Kepler's Laws: Two Moons Orbit a Planet in Nearly Circular

question 26

Multiple Choice

Kepler's laws: Two moons orbit a planet in nearly circular orbits. Moon A has orbital radius r, and moon B has orbital radius 4r. Moon A takes 20 days to complete one orbit. How long does it take moon B to complete an orbit?

• A) 20 d
• B) 40 d
• C) 80 d
• D) 160 d
• E) 320 d

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Definitions:

Memories Consolidated

The process by which initial fragile memories are transformed into stable, long-term memories.

Sleep Measured

The process of quantifying aspects of sleep, typically through various methods including polysomnography, to assess sleep quality or disorders.

Electroencephalogram

A test or method that records the electrical activity of the brain using electrodes attached to the scalp.

Neurotransmitters

Chemical messengers in the nervous system that transmit signals across synapses from one neuron to another.