Aguitar with strings of length l = 0.69 m has new strings put on it. the low e string has a linear density of rho = 0.0079 kg/m and when tuned properly should produce a fundamental tone of ν = 82.41 hz. randomized variables l 0.73 m p 0.0059 kg/m a 50% part (a) what is the proper tension the string should be under, in newtons?