The Oxygen Molecule (O₂) May Be Regarded as Two Masses

question 31

Multiple Choice

The oxygen molecule (O₂) may be regarded as two masses connected by a spring. In vibrational motion, each oxygen atom alternately approaches, then moves away from the center of mass of the system. If each oxygen atom of mass m = 2.67 *10 ^{- 26} kg has a vibrational energy of 6.4 * 10^-21 J and the effective spring constant is 50 N/m, then what is the amplitude of oscillation of each oxygen atom?

• A) 3.2 *10^-11 m
• B) 1.6 *10^-11 m
• C) 1.1 * 10^-11 m
• D) 8.0 *10^-12 m

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