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A spacecraft is orbiting around a planet. Its orbital velocity is v = 8,680 m/s. Dark...

A spacecraft is orbiting around a planet. Its orbital velocity is v = 8,680 m/s. Dark force attacks the planet and is about to blow up the planet. A crew of the spacecraft decides to escape from the planet as soon as possible. What is the escape velocity of the spacecraft from this orbit in km/s? (Hint: The motion of the spacecraft is uniform circular motion).

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