How Do the Moons of Jupiter Behave When Considered in Terms

question 145

Multiple Choice

How do the moons of Jupiter behave when considered in terms of the relationship between the period P and radius a of their orbits around the planet?

• A) Jupiter's moons follow the Keplerian relationship P² = ka³, where k is a constant that is different from that in the relation governing planetary motion around the Sun.
• B) Jupiter's moons do not obey the Keplerian relationship P² = ka³ because their motion about Jupiter is affected by Jupiter's motion about the Sun.
• C) Jupiter's moons obey the Keplerian relationship P² = ka³, where k is the same as that for planetary motion around the Sun because it is a universal constant.
• D) Jupiter's moons do not obey the Keplerian relationship P² = ka³ because they orbit Jupiter, not the Sun.

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An essential element in contract law that refers to something of value exchanged between parties as part of an agreement, which is necessary for the contract to be enforceable.

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A legal principle that enforces a promise in absence of a formal contract, provided individuals have acted in reliance on that promise.

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