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THRUST: noun; the name of the force that moves an aircraft forward and opposes drag
Ex. The ice on the wings is increasing drag; our effective thrust is decreasing
TRACE : noun; a small amount, sufficient to show something exists
Ex. There was a trace of ice on the wings, but it had no real effect.
VAPOR: noun; a gas as compared to a liquid or a solid
Ex. When water evaporates into the air, the gas is called water vapor.
VAPORIZE: verb; to change to a gas
Ex. The gasoline is vaporized in the carburetor.
