3B10  Transverse Pulses and Waves
            .10 Pulse on a Spring
            .10 Pulse on a Rope
            .20 Slinky on the Table
            .30 Bell Labs Wave Machine
            .55 Three Hoops on OHP
3B20  Longitudinal Pulses and Waves
            .15 Slinky on a Cord
            .30 Longitudinal Wave Model
3B22  Standing Waves
            .10 Melde's Vibrating String
            .53 Longitudinal Standing Wave in Spring
            .61 Driven Longitudinal Wave Model
3B25  Impedence and Dispersion
            .10 Impedance Matching
            .15 Impedance Mismatch at Boundary
            .40 Music Box on Table
3B27  Compound Wave
            .10 Superposition with Long Spring
3B30  Wave Properties of Sound
            .30 Bell in a Vacuum
            .50 Helium Talking
3B33  Phase and Group Velocity
            .21 Group Velocity
3B35  Reflection and Refraction
            .30 Parabolic Reflector
3B39  Transfer of Energy in Waves
3B40  Doppler Effect
            .10 Doppler Buzzer
3B45  Shock Waves
3B50  Interference and Diffraction
            .10 Single Slit in Ripple Tank
            .25 Double Slit in Ripple Tank
            .40 Moire Pattern on OHP
3B55  Interference and Diffraction of Sound
            .10 Two Speaker Interference
            .13 Interference Pattern Measured
3B60  Beats
            .10 Beat Forks
            .15 Beats with Organ Pipes
            .18 Beats from Hoot Tubes
            .20 Beats on Scope
            .21 Beats with Digital Function Generators
3B70  Coupled Resonators
            .10 Sympathetic Vibrations - Tuning Forks
            .15 Sympathetic Vibrations - Guitar Strings
            .20 Coupled Speaker/Tuning Fork
            .31 Tuning Fork and Guitar