The Moons of Mars,Phobos (Fear)and Deimos (Terror),are Very Close to the Planet

question 22

Multiple Choice

The moons of Mars,Phobos (Fear) and Deimos (Terror) ,are very close to the planet compared to Earth's Moon.Their orbital radii are 9,378 km and 23,459 km respectively.What is the ratio of the orbital speed of Phobos to that of Deimos?

• A) 0.2528
• B) 0.3998
• C) 1.582
• D) 2.858
• E) 3.956

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Definitions:

Unmarried Partners

Refers to a couple in a romantic or sexual relationship who live together but are not legally married.

Emotionally Committed

A state or condition in which an individual is deeply invested in an emotional sense, such as in a relationship or cause, leading to a strong sense of loyalty and dedication.

Disapprove

To have or express an unfavorable opinion about something or someone.

Mate Guarding

Efforts to prevent one’s sexual partner from mating with someone else in order to avoid the costs of rearing offspring that do not help to propagate one’s genes.