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:

Traumatic Event

An emotionally distressing experience that can lead to lasting psychological and emotional impact, often involving a perceived threat to safety or stability.

Depression

A medical condition characterized by persistent feelings of sadness, hopelessness, and a lack of interest or pleasure in activities.

Hormone Fluctuations

Variations in the levels of hormones in the body, which can affect a wide range of physiological and psychological functions, often cyclic or in response to certain stimuli.

Nolen-Hoeksema

A psychologist known for her work on gender differences in depression and the rumination response style theory.