1. The problem statement, all variables and given/known data A guitar's E-string has length 65 cm and is stretched to a tension of 85 N. It vibrates at a fundamental frequency of 329.79 Hz. Determine the mass per unit length of the string. 1Your answer is in kg/m 2. Relevant equations (mass per unit length) = (tension) / ((frequency)x(wave length))^2 3. The attempt at a solution The tension is 85 N, and the freq is 329.79 Hz, and how do i figure out the wave length, it thought the wavelength was twice the e string length in cm.