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

question 16

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 period of revolution of Phobos to that of Deimos?

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

---

Definitions:

Rationalism

The conviction that faith should align with logic and proof.

Empiricism

The belief that our physical senses are the primary source of knowledge.

Immanuel Kant

An 18th-century German philosopher known for his work in epistemology, ethics, and aesthetics, emphasizing duty and moral universality.

Self-Serving Bias

The common tendency to attribute one's successes to personal characteristics and failures to external factors.