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Question

A triatomic molecule is oriented as follows along the x-axis:  atom 1 of mass m is at the origin, atom 2 of mass 2m is at x = a, and, atom 3 of mass 3m is at x = 2a.  What is the moment of inertia of this molecule about the y-axis?
A) 2ma2
B) 3ma2
C) 12ma2
D) 14ma2

Answer

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