Two Comets Have Identical Masses

question 21

Multiple Choice

Two comets have identical masses. However, one comet is four times farther from the Sun than the other. According to Newton's Universal Law of Gravitation, the force of gravity exerted by the Sun on the more distant comet is

• A) one-quarter the size of the force exerted on the closer comet
• B) one-sixteenth the size of the force exerted on the closer comet
• C) the same size as the force exerted on the closer comet
• D) four times as large as the force exerted on the closer comet

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Definitions:

Repolarization

The process of restoring the negative charge inside a neuron or muscle cell after depolarization, preparing it for another action potential.

Electric Signals

are impulses of charged particles, such as ions, used by neurons and other cells to communicate and perform physiological functions.

Cell Body

The part of a neuron that contains the nucleus and most of the cytoplasm and organelles, serving as the metabolic center.

Neuron Cell Bodies

The part of a neuron that contains the cell nucleus and is responsible for maintaining the life of the cell and initiating neural signals.