Star a and Star B Both Have the Same Temperature

question 32

Multiple Choice

Star A and star B both have the same temperature but different sizes and distances. As a result, star A is more luminous than star B, but star B is brighter than star A. Which of these statements about the absolute and apparent magnitudes of the two stars is correct?

• A) Star A has a larger apparent magnitude and a larger absolute magnitude.
• B) Star A has a larger apparent magnitude, while star B has a larger absolute magnitude.
• C) Star B has a larger apparent magnitude and a larger absolute magnitude.
• D) Star B has a larger apparent magnitude, while star A has a larger absolute magnitude.
• E) Both stars have the same apparent and absolute magnitudes.

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Definitions:

Substrate

A substance or surface on which an enzyme acts or where a chemical reaction occurs.

Citric Acid Cycle

A series of chemical reactions used by all aerobic organisms to release stored energy through the oxidation of acetyl-CoA derived from carbohydrates, fats, and proteins into carbon dioxide and chemical energy.

ATP

Adenosine triphosphate, a high-energy molecule that stores and supplies the cell with needed energy for various functions.

Succinyl CoA

A compound in the citric acid cycle that plays a role in the synthesis of porphyrin for hemoglobin and as an intermediate in several metabolic pathways.