申論題

4. Two waves are generated on a string of length 3.0 m to produce a three-loop standing wave with an amplitude of 1.0 cm. The wave speed is 100 m/s. Let the equation for one of the waves be of the form y(x,t) = y_m sin(kx + ωt). In the equation for the other wave, what are (1) k, and (2) ω?