The Free-Fall Contraction of a Molecular Cloud

question 48

Multiple Choice

The free-fall contraction of a molecular cloud

• A)can be initiated by shock waves from supernovae.
• B)can be initiated by nearby spectral type G stars.
• C)can be initiated by the rotation of the cloud.
• D)causes the cloud to become transparent to ultraviolet radiation.
• E)causes the particles in the cloud to decrease the speed with which they move.

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