Velocity-addition formula — In physics, a velocity addition formula is an equation that relates the velocities of moving objects in different reference frames. Contents 1 Galilean addition of velocities 2 Special theory of relativity 3 Derivation … Wikipedia
Digital media receiver — Media extender redirects here. For the extenders that connect to Windows Media Centers, see Windows Media Center Extender The Roku XD/S receiver works with popular streaming media sites like Amazon.com and Netflix as well as locally stored… … Wikipedia
Close Quarters Battle Receiver — Close Quarter Battle Receiver[1] Above: An M4A1 with SOPMOD package, including Rail Interface System and Trijicon 4x ACOG. The barrel length is 14.5 inches (370 mm). Below: An M4A1 with … Wikipedia
Displacement receiver — A displacement receiver is a device that responds to or is sensitive to directed distance (displacement). Examples of displacement receivers include carbon microphones, strain gauges, and pressure sensors or force sensors, which, to within an… … Wikipedia
Doppler effect — Change of wavelength caused by motion of the source. An animation illustrating how the Doppler effect causes a car engine or siren to soun … Wikipedia
radar — /ray dahr/, n. 1. Electronics. a device for determining the presence and location of an object by measuring the time for the echo of a radio wave to return from it and the direction from which it returns. 2. a means or sense of awareness or… … Universalium
navigation — navigational, adj. /nav i gay sheuhn/, n. 1. the act or process of navigating. 2. the art or science of plotting, ascertaining, or directing the course of a ship, aircraft, or guided missile. [1520 30; < L navigation (s. of navigatio) a voyage.… … Universalium
Comparison of the AK-47 and M16 — M16 (top) and AK 47 (bottom) assault rifles Firearm AK 47 M16A1 Manufacturer Izhmash ArmaLite, Colt … Wikipedia
M16 rifle — Rifle, 5.56 mm, M16 From top to bottom: M16A1, M16A2, M4A1, M16A4 Type Assault rifle Place … Wikipedia
small arm — small armed, adj. Usually, small arms. a firearm designed to be held in one or both hands while being fired: in the U.S. the term is applied to weapons of a caliber of up to one in. (2.5 cm). [1680 90] * * * ▪ military technology Introduction… … Universalium