Two Moons Orbit a Planet in Nearly Circular Orbits

question 26

Multiple Choice

Two moons orbit a planet in nearly circular orbits.Moon A has orbital radius r,and moon B has orbital radius 4r.Moon A takes 20 days to complete one orbit.How long does it take moon B to complete an orbit?

• A) 20 d
• B) 40 d
• C) 80 d
• D) 160 d
• E) 320 d

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Definitions:

Comparative Reasoning

A method of reasoning by which one compares similarities and differences among objects, concepts, or scenarios.

Notoriously Weak

A description for something known widely and unfavorably for lacking strength, efficiency or quality.

Logical Perspective

An approach or point of view that is based on clear, reasoned thinking and evidence.

Assert Comparisons

Making statements that establish similarities or differences between two or more items.