The Mass of the Solar Nebula That Began Contracting to Form

question 21

Multiple Choice

The mass of the solar nebula that began contracting to form the solar system was estimated to be

• A) 1 solar mass, the same as the mass of the solar system today.
• B) only a fraction of a solar mass because additional mass has since been attracted from nearby objects.
• C) a few solar masses.
• D) thousands of solar masses to allow for the mass energy radiated away since the formation.

Grasp the statistics concerning poverty levels among different racial and ethnic groups in the United States.

Recognize the relationship between welfare, poverty levels, and government antipoverty spending.

Calculate the economic requirements for individuals and families to rise above the poverty line.

Understand the distribution of income among different quintiles in the U.S. economy.

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