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b. the propellant mass flow rate, given that the rocket engine thrust is 1,670,000 NA chemical rocket motor with a specific impulse of 400 sec is used in the final stage of a multistage launch vehicle for deep space exploration. This final stage has a mass ratio (initial to final) of 6, and its single roclet motor is first fire while it orbits the earth at a velocity of 26,000 ft/sec to eascape gravitational field. Determine the percentage of fuel that must be used to perform this maneuver (neglect gravity and drag)
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