Star S1 Is Moving Away from Us at a Speed

question 58

Multiple Choice

Star S1 is moving away from us at a speed of 0.8c.Star S2 is moving away from us in the opposite direction at a speed of 0.5c.The speed of S1 as measured by an observer on S2 is:

• A)0.21c
• B)0.50c
• C)0.93c
• D)1.3c
• E)2.2c

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Definitions:

Variables

Elements, features, or factors that are liable to vary or change.

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Research methods that examine the relationship between two or more variables to determine if a correlation exists.

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A disease characterized by the uncontrolled growth and spread of abnormal cells in the body.