A collection of applets used to demonstrate physics and math principles. The applets include: a ray diagram drawing applet, a collision of disks applet, an electromagnetic field mapper and a 3d hydrogen orbital simulation.
PCP-net is a browser-based application to calculate preheating temperature, heat input and carbon equivalent, which can be used to avoid hydrogen cracking (cold cracking) in unalloyed and low-alloyed ferritic steels.