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:

Synapses

The junctions through which neurons communicate with each other, using chemical or electrical signals.

Neuron Branches

Dendrites and axons, which are extensions of the neuron that receive and send messages to and from other neurons.

Dendrite

Extensions of a neuron that receive signals from other neurons and convey this information to the cell body.

Cochlea

The cochlea is a spiral-shaped, fluid-filled structure in the inner ear that is responsible for converting sound vibrations into nerve impulses.