MOVIES.  These will be put in appropriate places in my web pages. 

After you open a movie, you may need to click on it.

1slit2  interference

AC7  alternating current

ACTween3  ditto

buoyant force

circle3  interference

collision1D  elastic head-on

concaveL lens

convexL

crash  energy

DCcircuit

decay radioactive

diode

EMwaveSlides electromag

equilib

faraday induced V

fission2  neutron hits nucleus

flatMirror

football kick

forceBall force with arrow keys

forcecart change angle

frictionExp2 on incline

goodSine wave

mirrors

numbers Click & Clack puzzler: re-arrange 76 = 24 to make it correct. No new symbols, no deletions.

osmosis watch osmosis

pendulum

planet orbit

prism

projecHoriz throw ball horizontally

satellite2 orbit

SHM simple harmonic motion

SHMguide

sineWave

spinCoil in magnetic field, induce AC

spring

springBalls two balls connected with spring

stdWave standing wave

vec  vectors

venturi flowing fluid