What Do We Mean by the Main-Sequence Turnoff Point of a Star

question 61

Multiple Choice

What do we mean by the main-sequence turnoff point of a star cluster,and what does it tell us?

• A)It is the point in a star cluster beyond which main-sequence stars are not found,and it tells us the cluster's distance.
• B)It is the spectral type of the hottest main-sequence star in a star cluster,and it tells us the cluster's age.
• C)It is the luminosity class of the largest star in a star cluster,and it tells us the cluster's age.
• D)It is the mass of the most massive star in the star cluster,and it tells us the cluster's size.

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Definitions:

Stimuli

External or internal factors that provoke a response or reaction.

Dissociative Amnesia

A psychological disorder characterized by temporary memory loss that cannot be accounted for by ordinary forgetfulness, often triggered by trauma or stress.

Psychological Conflict

A mental struggle arising from opposing demands or impulses within an individual.

Trauma

A deeply disturbing or distressing experience, often leading to lasting emotional and psychological effects.