1. The problem statement, all variables and given/known data Two transverse waves are on the same piece of string. The first has non-zero displacement only for kx + wt between pi and 2pi when it is equal to Asin(kx+wt). The second has y=Asin(kx-wt) for kx-wt between -2pi and -pi and is zero otherwise. Calculate the energy of the waves when t=0. 2. Relevant equations 3. The attempt at a solution Ok so i've sketched the waves...they look like two wavefront (one above the axis, one below) approaching each other.. I'm just not sure how to find the energy..