Extensive collection of experiments illustrating fundamental principles of physics. Demonstrations on this disc: Standing Sound Waves - resonance ture with piston, three lengths of resonance tubes, Kundt ’s tube, resonance tube, open and closed end pipes, slide whistle, singing pipes, tuning forks on resonant boxes, Helmholtz resonators; Gas Pressure - mercury barometer in vacuum, aneroid barometer in vacuum, Magdeburg hemispheres, adhesion plates, crush can, vacuum bazooka, barrel crush, air pressure lift, inertia shingles, rubber sheet lifting chair. Kit contains: DVD with English and Spanish audio tracks and subtitles, and bilingual study guide.