You Observe Two Galaxy Clusters, Cluster a and Cluster B

question 26

Multiple Choice

You observe two galaxy clusters, cluster A and cluster B.Both have the same radius, but cluster B's outer galaxies are orbiting the cluster with circular velocities that are twice that of cluster A's circular velocities.The mass of cluster B is

• A) 2 times cluster A's mass
• B) 4 times cluster A's mass.
• C) half of cluster A's mass.
• D) one-quarter of cluster A's mass.
• E) equal to cluster A's mass.

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Definitions:

Reinforcement

A concept in behavioral psychology where a behavior is strengthened or increased by following it with a positive or rewarding stimulus.

Stimulus Discrimination

The ability to differentiate between two or more stimuli, responding only to the one that is conditioned while ignoring the others.

Learned Response

A reaction or behavior that is developed as a result of experience or conditioning.

Stimulus Generalization

The process by which a conditioned response is triggered by stimuli that are similar to the original conditioned stimulus.