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13 years ago
A rocket is fired in a gravity-free environment in deep space. The rocket has an initial mass of 8000 kg and ejects gas with a velocity of 2000 m/s. How much gas must be ejected in the first second to give the rocket an acceleration of 30.0 m/s2?
A) 120 kg
B) 7.50 kg
C) 15.0 kg
D) 12.0 kg
E) 150 kg
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13 years ago
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