A Relatively Fast Star Escapes an Open Cluster

question 176

Multiple Choice

A relatively fast star escapes an open cluster.What does this do to the stability of the remaining cluster?

• A) The remaining cluster becomes more stable because only the slower stars are left.
• B) The gravitational attraction of the escaping star tends to pull other stars after it, thus leading to the dissipation of the entire cluster.
• C) The remaining cluster becomes less stable because the mass and thus the escape speed are reduced.
• D) Because of the conservation of momentum, a second star must be expelled from the cluster in the opposite direction. The remaining cluster is then as stable as it was originally.

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Definitions:

Stimulus Substitution

A theory in classical conditioning suggesting that a conditioned stimulus acts as a substitute for an unconditioned stimulus, eliciting a similar response.

Basolateral Amygdala

A region of the amygdala involved in processing emotional responses, memory, and decision-making, crucial for fear conditioning and associative learning.

Corticomedial Amygdala

The section of the amygdala that is activated by a surprising event

Surprising Event

An occurrence that is unexpected and can potentially alter behavior or conditions based on its unpredictability.