Superposition
http://physics.bu.edu/~duffy/HTML5/interference_of_pulses.html
Transverse waves
Standing waves on a string
http://physics.bu.edu/~duffy/HTML5/transverse_standing_wave.html
Time trace vs snapshot
Standing waves
Wave properties
Standing waves
Wave properties
Investigate speed, frequency wavelength, sound
http://www.physicsclassroom.com/Physics-Interactives/Waves-and-Sound/Simple-Wave-Simulator