Beam balance on base with suspended polystyrene ball and adjustable counterweight for demonstrating buoyancy on a body due to atmospheric pressure. At a state of equilibrium a Baroscope is placed in a vacuum bell jar under atmospheric pressure. The air in the bell jar is then evacuated the Styrofoam sphere falls on account of the reduction in lift.

Styrofoam sphere: 50 mm dia.
Base: 120x90 mm²
Height: 125 mm

Vacuum Bell Jar (U21851) and Vacuum Experiment Plate (U21850) sold separately.