Extensive collection of experiments illustrating fundamental principles of physics. Demonstrations on this disc: Elasticity - Hooke ’s law, spring in series and parallel, torsion rod, elastic limits, Young ’s modulus, bending beams, 2:1 scaling, bologna bottle, elasticity at low temperatures; Osillations - tuning fork with light, mass on spring, air track simple harmoic motion, torsion pendulum, different mass pendula, 4:1 pendula, hoops and arcs, peldulum with large amplitude, physical pendulum, variable angle pendulum, circular motion vs. s pring and weight, circular motion vs. pendulum, phase shift, periodic non-simple haromic motion, inertia balance, pendulum waves, Lissajous figures. Kit contains: DVD with English and Spanish audio tracks and subtitles, and bilingual study guide.