Energy:

• Capacitors
  
• Cathode Tube
  
• Hydropower
  
• Inductance
  
• Mind Control
  
• Parallel Circuits
  
• Power Generation
  
• Radiation
  
• Rocket

Light:

• Boing Light
  
• Doppler Astronomical
  
• Inverse Square Law
  
• Laser Height Detector
  
• Laser Lever
  
• Laser Optics
  
• Laser Rangefinder
  
• Super Collider
  
  
  

Sound:

• Digital Transmission
  
• Hearing - The Ear
  
• Multiplexing Sound
  
• Music Fence
  
• Sound Beat Phenomena
  
• Speed of Sound
  
  
  

Bionics/Robotics:

• Robot Manufacturing
• Bionic Hand
• Robot Pneumatic
  

Magnetism:

• Cathode Tube
  
• Compass and Gyro
  
• Electromagnetic Fields
  
• Magnetic Forces
  
• Magnetic Storage
  
• Maglev Propulsion
  
• Maglev Racetrack
  
• Maglev Transport
  
• Magnet Chair
  
• Massdriver
  
  

Motion:

• Chaotic Pendulum
  
• Coupled Pendulums
  
• Ellipse
  
• Floating Stone
  
• Gravity Well
  
• Gyro Stabilizer
  
• Gyro Tops
  
• Gyrocycle
  
• Harmonograph
  
• Highwire Bike
  
• Moon Walk
  
• Newton's Cradle
  
• Parabolic Putting Green
  
• Pendulum
  
• Puck Launch
  
• Skater
  
• Son of Spin Doctor
  
• Square Wheels
  
• Surface of Revolution
  
• Trajectories
  
• Water Hill
  
• Zero G Ferris Wheel
  
  

Frequency:

• GPS
  
• Ionosphere
  
• Microwave Transmit
  
• Moon Walk
  
• Mutoscope
  
• Radar
  
• Radar Gun
  
• Resonance
  
• Ripple Tank
  
• Sonar
  
• TV