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A ground plane on a printed circuit board (PCB) is a large area or layer of copper foil connected to the circuit's ground point, usually one terminal of the power supply. It serves as the return path for current from many different components. A ground plane is often made as large as possible, covering most of the area of the PCB which is not ...
Turn-by-turn navigation is a feature of some satellite navigation devices where directions for a selected route are continually presented to the user in the form of spoken or visual instructions. [1] The system keeps the user up-to-date about the best route to the destination, and is often updated according to changing factors such as traffic ...
A Rand McNally map appended to the 1914 edition of The New Student's Reference Work. Rand McNally was the first major map publisher to embrace a system of numbered highways. One of its cartographers, John Brink, invented a system that was first published in 1917 on a map of Peoria, Illinois. In addition to creating maps with numbered roads ...
Category. v. t. e. Velocity is the speed in combination with the direction of motion of an object. Velocity is a fundamental concept in kinematics, the branch of classical mechanics that describes the motion of bodies. Velocity is a physical vector quantity: both magnitude and direction are needed to define it.
The Century: America's Time is a 15-part television series of documentaries produced by ABC News about the 20th century and the rise of the United States as a superpower. The documentary originally aired on The History Channel in 1999. Peter Jennings, anchor of ABC World News Tonight narrates the series. Along with distinguished journalist Todd ...
Drifting smoke particles indicate the movement of the surrounding gas.. Gas is one of the four fundamental states of matter.The others are solid, liquid, and plasma. A pure gas may be made up of individual atoms (e.g. a noble gas like neon), elemental molecules made from one type of atom (e.g. oxygen), or compound molecules made from a variety of atoms (e.g. carbon dioxide).
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