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An Interstellar Cloud of Gas and Dust with a Radius

Question 11

Multiple Choice

An interstellar cloud of gas and dust with a radius of 10⁵ AU rotates slowly,with its outer edge traveling at 10⁻³ km/s.How fast is the outer edge of the cloud rotating after it contracts to 100 AU?


A) 10-1 km/s
B) 1 km/s
C) 100 km/s
D) 103 km/s

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