A Planet Is Made of Two Distinct Materials in Two $\times$

question 67

Multiple Choice

A planet is made of two distinct materials in two layers.From the core to R/2,the density of the material is 4000 kg/m³,and from R/2 to R the density is 3000 kg/m³.What is the mass of the planet if R = 5000 km?

• A)2.62 \(\times\) 10²³ kg
• B)1.37 \(\times\) 10²⁴ kg
• C)1.64 \(\times\) 10²⁴ kg
• D)1.57 \(\times\) 10²⁴ kg
• E)1.87 \(\times\) 10²⁴ kg

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Definitions:

Free Trade

Trade that is unregulated by government tariffs or other artificial barriers; the levels of exports and imports occur naturally, as a result of supply and demand.

Consumer Surplus

The variance between the amount consumers are ready to pay for a good or service compared to the actual price they pay.

International Trade

the exchange of goods and services across international borders or territories.

Autarky

An economic system where a region or country is self-sufficient and does not engage in international trade.