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After many years of hard work, you have fulfilled your life long dream of discovering a new planet in our solar system. You determine the planet has a mass twice that of Earth's with a radius $1.5$ times that of Earth.

Which of the following values is the strength of the gravitational field at the surface of this planet?


$g = 0.89\ \mathrm{m/s^2}$


$g = 11.02\ \mathrm{m/s^2}$


$g = 8.72\ \mathrm{m/s^2}$


$g = 13.08\ \mathrm{m/s^2}$

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