Time Dilation: a Set of Twins, Andrea and Courtney, Are

question 24

Multiple Choice

Time dilation: 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:

Confirmation Bias

The inclination to seek out, understand, prefer, and remember information in a manner that validates one's existing beliefs or theories.

Cognitive Error

Faulty thinking patterns that lead to misinterpretation of experiences or interactions.

Illusory Correlation

The cognitive mistake of perceiving a relationship between two variables even when none exists.

Confirmation Bias

The tendency to search for, interpret, and remember information in a way that confirms one’s preconceptions or hypotheses.