Cylindrical Conductor, 17.5 x 8cm Base Size_8 x 5" Speed-controlled 6V motor driving two

Speed-controlled 6V motor driving two cams pumps four spring-mass systems at any chosen frequency

Used to crank a row of 16 cam-driven rods through a moving sine wave

a battery-free source of partial vacuum for bell-jar demonstrations without external power

Fifteen-times enlarged molar shows progressive caries decay through enamel and dentin into the pulp chamber

Cylindrical Conductor, 17.5 x 8cm Base Size_8 x 5" Speed-controlled 6V motor driving twoUsed to study charge distribution along a long conductor, this brass cylinder on an ebonite insulated base demonstrates Faraday cage shielding and uniform curvature charge density.