The E-string on a violin produces a frequency of 660 Hz, and the wavelength of the standing wave on the string is 650 mm, a) Estimate the speed of the travelling wave on the violin

b) If that E-string has a tension of 82.3 N, what is the density of the metal that the string is made of? Assume that the string is perfectly circular, with a radius of 0.27 mm. Density is defined as p = m/V, and the volume of a cyliner is V = πr²L.