A stretched string fixed at each end has a mass of 40.0 g and a
length of 7.20 m. The tension in the string is 40.0 N.
(a) Determine the positions of the nodes and antinodes for the third harmonic. (Answer from smallest to largest distance from one end of the string.)
(b) What is the vibration frequency for this harmonic?
*For part (b), I keep getting 127.3 Hz which is wrong
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