Which of the Following Pieces of Information Are Needed to Calculate

question 103

Multiple Choice

Which of the following pieces of information are needed to calculate the total mass of a binary system?

• A)the ratio of the angular separation from the centre of mass of each of the stars
• B)the semi major axis and period of the orbit
• C)the radial velocities of the two stars
• D)the time required for the small star to eclipse the larger star

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The characteristic of being able to accomplish a task or function with the minimum waste of time and effort; effectiveness combined with resourcefulness.