# Resolve RDF Terms

quantitykind:SpecificImpulse
http://qudt.org/vocab/quantitykind/SpecificImpulse

### Recommended prefix

quantitykind:

lang:en
Specific Impulse
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The impulse produced by a rocket divided by the mass $$mp$$ of propellant consumed. Specific impulse $${I_{sp}}$$ is a widely used measure of performance for chemical, nuclear, and electric rockets. It is usually given in seconds for both U.S. Customary and International System (SI) units. The impulse produced by a rocket is the thrust force $$F$$ times its duration $$t$$ in seconds. $$I_{sp}$$ is the thrust per unit mass flowrate, but with $$g_o$$, is the thrust per weight flowrate. The specific impulse is given by the equation: $$I_{sp} = \frac{F}{\dot{m}g_o}$$.
lang:""
http://www.grc.nasa.gov/WWW/K-12/airplane/specimp.html