A Spaceship Is Observed from the Earth to Be Moving

question 9

Multiple Choice

A spaceship is observed from the Earth to be moving toward a star at a speed of 0.80 c. If the distance from the spaceship to the star is 1.6 ly as measured from Earth, how long does an observer on Earth find that it takes for the spaceship to reach the star?

• A) 2.0 y
• B) 2.1 y
• C) 1.6 y
• D) 1.2 y
• E) 0.96 y

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Definitions:

Dominating Influence

A significant impact or control over individuals or situations, often leading to a position of authority.

Authority

The legitimate power given to an individual or a body to make decisions and enforce obedience.

Power

The capacity or ability to direct or influence the behavior of others or the course of events.

Operative

Relating to or involved in the functioning of operations or activities within an organization or system.