Assume That You Discovered a New Planet in the Solar

question 83

Multiple Choice

Assume that you discovered a new planet in the Solar System.To study it,you measured the orbital period and semimajor axis of one of its moons and deduced that the planet's mass was 4 × 10²⁵ kg (7 M_Earth) ,then you observed the planet occult a background star and deduced that its radius is 12,000 km (2 R_Earth) .What is this planet's average density? Is this planet's chemical composition more similar to a rocky terrestrial planet or a giant planet? For comparison,the density of iron,rock,and water are approximately 9,000 kg/m³,3,000 kg/m³,and 1,000 kg/m³,respectively.

• A)The planet's average density is 1,200 kg/m³,and its composition is similar to that of giant planets.
• B)The planet's average density is 1,200 kg/m³,and its composition is similar to that of terrestrial planets.
• C)The planet's average density is 3,100 kg/m³,and its composition is similar to that of terrestrial planets.
• D)The planet's average density is 5,500 kg/m³,and its composition is similar to that of giant planets.
• E)The planet's average density is 5,500 kg/m³,and its composition is similar to that of terrestrial planets.

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Definitions:

Middle-Class

A social group between the working class and upper class, characterized by moderate income and educational attainment.

Lower-Class

A social group that is situated at the bottom of a society's hierarchy, often associated with lower income and limited access to resources and opportunities.

Canadian Class Structure

The hierarchical organization of social classes in Canada, affecting access to resources and social status.

Old Money

Wealth that has been inherited over several generations, often associated with families that maintain a high social status.