If You Found a Galaxy with a Hydrogen Emission Line,normally

question 21

Multiple Choice

If you found a galaxy with a hydrogen emission line,normally found at 656.3 nm,with a measured wavelength of 756.3 nm,what would the galaxy's recessional velocity be if the Hubble constant is 72 km/s/Mpc?

• A) 39,700 km/s
• B) 45,700 km/s
• C) 47,000 km/s
• D) 54,500 km/s

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Definitions:

Disruptive Behavior Patterns

Actions or sequences of actions that interrupt the normal flow or functioning of a social or operational system.

Significant Behavior Patterns

Regularly occurring actions or reactions that have importance in predicting or understanding an individual's behavior.

Obsessions

Persistent, unwanted thoughts, images, or impulses that cause significant distress or anxiety.

Delusions

Strongly held false beliefs or judgments, which are resistant to reason or confrontation with actual fact, often occurring as a symptom of psychiatric disorders.