When Does Hydrogen First Begin to Fuse into Helium in the Star

question 31

Multiple Choice

When does hydrogen first begin to fuse into helium in the star formation process?

• A)when the cloud first begins to contract
• B)when the thermal pressure is trapped at the center of the cloud
• C)when the protostars undergoes convective contraction
• D)when the protostar undergoes radiative contraction
• E)only when the star reaches the main-sequence

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