When Plotted on an H-R Diagram, the More Massive Stars

question 180

Multiple Choice

When plotted on an H-R diagram, the more massive stars of a particular star cluster are on the main sequence and the less massive stars are above the main sequence. Can the age of this cluster be determined? (In other words, how long is it since these stars condensed from the interstellar medium?)

• A) Yes, by finding the most massive star that is on the main sequence. The age of the cluster equals the time this star spent as a protostar.
• B) No.
• C) Yes, by finding the least massive protostar. The age of the cluster equals the time this star took to reach the main sequence.
• D) Yes, by finding the least massive star on the main sequence. The age of the cluster equals the time this star spent as a protostar.

---

Definitions:

Security Agreement

A legal document that secures an interest in collateral owned by the debtor for the benefit of a creditor in the event of default.

Debtor

An individual or entity that owes money to another party, often a lender or creditor.

Perfection

In the context of secured transactions, perfection is the legal process by which a secured creditor establishes its priority interest in the debtor's collateral over other claimants.

Legal Steps

Sequential actions or procedures that are taken in accordance with law to achieve a legal outcome, such as filing a lawsuit or executing a contract.