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Question
A 1000-kg space probe is motionless in space. To start moving, its main engine is fired for 5 s 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 approximate mass of the ejected gas is:
A) 0.8 kg
B) 4 kg
C) 5 kg
D) 20 kg
E) 25 kg
Answer
This answer is hidden. It contains 1 characters.
Related questions
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Q:
In a photoelectric effect experiment at a frequency above cut off, the stopping potential is proportional to:
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Q:
In a photoelectric effect experiment at a frequency above cut off, the number of electrons ejected is proportional to:
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Q:
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Q:
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Q:
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Q:
The resolving power of a telescope can be increased by:
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Q:
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Q:
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