Asteel guitar string with a diameter of 1.00 mm is stretched between supports 0.800 m apart. the temperature is 0.00 °c. assume both the young's modulus of 20.0 e10 n/m2 and the average coefficient a= 11.0e-6 °c-1 have constant values between 0.00 °c and 30.0 °c of expansion a) (pt) find the mass per unit length of the string (use 7.86e3 kg/m3 for the density). b) (2pts) the fundamental frequency of transverse oscillation of the string is 2.00e2 hz. what is the tension in the string c) (2pts) what was the length of the string before it was stretched? d) (5pts) now, the temperature is raised to 30.0 °c. find the resulting value of the tension in the string