In Determining the Distance to a Galaxy by Using Observations

question 121

Multiple Choice

In determining the distance to a galaxy by using observations of a Cepheid variable star,which of the following is NOT needed?

• A) The star's velocity via the Doppler effect
• B) The Cepheid's period of variability
• C) The type of spectrum of the Cepheid: metal-rich or metal-poor
• D) The star's average brightness or apparent magnitude

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Definitions:

Self-determination Theory

Self-determination Theory is a theory of human motivation that emphasizes the role of autonomy, competence, and relatedness in fostering well-being.

Relatedness

Feeling connected to others, both personally and in your community.

Unconscious Motivations

Drives and desires operating below an individual's conscious awareness, influencing behavior and thought processes.

Implicit Motives

Unconscious drives and desires that influence behavior, often contrasting with explicit motives which are consciously recognized by the individual.