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Q. Far in space, where gravity is negligible, a 425 kg rocket traveling at 75 m/s fires its engines. The mass lost by the rocket during these 30 s is negligible. The impulse is 15000 Ns. At what time does the rocket reach its maximum speed and what is the maximum speed?

Q. How much force is required to hold a 7.0 cm diameter hose delivering 440 L/min through a 0.73cm diameter nozzle?

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