How Did Harlow Shapley Use the Period-Luminosity Relationship of RR

question 103

Multiple Choice

How did Harlow Shapley use the period-luminosity relationship of RR Lyrae variables to determine the size of the Milky Way galaxy

• A)He determined the proper motion of globular clusters in the outer disk of the galaxy.
• B)He found the distances to individual variables free floating in the halo.
• C)He found the distances to open clusters found throughout the disk of the galaxy.
• D)He found the distances to globular clusters distributed about the center of the galaxy.

Recognize the importance of environmental factors and community infrastructure in disease prevention.

Understand the historical development of public health initiatives and their impact on community health.

Analyze the role of government and non-governmental organizations in the advancement of public health.

Identify key figures and their contributions to public health and nursing.

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Definitions:

Polygenic Traits

Traits that are controlled by more than one gene, often resulting in a continuous range of possible phenotypes, such as height or skin color.

Dichotomous Traits

Characteristics or qualities that can be divided into two distinctly opposite categories or states, with no intermediate stages.

Adaptive Behaviour

A person's ability to adjust to new situations, meet social standards, and maintain daily living skills.

Evolutionary Theory

A theory explaining the process by which different kinds of living organisms developed and diversified from earlier forms during the history of earth.