Why Is the Hyades Cluster Important for Building Up a Catalog

question 143

Multiple Choice

Why is the Hyades Cluster important for building up a catalog of the true luminosities of main- sequence stars?

• A)It is an extremely bright star cluster.
• B)It is an old globular cluster whose age we can determine very accurately by measuring its main- sequence turn- off point.
• C)It contains many Cepheid variable stars that can be used to determine its distance.
• D)It is close enough to us that the distance to its stars can be found by stellar parallax.
• E)It's a cluster that has been photographed over many decades, so we know how the stars vary in brightness.

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Definitions:

Average Variable Cost

The total variable cost divided by the quantity of output produced; it varies with production levels.

Average Fixed Cost

The constant expenses associated with production, which remain unaffected by the amount of goods produced, divided by the number of items made.

Average Variable Cost

The total variable cost of production divided by the quantity of output produced.

Average Total Cost

The total cost of production divided by the quantity of output produced, illustrating the average cost per unit of output.