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# A hollow pipe of length 0.8 m is closed at one cad At its open and a 0 5 m long uniform string is vibrating in its second harmonic and it rosonates with the fundamentals frequency of the pipe if the tension in the wire is 50 N and the speed of sound is , what is the mass of the string

- 20g
- 5g
- 40g
- 10g

## The correct answer is: 10g

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