Hey! Here is one that I thought would be easy: Two traveling waves move on a string that has a fixed end at x=0. They are identical except for opposite velocities. Each has an amplitude of 2.46mm, a period of 3.65ms, and a speed of 111m/s. Write the wave function of the resulting standing wave. The wave would be represented by the function, y(x,t)=(A_sw)(sinkx)(sinwt) My answers were: A_sw=2A=4.92x10^-3m k=w/v=1720/111=15.5/m w=2*pi/T=2*pi/(3.65x10^-3)=1720rad/s This is not right though... any ideas? I am least sure about k.