Two Main-Sequence Stars Have the Same Temperature

question 59

Multiple Choice

Two main-sequence stars have the same temperature.If star A is four times more luminous than star B, then

• A) star B is two times farther away than star A.
• B) star B is four times farther away than star A.
• C) star B is eight times farther away than star A.
• D) star B and star A lie at the same distance from us.
• E) it is impossible to determine their relative distances from the information given.

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Definitions:

Extinction Rate

The rate at which species become extinct over a certain period of time, an important measure in the study of biodiversity and conservation biology.

Biogeographic Province

A region defined by its climatic and geographical features, harboring a distinct set of flora and fauna.

Neotropical Region

A biogeographic region that includes South and Central America, the Mexican lowlands, the Caribbean islands, and southernmost parts of Florida, characterized by its distinct fauna and flora.

Greenhouse Gases

Gases in Earth's atmosphere that trap heat, contributing to the greenhouse effect and global warming.