"The Navy announced last week that it hit a milestone with its railgun project. The railgun fires a very fast projectile that is accelerated with electricity rather than gunpowder or explosives. The weapon payload uses kinetic energy to destroy targets rather than a high-explosive warhead...The Navy milestone hit last week was the world-record 33-megajoul shot from the electromagnetic Railgun aboard the Navy Surface Center Dahlgren Division. A megajoule is a measurement of energy associated with a mass traveling at a certain velocity.
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