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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Familial units that possess a significantly high level of wealth compared to the broader population.

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The abundance of valuable resources or material possessions, or the control of such assets, which gives an individual or group economic power.

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The money received, usually on a regular basis, for work or through investments.

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An almost pure ascription-based stratification system in which occupation and marriage partners are assigned on the basis of caste membership.