Cygnus X-1 and LMC X-3 Are Black Holes If the Masses

question 19

Multiple Choice

Cygnus X-1 and LMC X-3 are black holes if the masses of the unseen companions are

• A) less than 5 solar masses.
• B) more than 5 solar masses.
• C) between 0.4 and 1.4 solar masses.
• D) less than 0.4 solar masses.
• E) not larger than the masses of the stars that we can see.

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Definitions:

Total Direct Materials Cost Variance

The difference between the actual costs of direct materials used in production and the expected (or standard) costs.

Direct Materials Price

The cost of raw materials and components required for the manufacture of a product.

Direct Materials Quantity Variance

The difference between the actual quantity of materials used in production and the expected quantity, multiplied by the standard cost per unit.

Direct Materials Price Variance

The difference between the actual cost of direct materials and the expected (or standard) cost, used in manufacturing and budgeting.