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In the future, astronauts are on a distant moon that is 618.9 km in diameter. While...

In the future, astronauts are on a distant moon that is 618.9 km in diameter.

While there, they observe that a 2.0 m long pendulum takes 5.623 times longer than the pendulum did, when it was back on Earth.

What is the mass of the moon?

Round your answer to 4 significant figures in units of kg.

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