The D-string on a properly tuned guitar produces a tone with a fundamental frequency of 146.8 Hz. The oscillating length of a D-string on a certain guitar is 0.69 m. This name length of string is weighed and found have a mass of 1.6 times 10^-3 kg. At what tension, in newtons, must the D-string must be sketched in order for it to be properly tuned? What is the wavelength, in meters, of the standing wave in the D-string when it is oscillating, at its third harmonic (also called its second overtone)? Determine the frequency, in hertz, of the third harmonic of the tone produced by the properly turned D-string. The guitarist shortens the oscillating length of the properly tuned D-string by 0.11 m by pressing on the string with a finger. What is the fundamental frequency, in hertz, of the new tone that is produced when the string is plucked?