If a 1 M _$\odot$ Protostar Starts Out on the Hayashi Track with a on the Hayashi

question 22

Multiple Choice

If a 1 M _$\odot$ protostar starts out on the Hayashi track with a temperature of 3300 K and a luminosity of 320 L _$\odot$ , what is its approximate radius?

• A) 25 R _\(\odot\)
• B) 55 R _\(\odot\)
• C) 75 R _\(\odot\)
• D) 105 R _\(\odot\)
• E) 125 R _\(\odot\)

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Definitions:

Bauxite

The primary ore of aluminum, consisting primarily of aluminum oxide minerals, clay minerals, and insoluble materials.

Aluminum Ore

The natural mineral compound from which aluminum is extracted, primarily bauxite.

Aluminum Futures

Contracts to buy/sell aluminum at a future date at a price agreed upon today, used for hedging or speculation on the aluminum market.

Short

Refers to short selling, a strategy used by investors who anticipate a stock's price will decline, allowing them to buy back at a lower price.