A Relatively Fast Star Escapes an Open Cluster

question 237

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:

Closed Social System

describes a society or social group that is relatively isolated from outside influences and changes, with strict limits on social mobility and interactions.

City-States

Independent, self-governed cities that function as individual political entities, historically common in ancient Greece and Italy.

Crumbling World

A metaphor describing a state of decline or disrepair, often used to highlight issues in society, the environment, or global stability.

Indifference

A state of neutrality or lack of interest and concern towards a certain matter.