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diff --git a/896/CH7/EX7.9/9.sce b/896/CH7/EX7.9/9.sce
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+clc
+//Example 7.9
+//Calculate the specific impulse for a rocket
+Vy_exh=-3000//m/s in negative y direction
+Isp=-Vy_exh/1000//KN.s/Kg
+printf("The specific impulse on the rocket is %f KN.s/Kg",Isp);
+\ No newline at end of file