A String with a Mass Per Length of 2 $^{\circ}$ C Is 331 M/s

A string with a mass per length of 2.00 gm/m is stretched with a force of 120 N between two points that are 0.400 m apart.The fundamental frequency of the stretched string is in tune with the frequency of the second mode of an organ pipe filled with air and open at both ends.The velocity of sound in air at 0 $^{\circ}$ C is 331 m/s.If the temperature of the air decreases by 20 $^{\circ}$ C,then what is the length of the organ pipe?

A) 75.0 cm
B) 100 cm
C) 125 cm
D) 150 cm
E) 175 cm

Correct Answer:

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