If the Communication Lifetime of Civilizations in Our Galaxy Is

question 42

Multiple Choice

If the communication lifetime of civilizations in our galaxy is 10,000 years and our galaxy is 13 billion years old, what is the chance of us detecting another intelligent civilization now?

• A) 1 in 13,000
• B) 1 in 1,300,000
• C) 1 in 1300
• D) 1 in 130,000

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Definitions:

Pain Sensations

The uncomfortable feelings or perceptions associated with actual or potential tissue damage.

Muscle Strength

Describes the maximum amount of force a muscle or group of muscles can exert during a single effort.

Olfaction

The sense of smell, a chemical sense by which individuals perceive odors.

Sense

A faculty by which the body perceives an external stimulus; one of the faculties of sight, smell, hearing, taste, and touch.