Ans: C Section: 13-9

question 345

Multiple Choice

Ans: C
Section: 13-9
-One difficulty with the density wave theory is that:

• A) the theory fails to explain why a given spiral pattern lasts only a small fraction of the lifetime of a galaxy.
• B) the theory fails to provide a mechanism for star formation.
• C) we are unsure of the mechanism that produces the energy output necessary to sustain the density wave.
• D) the theory fails to explain the distribution of Population I and Population II stars in a galaxy.

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Definitions:

Emotional Disturbances

A category of mental health issues that impair an individual's emotional regulation and behavior.

Self-image

An individual's conception of themselves or how they perceive their attributes, abilities, and values.

Incongruent Experiences

Experiences that do not align with an individual's self-concept, often leading to psychological distress.

Self-concept

Refers to an individual's perception of themselves, encompassing beliefs about one's attributes, roles, goals, and competencies.