23. Planet Alpha has the same radius and 4 times the mass of the Earth. What is thebest estimate for the magnitude of the gravitational field at the surface of planetAlpha?a. 10 m/s?b. 2.5 m/s?c. 20 m/s?d. 40 m/s?24. The planet Theta has 3 times the gravitational field strength and 4 tirmes the mass ofthe Earth. How does the radius of Theta compare with the radius of Earth?a. rTheta = rEarth2b. rTheta = E"Earth4C. TTheta=-TEarth3d. TThetaVZrEarth

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23. Planet Alpha has the same radius and 4 times the mass of the Earth. What is the best estimate for the magnitude of the gravitational field at the surface of planet Alpha? a. 10 m/s? b. 2.5 m/s? c. 20 m/s? d. 40 m/s?