Encyclopedia > 409

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Centuries: 4th century - 5th century - 6th century

Decades: 350s 360s 370s 380s 390s - 400s - 410s 420s 430s 440s 450s

Years: 404 405 406 407 408 - 409 - 410 411 412 413 414




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Shaped charge

... the cone is chosen so that the speed of the blast at the surface of the cone is equal to the speed of sound of the metal on the surface of the cone. The result is usually ...