Which of the following has not been detected around other stars in the Galaxy?
A) a collapsing nebula of gas
B) flattened, spinning disks
C) jovian planets
D) asteroids
E) strong stellar winds
D
Physics & Space Science
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A projectile is launched from the surface of a planet (mass = m, radius = r). What minimum launch speed is required if the projectile is to rise to a height of 2r above the surface of the planet? Disregard any dissipative effects of the atmosphere.
A.
B.
C.
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