일반물리학 1 — Waves-I: Problem 23

23 The linear density of a string is \(1.9 \times 10^{-4} \text{ kg/m}\). A transverse wave on the string is described by the equation \(y = (0.021 \text{ m}) \sin[(2.0 \text{ m}^{-1})x + (30 \text{ s}^{-1})t]\). What are (a) the wave speed and (b) the tension in the string?