If a 1 M_⨀protostar Starts Out on the Hayashi Track

question 80

Multiple Choice

If a 1 M_⨀protostar starts out on the Hayashi track with a temperature of 3300 K and a luminosity of 320 L_⨀,what is its approximate radius?

• A)25 R_⨀
• B)55 R_⨀
• C)75 R_⨀
• D)105 R_⨀
• E)125 R_⨀

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Definitions:

Nucleotides

The basic building blocks of nucleic acids like DNA and RNA, consisting of a sugar, a phosphate group, and a nitrogenous base.

Purines

A type of nitrogenous base found in DNA and RNA, including adenine and guanine, which pair with pyrimidines.

Pyrimidines

One of the two classes of nitrogenous bases found in nucleic acids, including cytosine, thymine (in DNA), and uracil (in RNA).

Bacteriophages

Viruses that infect and replicate within bacteria.