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:

Cell B1

Refers to the cell located at the intersection of column B and row 1 in a spreadsheet.

Manual Calculation Option

A setting in applications like spreadsheets that requires the user to request calculations instead of having them done automatically.

Quick Analysis Tool

A feature in certain software applications that provides immediate access to a range of analytical options for selected data.

Clipboard Group

A set of features in software applications (like MS Word) that manage copying, cutting, and pasting operations.