The Main-Sequence Lifetime of a Star Is Given by the Equation

question 71

Multiple Choice

The main-sequence lifetime of a star is given by the equation:

• A) " \( \tau \) \(\infty\) M/L"
• B) " \( \tau \) \(\infty\) L/M"
• C) " \( \tau \) \(\infty\) M ²/L"
• D) " \( \tau \) \(\infty\)L²/L"
• E) " \( \tau \) \(\infty\) M/L²"

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Definitions:

Outer Join

A type of SQL join that returns all rows from one or both of the participating tables where the join condition is met, including those with no counterpart in the other table.

Default Join

The implicit join that occurs between tables in a database query when no specific join type is specified.

Indexed

A database feature that improves the speed of data retrieval operations by creating a data structure that allows for fast searches of a particular column or columns.

Sort

The operation of arranging data in a specific order, usually ascending or descending.