Dark Matter Is Matter That Gives Out No Observable Radiation

question 49

Multiple Choice

Dark matter is matter that gives out no observable radiation and is detected by its gravitational interaction alone. Which of these does NOT provide direct evidence for dark matter?

• A) separation of visible and dark matter in collisions of galaxy clusters
• B) emission from hot intergalactic gas in galaxy clusters
• C) gravitational lensing by unseen objects
• D) insufficient visible mass to bind galaxy clusters gravitationally

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Definitions:

Death Ignorer

A person who attempts suicide without recognizing the finality of death.

Durkheim

A French sociologist, Émile Durkheim, known for his foundational contributions to the field of sociology and his theory on the social causes of suicide.

Suicide

The intentional act of causing one's self-demise.

Edwin Shneidman's Definition

An approach to understanding suicide as primarily a response to intense psychological pain, seen as an escape from unbearable anguish.