Navy test fires electromagnetic cannon
The US Navy announced a successful test Friday of an electromagnetic cannon capable of firing a projectile 110 nautical miles (200 kilometers) at five times the speed of sound.
The US Navy announced a successful test Friday of an electromagnetic cannon capable of firing a projectile 110 nautical miles (200 kilometers) at five times the speed of sound.
Engineering
Dec 10, 2010
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The dream of igniting a self-sustained fusion reaction with high yields of energy, a feat likened to creating a miniature star on Earth, is getting closer to becoming reality, according the authors of a new review article ...
Plasma Physics
Sep 24, 2013
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US scientists have produced a laser shot with an unprecedented energy level that could be a key step towards nuclear fusion, the US National Nuclear Security Administration said Wednesday.
General Physics
Jan 28, 2010
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The Office of Naval Research (ONR)'s Electromagnetic (EM) Railgun program will take an important step forward in the coming weeks when the first industry railgun prototype launcher is tested at a facility in Dahlgren, Va., ...
Engineering
Feb 6, 2012
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Engineers have fired the Navy's first industry-built electromagnetic railgun (EM Railgun) prototype launcher at a test facility, commencing an evaluation that is an important intermediate step toward a future tactical weapon ...
Engineering
Feb 28, 2012
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(Phys.org)—In Spiderman 2, the superhero uses his webbing to bring a runaway train to a standstill moments before it plummets over the end of the track. But could a material with the strength and toughness of spiders' web ...
General Physics
Feb 25, 2013
3
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Senior Navy leaders will be on hand Dec. 10 at Naval Surface Warfare Center Dahlgren Division (NSWCDD), a tenant command to Naval Support Facility (NSF), Dahlgren, Va., for a record-setting test of the Office of Naval Research's ...
Engineering
Dec 7, 2010
15
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The joule ( /ˈdʒuːl/ or /ˈdʒaʊl/); symbol J) is a derived unit of energy or work in the International System of Units. It is equal to the energy expended (or work done) in applying a force of one newton through a distance of one metre (1 newton metre or N·m), or in passing an electric current of one ampere through a resistance of one ohm for one second. It is named after the English physicist James Prescott Joule (1818–1889).
In terms firstly of base SI units and then in terms of other SI units:
where N is the newton, m is the metre, kg is the kilogram, s is the second, Pa is the pascal, and W is the watt.
One joule can also be defined as:
This text uses material from Wikipedia, licensed under CC BY-SA