A hollow pipe of length \( 0.8 \mathrm{~m} \) is closed at one end. At its open end a \( 0.5 \ma...
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0A hollow pipe of length \( 0.8 \mathrm{~m} \) is closed at one end. At its open end a \( 0.5 \mathrm{~m} \) long uniform string is vibrating in its second harmonic and it resonates with the fundamental frequency of the pipe. If the tension in the wire is \( 50 \mathrm{~N} \) and the speed of sound is \( 320 \mathrm{~ms}^{-1} \), the mass of the string is
(a) \( 5 \mathrm{~g} \)
(b) \( 10 \mathrm{~g} \)
(c) \( 20 \mathrm{~g} \)
(d) \( 40 \mathrm{~g} \)
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