For Low-Mass Main-Sequence Stars in Hydrostatic Equilibrium, at Any Interior

question 22

Multiple Choice

For low-mass main-sequence stars in hydrostatic equilibrium, at any interior radius there exists a balance between the downward gravitational force at that radius and:

• A) the pressure from a degenerate electron core
• B) the convective force of material rising from the interior
• C) the energy released from fusion reactions in the core
• D) the outward gas pressure from the material inside that radius
• E) the energy released by fusion reactions in a shell surrounding the degenerate core

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Definitions:

Nasal Conchae

These are long, narrow, curled shelves of bone that protrude into the nasal cavity, increasing its surface area.

Epiglottis

A leaf-shaped flap of cartilage located behind the tongue, at the top of the larynx, which prevents food from entering the airways during swallowing.

Uvula

A small, fleshy extension at the back of the soft palate that hangs above the throat, playing roles in speech and preventing food from entering the nasal cavity.