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Spaceman Speff Orbits Spherical Asteroid X with His Spaceship

question 31

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Spaceman Speff orbits spherical asteroid X with his spaceship. To remain in a circular orbit at 421 km from the asteroid's center, he should maintain a speed of Spaceman Speff orbits spherical asteroid X with his spaceship. To remain in a circular orbit at 421 km from the asteroid's center, he should maintain a speed of   What is the mass of planet X? (G = 6.67 × 10<sup>-11</sup> N ∙ m<sup>2</sup>/kg<sup>2</sup>)  A)  4.0 × 10<sup>19</sup> kg B)  5.1 × 10<sup>17</sup> kg C)  4.0 × 10<sup>16</sup> kg D)  5.1 × 10<sup>14</sup> kg What is the mass of planet X? (G = 6.67 × 10-11 N ∙ m2/kg2)


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