Two Spaceships Approach Earth from Opposite Directions

question 49

Multiple Choice

Two spaceships approach Earth from opposite directions. One has a speed of 0.21c and the other a speed of 0.34c, both relative to Earth. What is the speed of one spaceship relative to the other?

• A) 0.58c
• B) 0.55c
• C) 0.64c
• D) 0.61c
• E) 0.51c

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Definitions:

Behavior

Actions or reactions of an individual or system in response to external or internal stimuli.

Nervous System

The complex network of nerve cells and fibers that transmits nerve impulses between parts of the body, facilitating all bodily functions and responses.

Immune System

The body's defense network designed to guard against infections and other pathogens through a complex system of cells, tissues, and organs.

Mental Health

A state of well-being in which an individual realizes his or her own abilities, can cope with the normal stress of life, can work productively, and is able to make a contribution to his or her community.