Alight string with a mass per unit length of 8.00 g/m has its ends tied to two walls separated by a distance equal to three-fourths the length of the string. an object of mass m is suspended from the center of the string, putting a tension in the string. (a) find an expression for the transverse wave speed in the string as a function of the mass of the hanging object. (b) what should be the mass of the object suspended from the string in order to produce a wave speed of 60.0 m/s?