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May 29, 2015

Homework Help: physics

Posted by Dana on Sunday, October 10, 2010 at 2:30pm.

A 1000-kg space probe is motionless in space. To start moving, its main engine is fired for 5 seconds during which time it ejects exhaust gases at 5000 m/s. At the end of this process it is moving at 20 m/s. The approx. mass of the ejected gas is??

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