temperature has been driven to zero by the application of a… …   Wikipedia

• Hate (band) — Infobox musical artist Name = Hate Img capt = Img size = Landscape = Background = group or band Alias = Origin = Poland Genre = Death metal Years active = 1990 ndash; present Label = Novum Vox Mortiis Metal Mind Records WW3/Mercenary Music… …   Wikipedia

• Karavan — Infobox musical artist | Name = Karavan Img capt = Img size = 250 Landscape = yes Background = group or band Origin = Karachi, Sind, Pakistan Genre = Hard rock, heavy metal Years active = 1997–present Label = Karavan catalog Ltd Associated acts …   Wikipedia