An Astronaut on a Spaceship Moving at 0

question 18

Multiple Choice

An astronaut on a spaceship moving at 0.927c says that the trip between two stationary stars took 7.49 y. How long does this journey take as measured by someone at rest relative to the two stars?

• A) 20.0 y
• B) 2.81 y
• C) 4.05 y
• D) 22.1 y

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Definitions:

Pollution

The contamination of the natural environment, causing adverse effects on living beings and ecosystems.

Negative Externality

A cost imposed on third parties not involved in a transaction or activity, such as pollution from a factory affecting nearby residents’ health.

Second-Hand Smoke

The smoke inhaled involuntarily from tobacco being smoked by others, posing health risks to non-smokers.

Unemployment

The situation where individuals who are able and willing to work are not able to find employment.