Which Two Classes of Objects Were Critical to the Shapley-Curtiss

question 13

Multiple Choice

Which two classes of objects were critical to the Shapley-Curtiss Debate of 1920?

• A)white dwarfs and red giants
• B)open clusters and emission nebulae
• C)globular clusters and spiral nebulae
• D)emission nebulae and spiral nebulae
• E)planetary nebulae and white dwarfs

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Definitions:

Self-Actualisation

The realization or fulfillment of one's talents and potentialities, considered as a drive or need present in everyone.

Psychological Contracts

An unwritten agreement between employees and employers regarding mutual expectations.

Performance-Outcome Contingencies

The relationship between the performance of specific actions and the resulting outcomes, emphasizing the role of rewards or consequences.

Expectancies

Beliefs about the likelihood of a particular outcome as a result of one's actions or behaviors.