What Do We Mean by the Main-Sequence Turnoff Point of a Star

question 58

Multiple Choice

What do we mean by the main-sequence turnoff point of a star cluster, and what does it tell us?

• A) It is the spectral type of the hottest main sequence star in a star cluster, and it tells us the cluster's age.
• B) It is the point in a star cluster beyond which main sequence stars are not found, and it tells us the cluster's distance.
• C) It is the luminosity class of the largest star in a star cluster, and it tells us the cluster's age.
• D) It is the mass of the most massive star in the star cluster, and it tells us the cluster's size.

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Definitions:

Markup

A term used in accounting and finance to describe the difference between the cost of a good or service and its selling price.

Activity At Capacity

The level of operations where a company or a production process is utilizing all available resources without any waste.

Fixed Manufacturing Overhead

Indirect manufacturing costs that do not change with the level of production, such as salaries of managers and depreciation of factory equipment.

Estimated Labor-Hours

A projection of the total hours of work required to complete a task or project.