Set of two resonance boxes with extra heavy aluminium forks having double the duration of audible vibration than the ordinary forks. One fork is weighted and can be adjusted over range of about 30 Hz. forks are of different lengths 19.4 cm and 17.5 cm approx.
To demonstrate resonance, sympathetic vibrations, and beat phenomenon. The two precision-made bars are mounted on a single solid resonance cavity. The cavity has two chambers with one bar tuned to 440Hz. The other to 441Hz. Includes: hammer and instructions. Size: 13.78" L x 7" W x 4.13" H Grades 6+
This unit is designed to demonstrate the principle of an electrochemical call. The LCD clock runs on 2 potatoes, oranges, grapefruits, or cans of soda pop. Ages 7+
Showing internal structure and operating principles of a simple piston air cooled two stroke engine, Mounted on a polished wood base with schematic diagram, overall height 360 mm approx.
A small but powerful van de Graaff generator. Generates high potential (up to 200 KV) and sparks up to 3″. With aluminum dome (7″ dia) and discharge sphere (4″ dia). The total height is about 18″. Comes with one replacement belt and standard accessories.
A simple hand driven van de Graaff generator for producing very high electric potentials at low currents. The apparatus consist of a wooden base, insulated Perspex stand, rubber belt, removable metal dome (135 mm dia), a driving wheel and driving belt. The discharge sphere (50 mm dia) is mounted on a pivoted arm, with handle for adjustment. The length of…
Consists of two disks which can be loaded with up to 8 ball bearings in internal compartments. Load one disk symmetrically and the other non-symmetrically to show the difference. Instructions and eight solid balls included.
General purpose student bench meters with full-scale accuracy of ±2.5% and overload protection. Additional features: large 3" scale, external zero-adjust calibration, and fully enclosed plastic case with inclined meter face. Double range, 0-5 V (0.1 V)/0-15 V (0.3 V).
To show the conversion of mechanical energy into electrical energy. Turbine with transparent cover, inlet, and outlet tubes directly connected to a dynamo. Fitted on base.
