By Comparing Globular Clusters, You Find That Cluster A's RR

question 37

Multiple Choice

By comparing globular clusters, you find that Cluster A's RR Lyrae stars are 100 times fainter than Cluster B's RR Lyrae stars.You know that both clusters have approximately the same chemical composition and age, and thus their RR Lyrae stars should have the same luminosities.Which is true about the clusters' distances?

• A) Cluster A is 10 times farther away than Cluster B.
• B) Cluster A is 10 times closer to us than Cluster B.
• C) Clusters A and B are approximately the same distance from us.
• D) Cluster A is 100 times farther away than Cluster B.
• E) Cluster A is 100 times closer to us than Cluster B.

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Definitions:

Retained Earnings

Accumulated net income not distributed to shareholders as dividends but retained by the company for reinvestment in its operations or to pay debt.

Mining Tract

A specific piece of land designated for mineral extraction and mining operations.

Depletion

A method used to allocate the cost of extracting natural resources, such as timber, minerals, and oil, from the earth over the period those resources are consumed.

Reclamation

The process of restoring land that has been mined, logged, or used for industrial purposes back to its natural state or ensuring it is usable for a different purpose.