. . . "Specific Impulse"@en . "http://www.grc.nasa.gov/WWW/K-12/airplane/specimp.html"^^ . "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}\\)."^^ . .