Many Rich, Regular Clusters of Galaxies Contain Substantial Amounts of Very

question 177

Multiple Choice

Many rich, regular clusters of galaxies contain substantial amounts of very hot, intergalactic gas. What is believed to have produced this hot gas?

• A) collisions between galaxies in the cluster
• B) bursts of star formation in merging galaxies
• C) supernovae (exploding stars)
• D) jets of gas ejected by supermassive black holes at the centers of the galaxies

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Definitions:

Neurosis

A broad category that includes a range of mental health issues characterized by emotional distress, anxiety, or depression, but without delusions or hallucinations, where coping mechanisms can still function.

Object Relations Theory

A psychoanalytic theory focusing on relationships and the impacts of early interactions between infants and their caregivers.

Personality

The mix of attributes or qualities that constitute a person's unique identity.

Karen Horney

a German psychoanalyst known for her theory of neurotic needs and her contributions to the psychology of women and self-theory.