One Important Aspect of the Study of Binary Star Systems

question 234

Multiple Choice

One important aspect of the study of binary star systems, as distinct from single stars, is that it provides a

• A) measurement of the masses of stars.
• B) measurement of the surface temperatures of stars.
• C) verification of the Doppler equation for wavelength shift of light from moving objects.
• D) measurement of the composition (abundances of elements) inside stars.

---

Definitions:

Direct Labour Used

The total effort, measured in hours or costs, of workers directly involved in the manufacturing process of a product.

Variable Manuf. Overhead

Costs that vary with production volume, such as utilities and materials used in manufacturing.

Materials Quantity Variance

The difference between the actual quantity of materials used in production and the expected quantity, valued at standard cost.

Variable Manufacturing Overhead

Indirect manufacturing costs that vary with the production volume, such as utilities for machinery.