Rubber Hammer, Medium

Description :- Demonstrating longitudinal and transverse waves. A number of eccentric discs move a number of metal rods. Transverse waves are obtained by straight rods and longitudinal waves by bent rods.

Description :- For use with ripple tank, simple form. A disc of 250 mm diameter with 12 equispaced slots and a finger hole, rotating on its axis, with handle.

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.

Description :- Set of eight copper pipes with tuning fork (256 Hz) to show how resonance tones can only be created from certain pipes. O-rings are attached to the ends of the pipes which protects the tubes from the drop In.