Why Do We Know That at Least One Generation of Stars

question 16

Multiple Choice

Why do we know that at least one generation of stars formed and died before the Milky Way's globular clusters formed?

• A) All globular cluster stars have some amount of heavy elements.
• B) They are so old that nuclear fusion in globular cluster stars has altered their chemical abundances.
• C) Globular clusters are 9 to 10 billion years old.
• D) No globular cluster is older than 12 billion years.
• E) All globular clusters reside in the disk of the Milky Way.

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Definitions:

Predetermined Overhead Rate

An estimated rate used to allocate manufacturing overhead costs to products or job orders, based on a planned amount of activity.

Machine-Hours

A measure of production output or activity based on the number of hours machines are run, used in allocating machine-related costs to products.

Variable Manufacturing Overhead

Costs in the manufacturing process that fluctuate with the level of production output, such as utilities or materials.

Machine-Hours

A measure of production time, representing the number of hours machines are operated in the production process.