https://www.chegg.com/homework-help/questions-and-answers/traveling-sinusoidal-wave-propagating-x-direction-string-make-following-observations-wave--q3644360
https://www.chegg.com/homework-help/questions-and-answers/one-measurement-using-hanging-mass-m-150-grams-assume-linear-mass-density-string-u-41g-m-l-q3644354