If you observed a gas cloud orbiting in a disk of a spiral galaxy that was located 10,000 pc from the center and it rotated with a speed of 300 km/s,what is the mass of the galaxy interior to gas cloud's orbit? A)1 × 10¹¹ M_⨀ B)2 × 10¹¹ M_⨀ C)8 × 10¹¹ M_⨀ D)1 × 10¹² M_⨀ E)4 × 10¹² M_⨀

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The Answer of If you observed a gas cloud orbiting in a disk of a spiral galaxy that was located 10,000 pc from the center and it rotated with a speed of 300 km/s,what is the mass of the galaxy interior to gas cloud's orbit? A)1 × 10¹¹ M_⨀ B)2 × 10¹¹ M_⨀ C)8 × 10¹¹ M_⨀ D)1 × 10¹² M_⨀ E)4 × 10¹² M_⨀

If You Observed a Gas Cloud Orbiting in a Disk