The velocity of a wave on a string depends on how tightly the string is stretched, and on the mass per unit length of the string. If FT is the tension in the string, and µ is the mass/unit length, then the velocity, v, can be determined by the following equation.
A piece of string 5.30 m long has a mass of 17.0 g. What must the tension in the string be to make the wavelength of a 128 Hz wave 120.0 cm?