At the Tip of the Red Giant Branch,a Star Is

question 24

Multiple Choice

At the tip of the red giant branch,a star is half as hot as it was on the main sequence and 100 times larger.How does its luminosity compare to its value on the main sequence?

• A) It is now 10,000 times larger.
• B) It is now 600 times larger.
• C) It is now 16 times larger.
• D) It is now 16 times smaller.

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Definitions:

Chemical Energy

The potential of a chemical substance to undergo a transformation through a chemical reaction or to transform other chemical substances.

Mechanical Energy

The sum of potential and kinetic energy in physical systems, often involved in performing work or causing motion.

Kinetic Energy

The energy that an object possesses due to its motion, which is dependent on the mass of the object and the square of its velocity.

Heat Energy

Energy that results from the random movement of atoms, ions, or molecules; the greater the amount of heat energy in an object, the higher the object’s temperature.