Slinky, Plastic

Description :- For activating tuning forks. Rubber ball is mounted on a sturdy, wooden handle.

Description :- Diameter 20 mm length 3 meters approx. when closed, extending to 10 meters for transverse wave motion experiments.

Description :- Long slinky for super wave demonstrations. On stand with instructions.

Description :- Hollow wooden sounding box 1290 x 130 x 110 mm, with mm scale, has two fixed bridges 72 cm apart over which wires are stretched. To one wire is fitted a spring balance reading to 100 N x 5 N and its tension can be adjusted by a winged nut and measured. Another wire passes over a pulley and can be loaded as desired. A third wire, for comparison, can have its tension adjusted by a wrest-pin. With 3 movable bridges, wrest-pin key, spring balance, and set of four wires of different diameters, each 1.5 meter long, without masses.