When a Star Settles Down to a Stable Existence as a Main-Sequence

question 9

Multiple Choice

When a star settles down to a stable existence as a main-sequence star, what characteristics determines where on the main sequence in an H-R diagram the star will fall?

• A) its mass
• B) the fraction of its atmosphere that consists of hydrogen
• C) whether it is located on the outer regions or the central regions of the molecular cloud that gave it birth
• D) the speed and direction of its rotation
• E) the size of the disk around it

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