SciHawks

Physics - we clarified the requirement for a standing wave: there must be a node (equilibrium position of zero amplitude) at each end of the wave; thus, any MULTIPLE of a HALF wavelength equal to the distance between beginning and final nodes will produce a standing wave. So, our formula for an acceptable wavelength that will produce a standing wave is length (from beginning node to final node) divided by 2n, where n is any integer. So wavelength = length/2n
Click on the image below (by the two dots) to see animation of interfering waves. 












AP Chem - we took the unit exam on Acids and Bases.