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4) A satellite moving at 234,000 m/min; convert to km/s

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\begin{gathered} \text{speed}\Rightarrow234000\text{ m/min} \\ \Rightarrow(234000m)/(\min)*\frac{1\text{ km}}{1000\text{m}}*\frac{\min }{60\text{ sec}} \\ \Rightarrow3.9\text{ km/s} \end{gathered}

User Imre Greilich
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