A Set of Twins,Andrea and Courtney,are Initially 10 Years Old

question 46

Multiple Choice

A set of twins,Andrea and Courtney,are initially 10 years old.While Courtney remains on Earth,Andrea rides on a spaceship which travels away from Earth at a speed of 0.60c for five years (as measured by Courtney) ,then immediately turns around and comes back at 0.60c.When Andrea returns,Courtney is 20 years old.How old is Andrea upon her return?

• A) 10 y
• B) 12 y
• C) 15 y
• D) 18 y
• E) 20 y

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Definitions:

North Opposition

Generally refers to resistance or dissent from northern regions or entities against certain policies, practices, or entities, potentially in a historical or political context.

Trading Ports

Coastal towns or cities where goods are imported and exported, playing crucial roles in global and regional trade networks.

West Coast

Refers to the westernmost coastal states of the United States, typically including California, Oregon, and Washington, known for their distinct culture and economies.

Far East

A geographical term used to describe East Asian countries, including China, Japan, South Korea, and others, highlighting their location relative to Europe.