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specif'ic im'pulse



Rocketry.
1. a measure, usually in seconds, of the efficiency with which a rocket engine utilizes its propellants, equal to the number of pounds of thrust produced per pound of propellant burned per second.
2. the specific impulse that a given combination of propellants would produce in an ideal rocket engine providing complete combustion, no friction losses, and no lateral expansion of the exhaust.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

specific humidityspecific inductive capacity

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