[SOLVED] Finding mass per unit length for stretched strng given tension? A transverse wave on a stretched string under Tension = 5N is defined by the equation: y(x,t) = 0.1cos(2pi/5(x - 10t) Find: a) amplitude = 0.1 m b) wavelength = 0.4 m c) angular frequency = 4 rad/s d) wave velocity = 0.1. m/s e) mass per unit length ??? f) for t = 0, sketch how y varies with x. ??? I can do the first 4 parts be using the solution to the wave equation. Any ideas on how to do the other two bits? thanks.