1. The problem statement, all variables and given/known data A picture of the problem can be found here: https://gyazo.com/a92447dcfebed53d4cbd12fc94300d9c 2. Relevant equations So, I've already finished part A. For part B, I'm trying to figure out how to equate the two with mass on either side of the equation so that I can solve for it. 3. The attempt at a solution Transverse wave speed = SQRT(tension/u), substitute (p*pi*d2 / 4)for mu since I don't have it -> V = SQRT(4T/p*pi*d2) where T is tension and p is rho. Now I need to find a formula for speed of longitudinal wave that includes mass so that I can equate the two velocity formulas and solve for mass. Any advice is much appreciated!