Anyway, I can no-longer run many of my favorite physics applets in class, including this awesome simulation of a standing wave forming in a string with reflection.
|From: Walter Fent|
You must enable macros to use the simulation. You can use the wavelength box to adjust the width of the waves. The sheet is protected, but there's no password so if you want to muck around you can unlock the sheet and play with the VBA code. I'm sure there are improvements to be made.