A Planet in Another Solar System Orbits a Star with a Mass

question 46

Multiple Choice

A planet in another solar system orbits a star with a mass of 4.0 x 10³⁰ kg.At one point in its orbit it is 250 x 10⁶ km from the star and is moving at 35 km/s.Take the universal gravitational constant to be 6.67 x 10^-11 m²/s² .kg and calculate the semimajor axis of the planet's orbit.The result is:

• A)79 x 10⁶ km
• B)140 x 10⁶ km
• C)290 x 10⁶ km
• D)320 x 10⁶ km
• E)590 x10⁶ km

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Definitions:

Public Good

A product or service that is provided without profit to all members of a society, either by the government or a private individual or organization, characterized by non-excludability and non-rivalry.

Marginal Social Cost

The total cost to society of producing an additional unit of a good or service.

Public Good

A good that is non-excludable and non-rivalrous, meaning no one can be effectively excluded from its use, and someone's use of it does not reduce its availability to others.

Airplane Seats

The seating arrangement within an aircraft, determining passenger capacity and comfort levels.