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A string 29.8 cm long with linear density 0.603 g/m is placed near a loudspeaker that is fed by an audio oscillator of variable frequency.

A string 29.8 cm long with linear density 0.603 g/m is placed near a loudspeaker that is fed by an audio oscillator of variable frequency. It is found that the string is set into oscillation only at the frequencies 880.0 and 1320 Hz as the frequency of the oscillator is varied over a certain range. What is the tension in the string?

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