Suppose a Scientist Holds a Press Conference at Which He

question 30

Multiple Choice

Suppose a scientist holds a press conference at which he claims that 10% of the matter in the Milky Way is in the form of dust grains.Does his claim seem reasonable? Why or why not?

• A)It is reasonable,because we already know that interstellar dust obscures our view through the disk of the galaxy.
• B)The 10% figure is too low,because most of the mass of the galaxy is in the form of interstellar dust.
• C)The 10% figure is too high because there are not enough heavy elements to make that much dust.
• D)It seems reasonable as long as we assume that red giant stars-which produce dust grains in their stellar winds-are more common than we thought.

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Definitions:

Variable Manufacturing Overhead

Overhead costs that fluctuate directly with the volume of production output, such as utilities and indirect materials.

Raw Materials

The basic, unprocessed inputs used in manufacturing to produce goods and finished products.

Price Variance

The difference between the actual cost and the standard or expected cost of an item or service.

Direct Labor-Hours

The total hours of work directly spent on producing a specific product or service.