NASA has launched a mission to a newly discovered object, spherical in shape. A satellite is given...

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Physics

NASA has launched a mission to a newly discovered object,spherical in shape.

A satellite is given a gravitationally driven circular orbitaround the object. The altitude of the satellite in its orbit isequal to the radius of the object, and it takes 19.4 × 103 ??? forthe satellite to complete one orbit.

At the same time, a rover lands on the surface of the object.NASA engineers notice one of the support arms on it is broken andis swinging like a pendulum. The arm is 1.50 ? long and the periodof its swing is 7.30 ???.

What is the radius (in km) and mass (in kg) of this newlydiscovered object?

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