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A newly discovered planet has a mass equal to Earth's mass, but its radius is twice...

A newly discovered planet has a mass equal to Earth's mass, but its radius is twice the radius of Earth. The acceleration due to gravity on the surface of this planet must be

9.80 m/s2

19.6 m/s2

4.90 m/s2

13.9 m/s2

2.45 m/s2

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