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A string 25 cm long and having a mass of...

A string 25 cm long and having a mass of 2.5 g is under tension. When the string is set vibrating in its first overtone and the air in the pipe in its fundamental frequency , 8 beats per second are heard. It is observed that decreasing in the string, decreases the beat frequency . If the velocity of sound in air be `320 m*s^(-1)` find the tension in the string .

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The correct Answer is:
27 N
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