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doit_the_clown doit_the_clown
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7 years ago
At what point in its evolution will a protostar stop shrinking and stabilize into a star?
A)   When nuclear processes generate enough energy and internal pressure to resist gravitational contraction
B)   When gravitational contraction has heated up the gas to the point where radiation pressure opposes gravity for the first time
C)   When it has spun off enough of its matter and is spinning fast enough that centrifugal force opposes the gravitational contraction
D)   When nuclear reactions end in its core
Textbook 
Discovering the Universe

Discovering the Universe


Edition: 7th
Authors:
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Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.

Albert Einstein
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papachulopapachulo
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7 years ago
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