Alpha Centauri Is Not Only the Closest Star System to Us

question 51

Multiple Choice

Alpha Centauri is not only the closest star system to us (it is actually a triple star system) but it also seems to be an excellent place to look for extra-terrestrial life.It is about 4.3 light-years away from Earth.If an astronaut claims her journey there and back only took 6.3 years,then how fast was she traveling? (Assume she made a fast turnaround once she arrived there!)

• A)0.65c
• B)0.73c
• C)0.86c
• D)0.81c
• E)0.54c

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Definitions:

Mood-Stabilizing Drug

Medication used to treat mood disorders by helping to balance mood swings, particularly in cases of bipolar disorder.

ECT

Electroconvulsive Therapy is a medical treatment most commonly used for severe depression that involves inducing seizures through electrical currents.

Imipramine

A tricyclic antidepressant used in the treatment of major depression and enuresis (bed-wetting).

Tranquilizers

A class of medications used to reduce tension, anxiety, and disturbances by depressing the central nervous system.