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A 0.400 m string fixed at both ends has a mass per unit length of 9.00...

A 0.400 m string fixed at both ends has a mass per unit length of 9.00 x 10-3 kg/m is vibrating at its second harmonic mode. This frequency is in resonance with the second resonance mode of a 1.75 m long pipe open at one end. (Answer in three significant figures).

A. Sketch the standing wave pattern of the second harmonic of the string. Indicate node (N) and anti-node (A) in the sketch.

B. What is the second resonance frequency of the pipe? The air is at 28 degrees Celsius.

Please write clearly and legibly!

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