Step-by-step explanation:
The wave equation which is propagating down a string of unknown material is given by :
................(1)
The general equation of wave is given by :
..............(2)
Comparing equation (1) and (2) we get:
(a)


f = 0.954 Hz
(b) Radian frequency,

(c) k = 7


(d) Wave number,

(e) Speed of sound,


v = 0.849 m/s
Hence, this is the required solution.