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:

AIDS

Acquired Immunodeficiency Syndrome, a chronic, potentially life-threatening condition caused by the human immunodeficiency virus (HIV) that damages the immune system.

Unprotected Sex

Engaging in sexual activities without the use of contraceptives or barrier methods, increasing the risk of sexually transmitted infections (STIs) and unwanted pregnancies.

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Human Immunodeficiency Virus, a virus that attacks the immune system and can lead to AIDS if not treated.

Market Economy

An economic system in which production and prices are determined by unrestricted competition between privately owned businesses.