The harmonic wave `y_i = (200xx 10^(-3)) cos pi (2.0x - 50 t)` travels along a string toward a boundary at x =0 with a second string. The wave speed on the second string is 50 m/s. Write expressions for reflected and transmitted waves. Assume SI units.

Explanation

(a) `(6.67 xx 10^(-4)) cos pi (2.0 x + 50t)`
(b) `(2.67 xx 10^(-3)) cos pi (1.0 x - 50 t)` SI units