{"type":"rich","version":"1.0","title":"One-dimensional wave equation","html":"<span class=\"wb-embed wb-embed-math\" data-latex=\"\\frac{\\partial^{2}u}{\\partial t^{2}}=c^{2}\\frac{\\partial^{2}u}{\\partial x^{2}}\">\\frac{\\partial^{2}u}{\\partial t^{2}}=c^{2}\\frac{\\partial^{2}u}{\\partial x^{2}}</span>","width":640,"height":320}