A solid-fueled rocket can be made using a fuel grain with either a hole (a), or starred

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A solid-fueled rocket can be made using a fuel grain with either a hole (a), or starred cavity (b), in the cross section. From experiment the engine thrust-time curves (T vs. t) for the same amount of propellant using these geometries are shown. Determine the total impulse in both cases.imageimageimage

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