Galactic Disks Appear Blue Because

question 75

Multiple Choice

Galactic disks appear blue because

• A) dark matter gravitationally shifts all wavelengths towards the blue.
• B) O and B blue giants are much brighter than G, K, or M dwarfs.
• C) they contain only blue reflection nebulae.
• D) dust obscures the longer, red, wavelengths.
• E) they contain no G, K, or M dwarfs.

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Definitions:

Return on Investment

A measure used to evaluate the efficiency or profitability of an investment, calculated as the net profit divided by the cost of investment.

Markup

The amount added to the cost of a product to cover expenses and generate profit, often expressed as a percentage of the cost.

Absorption Costing

An approach in accounting that involves adding all production-related costs, whether stable or variable, into the product’s final price.

Cost-plus Pricing

A pricing strategy where a fixed percentage or amount is added to the cost of producing a product to determine its selling price.