In a Binary Star System That Contains Stars with 2M_☉

question 34

Multiple Choice

In a binary star system that contains stars with 2M_☉ and 1M_☉,the velocity of the 2M_☉ star will be _________ times the velocity of the 1M_☉ star.

• A)0.2
• B)0.5
• C)1
• D)2
• E)3

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Definitions:

Stanines

Derived from the term “standard nines,” this is a standardized score frequently used in schools. Often used with achievement tests, stanines have a mean of 5 and a standard deviation of 2, and range from 1 to 9.

T-scores

Standardized scores with a mean of 50 and a standard deviation of 10, used to compare an individual's score against a normative sample.

Grade Equivalents

A metric used in education to compare a student's test score with the average scores of students in other grades.

NCEs

Normal Curve Equivalents, a type of standardized score used in educational assessments to compare student performance across different age groups and grades.