A simple and economical apparatus for demonstration of geometrical center of gravity of two-dimensional objects. PVC rod mounted on a base with a suspension screw at the top, 4 clear acrylic laminas – circular, triangular, square and trapezoidal. Each lamina has suspension holes along its periphery. The point of intersection of lines drawn from the point of suspension of 2 or more holes of a lamina gives the center of gravity of that lamina.

This device provides an effective and very simple clamping system for testing the strength of the ductile wires such as copper, sewing threads, fishing lines and human hair etc. The material is clamped between the washers with the help of a wing nut clamp and the wire is routed through the holes provided in the clamps. The strength is checked by attaching one of the clamps to the clamp provided in the laboratory and loading the lower clamp with slotted weights. A maximum of 15 kg of weight can be hanged. Supplied without weights.

For demonstration of Boyle’s law to group of students. With Glass tube protected by a plastic safety screen, Volume of air is read from a scale on the tube and pressure is measured by a Bourdon gauge. Mounted on a plastic base.