The Radius of the Earth Is Approximately 6370 Km $\pi$ R³

question 30

Multiple Choice

The radius of the Earth is approximately 6370 km. If one could dig down straight towards the center of the Earth, one would find that the innermost 3480 km (the core) has an average density of about 11.g/cm³. Above that are the mantle and crust. If the average density of the Earth is 5.5 g/cm³, what is the average density of the Earth's mantle and crust? (Recall that the volume of a sphere is given by V = (4/3) $\pi$ r³.)

• A)57.g/cm³
• B)4.5 g/cm³
• C)8.7 g/cm³
• D)5.3 g/cm³
• E)not enough data is provided

Analyze the role of infrastructure developments, like railroads, in regional economic disparities and political tensions.

Understand the political landscape and electoral dynamics leading up to the Civil War, including the fragmentation of political parties.

Assess the impact of racial ideologies and policies on different racial groups, especially African Americans and Irish immigrants.

Grasp the economic trends and ideological shifts in the South, including attitudes towards slavery and economic independence.

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Definitions:

Positive Statement

An objective statement based on factual information that can be tested and validated, often used in economics to describe what is happening without judgment of desirability.

Tax on Beer

A specific tax imposed on the sale of beer, generating revenue for the government and sometimes used to discourage excessive consumption.

College Students

Individuals enrolled in an institution of higher learning to pursue a degree or certification.

Macroeconomics

The branch of economics that focuses on the behavior, performance, structure, and decision-making of an economy as a whole, rather than individual markets.